NISO DRAFT STANDARD

*Data Dictionary*

-   *Technical Metadata for Digital Still Images* ---

Working Draft, 1.2

November 13, 2023

**Foreword**

Cultural institutions and commercial organizations are increasingly
engaged in creating libraries of digital still images. A major challenge
in making these collections persist is to build systems, defined broadly
as "digital repositories," that maintain functionality and quality
intrinsic to images. One management strategy, migration, proposes to
preserve image data by copying files to new formats at designated
intervals.

The premise that underlies migration is the same that informs new
concepts of preservation: digital technologies offer the unprecedented
opportunity to preserve content without any loss of information from
generation to generation. Whether this is possible, and under what
conditions, are two of the questions that led NISO, CLIR, and RLG to
sponsor an "Image Metadata Workshop" in April 1999. The workshop goal
was to launch a collaborative effort to define a set of metadata
elements to document technical attributes of digital still images.

The workshop organizers observed that cultural institutions had been
focusing primarily on defining descriptive metadata for the purpose of
discovery and identification, and that comparatively little work had
been done to codify technical attributes of digital images and their
production. Workshop participants agreed that technical metadata is
necessary to support two fundamental goals: to document image provenance
and history (production metadata); and to ensure that image data will be
rendered accurately on output (to screen, print, or film). Several
participants also observed that ongoing management, or "preservation,"
of these core functions will require the development of applications to
validate, process, refresh, and migrate image data against criteria
encoded as technical metadata.

Two overarching goals led NISO to develop this data dictionary. The
first is to identify the data elements that would be used by
applications to control transformations of images against stated metrics
(or "anchors") for meaningful quality attributes such as detail, tone,
color, and size. The second is to propose elements that would be used by
digital repository managers, curators, or imaging specialists to assess
the current value (aesthetic or functional) of a given image or
collection of images.

Design Principles

The authors of this dictionary are indebted to three working groups that
have developed technical metadata specifications for digital still
images:

-   Digital Imaging Group (DIG), DIG35 Working Group, *Metadata for
    Digital Images, Working Draft 2.0 Beta --- June 18, 2000*

-   ISO Technical Committee 42 *---* Photography, *ISO/DIS 12234-2,
    Photography --- Electronic still picture imaging --- Removable
    memory --- Part 2: Image data format --- TIFF/EP*, WG18/Item 189.2,
    June 21, 2000

-   Adobe Developers Association, *TIFF, Revision 6.0, Final --- June 3,
    1992*

Although TIFF and TIFF/EP are file format specifications, the TIFF data
elements and values (presented as fields with associated file header
tags) are used to represent a comprehensive list of metadata used to
render and manage image data.

The DIG35 specification distinguishes itself from file format
specifications with its stated purpose to facilitate metadata *sharing*.

**Contents**

[1. Introduction 8](#introduction)

[1.1. Audience 8](#audience)

[1.2. Scope 8](#scope)

[1.3. Design Principles 9](#design-principles)

[1.3.1. Design Goals 9](#design-goals)

[1.4. Implementation Guidelines 9](#implementation-guidelines)

[1.4.1. Metadata Encoding 9](#metadata-encoding)

[1.4.2. Metadata Production 9](#metadata-production)

[1.4.3. Metadata Assumptions 10](#metadata-assumptions)

[1.5. Terminology 10](#terminology)

[1.6. Field Reference Guide 10](#field-reference-guide)

[1.6.1. Data Types 10](#data-types)

[1.6.2. Documentation 11](#documentation)

[2. Basic Image Parameters 13](#basic-image-parameters)

[2.1. Format 13](#format)

[2.1.1. MIMEType 13](#mimetype)

[2.1.2. ByteOrder 13](#byteorder)

[2.1.3. Compression 14](#compression)

[2.1.3.1. CompressionScheme 14](#compressionscheme)

[2.1.3.2. CompressionLevel 14](#compressionlevel)

[2.1.4. PhotometricInterpretation 14](#photometricinterpretation)

[2.1.4.1. ColorSpace 14](#colorspace)

[2.1.4.2. ICCProfile 15](#iccprofile)

[2.1.4.3. YCbCrSubSampling 16](#ycbcrsubsampling)

[2.1.4.4. YCbCrPositioning 16](#ycbcrpositioning)

[2.1.4.5. YcbCrCoefficients 17](#ycbcrcoefficients)

[2.1.4.6. ReferenceBlackWhite 17](#referenceblackwhite)

[2.1.5. Segments 18](#segments)

[2.1.5.1. SegmentType 18](#segmenttype)

[2.1.5.2. StripOffsets 18](#stripoffsets)

[2.1.5.3. RowsPerStrip 19](#rowsperstrip)

[2.1.5.4. StripByteCounts 19](#stripbytecounts)

[2.1.5.5. TileWidth 19](#tilewidth)

[2.1.5.6. TileLength 19](#tilelength)

[2.1.5.7. TileOffsets 20](#tileoffsets)

[2.1.5.8. TileByteCounts 20](#tilebytecounts)

[2.1.6. PlanarConfiguration 20](#planarconfiguration)

[2.2. File 21](#file)

[2.2.1. ImageIdentifier 21](#imageidentifier)

[2.2.1.1. ImageIdentifierLocation 21](#imageidentifierlocation)

[2.2.2. FileSize 21](#filesize)

[2.2.3. Checksum 22](#checksum)

[2.2.3.1. ChecksumMethod 22](#checksummethod)

[2.2.3.2. ChecksumValue 22](#checksumvalue)

[2.2.4. Orientation 22](#orientation)

[2.2.5. DisplayOrientation 23](#displayorientation)

[2.2.6. TargetedDisplayAR 23](#targeteddisplayar)

[2.2.6.1. XTargetedDisplayAR 23](#xtargeteddisplayar)

[2.2.6.2. YTargetedDisplayAR 24](#ytargeteddisplayar)

[2.3. PreferredPresentation 24](#preferredpresentation)

[3. Image Creation 25](#image-creation)

[3.1. SourceType 25](#sourcetype)

[3.2. SourceID 26](#sourceid)

[3.3. ImageProducer 26](#imageproducer)

[3.4. HostComputer 26](#hostcomputer)

[3.4.1. OS (Operating System) 27](#os-operating-system)

[3.4.2. OSVersion 27](#osversion)

[3.5. DeviceSource 27](#devicesource)

[3.6. ScanningSystemCapture 28](#scanningsystemcapture)

[3.6.1. ScanningSystemHardware 28](#scanningsystemhardware)

[3.6.1.1. ScannerManufacturer 28](#scannermanufacturer)

[3.6.1.2. ScannerModel 28](#scannermodel)

[3.6.2. ScanningSystemSoftware 29](#scanningsystemsoftware)

[3.6.2.1. ScanningSoftware 29](#scanningsoftware)

[3.6.2.2. ScanningSoftwareVersionNo 29](#scanningsoftwareversionno)

[3.6.3. ScannerCaptureSettings 30](#scannercapturesettings)

[3.6.3.1. PixelSize 30](#pixelsize)

[3.6.3.2. PhysScanResolution 30](#physscanresolution)

[3.7. DigitalCameraCapture 31](#digitalcameracapture)

[3.7.1. DigitalCameraManufacturer 31](#digitalcameramanufacturer)

[3.7.2. DigitalCameraModel 31](#digitalcameramodel)

[3.7.3. CameraCaptureSettings 31](#cameracapturesettings)

[3.7.3.1. FNumber 31](#fnumber)

[3.7.3.2. ExposureTime 31](#exposuretime)

[3.7.3.3. Brightness 32](#brightness)

[3.7.3.4. Exposure Bias 32](#exposure-bias)

[3.7.3.5. SubjectDistance 32](#subjectdistance)

[3.7.3.6. MeteringMode 33](#meteringmode)

[3.7.3.7. SceneIlluminant 33](#sceneilluminant)

[3.7.3.8. ColorTemp 33](#colortemp)

[3.7.3.9. FocalLength 34](#focallength)

[3.7.3.10. Flash 34](#flash)

[3.7.3.11. FlashEnergy 34](#flashenergy)

[3.7.3.12. FlashReturn 34](#flashreturn)

[3.7.3.13. BackLight 35](#backlight)

[3.7.3.14. ExposureIndex 35](#exposureindex)

[3.7.3.15. AutoFocus 35](#autofocus)

[3.7.3.16. PrintAspectRatio 36](#printaspectratio)

[3.8. Sensor 36](#sensor)

[3.9. DateTimeCreated 37](#datetimecreated)

[3.10. Methodology 37](#methodology)

[4. Imaging Performance Assessment 38](#imaging-performance-assessment)

[4.1. Spatial Metrics 39](#spatial-metrics)

[4.1.1. SamplingFrequencyPlane 39](#samplingfrequencyplane)

[4.1.2. SamplingFrequencyUnit 40](#samplingfrequencyunit)

[4.1.3. XSamplingFrequency 40](#xsamplingfrequency)

[4.1.4. YSamplingFrequency 41](#ysamplingfrequency)

[4.1.5. ImageWidth 41](#imagewidth)

[4.1.6. ImageLength 41](#imagelength)

[4.1.7. Source_Xdimension 42](#source_xdimension)

[4.1.7.1. Source_XdimensionUnit 42](#source_xdimensionunit)

[4.1.8. Source_Ydimension 42](#source_ydimension)

[4.1.8.1. Source_YdimensionUnit 43](#source_ydimensionunit)

[4.2. Energetics 43](#energetics)

[4.2.1. BitsPerSample 43](#bitspersample)

[4.2.2. SamplesPerPixel 44](#samplesperpixel)

[4.2.3. Extrasamples 44](#extrasamples)

[4.2.4. Colormap 44](#colormap)

[4.2.5. GrayResponseCurve 45](#grayresponsecurve)

[4.2.6. GrayResponseUnit 45](#grayresponseunit)

[4.2.7. WhitePoint 46](#whitepoint)

[4.2.8. PrimaryChromaticities 46](#primarychromaticities)

[4.3. TargetData 46](#targetdata)

[4.3.1. TargetType 47](#targettype)

[4.3.2. TargetID 48](#targetid)

[4.3.2.1. TargetIDManufacturer 48](#targetidmanufacturer)

[4.3.2.2. TargetIDName 48](#targetidname)

[4.3.2.3. TargetIDNo 48](#targetidno)

[4.3.2.4. TargetIDMedia 49](#targetidmedia)

[4.3.3. ImageData 49](#imagedata)

[4.3.4. PerformanceData 49](#performancedata)

[4.3.5. Profiles 50](#profiles)

[5. Change History 51](#change-history)

[5.1. Image Processing 53](#image-processing)

[5.1.1. DateTimeProcessed 53](#datetimeprocessed)

[5.1.2. SourceData 53](#sourcedata)

[5.1.3. ProcessingAgency 54](#processingagency)

[5.1.4. ProcessingSoftware 54](#processingsoftware)

[5.1.4.1. ProcessingSoftwareName 54](#processingsoftwarename)

[5.1.4.2. ProcessingSoftwareVersion 54](#processingsoftwareversion)

[5.1.5. ProcessingActions 54](#processingactions)

[5.2. Previous Image Metadata 55](#previous-image-metadata)

[6. References 56](#references)

# Introduction

## Audience

The purpose of this data dictionary is to define a standard set of
metadata elements for digital images. Standardizing the information
allows users to develop, exchange, and interpret digital image files. It
has been designed to facilitate interoperability between systems,
services, and software, as well as to support the long-term management
of and continuing access to digital image collections.

Cultural institutions, publishers, rights holders, and other
organizations are engaged in digitizing visual materials from historic
collections. Therefore, the metadata blocks presented in this document
are structured to accommodate practices associated with digital copy
photography, such as the use of technical targets, as well as the
techniques related to direct digital photography of original scenes.

The purpose of this draft standard is to facilitate the development of
applications to validate, manage, migrate, and otherwise process images
of enduring value. Such applications are viewed to be essential
components of large-scale digital repositories and digital asset
management systems.

## Scope

This data dictionary presents a comprehensive list of technical data
elements relevant to the management of digital still images. In this
context, "management" refers to the tasks and operations needed to
support image quality assessment and image data processing throughout
the image life cycle. "Quality assessment" is defined broadly, as it
refers both to machine operations and curatorial evaluations. Technical
metadata have been identified to "anchor" meaningful attributes of image
quality that can be measured objectively, such as detail, tone, color,
and size.

This standard frequently refers to images maintained in the TIFF (Tagged
Image File Format) format. The TIFF format is a highly flexible and
platform-independent format that is supported by numerous
image-processing applications. The TIFF specification is publicly
available to all users. The structure of the header includes a rich set
of technical information important for long-term retention such as for
colorimetry, calibration, gamut tables, etc. The information is also
very useful for remote sensing and multispectral applications. The
repeated references to and examples citing the TIFF format within this
standard can be extended to other file formats. The technical dictionary
indicates the information and metadata all image files should contain as
well as additional information related to image production.

[Metadata Out of Scope]{.underline}

Except for documentation of the systems that were used to create an
image, metadata to document provenance, authenticity, or other aspects
of image integrity are beyond the scope of this dictionary. Similarly,
Intellectual Property and Rights (IPR) metadata, including ownership
responsibility, is not covered. Although such metadata may be integral
to digital repository development and asset management, other emerging
draft standards such as the DOI Namespace initiative address this type
of metadata. As stated above, data elements in this dictionary focus
upon the object class of digital still images.

##  Design Principles

### Design Goals 

The design goals of this NISO initiative are to define a metadata set
that interoperates with and meets the goal outlined by the DIG35
metadata standard. To that end, the NISO group has adapted the original
DIG35 goals as follows:

-   INTERCHANGEABLE: the NISO metadata set is based on a sound
    conceptual model that is both generally applicable to many
    applications and assured to be consistent over time.

-   EXTENSIBLE AND SCALEABLE: the NISO metadata set enables application
    developers and hardware manufacturers to utilize additional metadata
    fields. This allows future needs for metadata to be fulfilled with
    limited disruption of current solutions.

-   IMAGE FILE FORMAT INDEPENDENT: the NISO metadata set does not rely
    on any specific file format and can therefore be supported by many
    current and future file formats and compression mechanisms.

-   CONSISTENT: the NISO metadata set works well with existing standards
    and it is usable in a variety of application domains and user
    situations.

-   NETWORK-READY: the NISO metadata set provides seamless integration
    with a broad variety of systems and services. Integration options
    include database products and the utilization of XML schemas (the
    recommended implementation method).

## Implementation Guidelines

### Metadata Encoding

Although recommendations for metadata encoding were deemed beyond the
scope of the data dictionary, logical structures have been proposed for
several metadata blocks to serve the development of a data model (see
Sections 2.1.5, 4.1, 4.3, 5.1, and 5.2).

The dictionary authors recommend adopting TIFF/EP's guideline
prohibiting default values: "\...\[for every field\] do not allow
default values. [All values shall be explicitly stated]{.underline}.
This is done to improve interoperability \..." (TIFF/EP, p4, emphasis
added).

### Metadata Production

The dictionary assumes that metadata mappings will be essential to
automate the collection of technical metadata. Since the design model
presumes that NISO-compliant metadata will be stored *outside* the
image, applications will need to be developed (or identified) that
"harvest" file header data programmatically (see 1.4.3 Metadata
Assumptions). The dictionary implicitly presents the mappings between
TIFF's required "Baseline Fields" and selected NISO data elements.

### Metadata Assumptions 

This dictionary adopts the following assumptions articulated in the
DIG35 specification:

-   General-purpose metadata standards must be "applicable to the
    broadest possible class of file formats" (3.2.1)

-   To facilitate the management (processing) of the widest range of
    file formats, an image management metadata standard should
    "...[assume the existence of a file format that contains no header
    information]{.underline}." (3.2.1, emphasis added) In other words,
    data that exists in file headers to comply with specifications for a
    given image format will need to be replicated.

-   There should never be any conflicts between the metadata specified
    in this standard and file header metadata; technical metadata
    specified in this standard "... [should be considered informational
    and not be used to decode the image data stored in the associated
    file]{.underline}" (3.2.1, emphasis added)

-   Metadata conflicts: in Section 3.2.1, DIG35 states, "\... if there
    is a conflict \... the file header shall always take precedence."

## Terminology

The dictionary adopts the following concepts and terminology:

-   *field* refers to the entire data element

-   *tag* refers only to the i.d. number of each data element

-   *image* or *image* *data* refers to a two-dimensional array of
    *pixels*

-   image data is stored using either strips or tiles, which are
    collectively termed *segments*

-   *processed image* refers to an image that has had one or more image
    processing steps applied after scanning (see *Section 5.1 Image
    Processing*)

-   each pixel consists of one or more color *components*, e.g.:

```{=html}
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```
-   bilevel and grayscale data have one color component per pixel

-   RGB color data has three components per pixel

```{=html}
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```
-   *component* is preferred over its synonyms *sample* and *channel*

-   *sampling frequency* is used to refer to the number and placement of
    pixels in the image (see *Section 4.1 Spatial Metrics*)

## Field Reference Guide

### Data Types

The following data types are used in this dictionary:

+---------------+------------------------------------------------------+
| **Data Type** | **Definitions**                                      |
+---------------+------------------------------------------------------+
| DateTime      | Recorded in compliance with the W3C Note profile of  |
|               | ISO 8601 "Representation of dates and times." The    |
|               | W3C Note defines a profile of ISO 8601, the          |
|               | International Standard for the representation of     |
|               | dates and times. This information will most likely   |
|               | be harvested from the file header and not manually   |
|               | input.                                               |
|               |                                                      |
|               | *Examples:*                                          |
|               |                                                      |
|               | YYYY:MM:DD HH:MM:SS, with hours 0-24, a space        |
|               | character between the date and time, and a null      |
|               | termination byte                                     |
|               |                                                      |
|               | YYYY:MM:DD                                           |
|               |                                                      |
|               | YYYY:MM                                              |
|               |                                                      |
|               | YYYY                                                 |
|               |                                                      |
|               | [This field should never be changed after it is      |
|               | written in the image capture device]{.underline}     |
+---------------+------------------------------------------------------+
| Enumerated    | a string that may only contain one of a number of    |
| type          | values as specified by an existing external standard |
|               |                                                      |
| (restricted   |                                                      |
| to external   |                                                      |
| standard)     |                                                      |
+---------------+------------------------------------------------------+
| Enumerated    | a string that may only contain one of a number of    |
| type          | values listed. Such lists can be implemented and     |
|               | regulated on an institutional basis. This allows for |
| (restricted   | quick adoption of new values when technology         |
| to list)      | changes.                                             |
+---------------+------------------------------------------------------+
| Non-negative  | a real where r ≥ 0                                   |
| real          |                                                      |
+---------------+------------------------------------------------------+
| Positive      | an integer where i \> 0                              |
| integer       |                                                      |
+---------------+------------------------------------------------------+
| Real          | a real number where r may be \<0                     |
+---------------+------------------------------------------------------+
| Reference     | a single pointer to another object                   |
+---------------+------------------------------------------------------+
| String        | one or more characters                               |
+---------------+------------------------------------------------------+

### Documentation

Each field contains the following documentation:

\[**Field Number, "tag"**\]

+----------+-----------------------------------------------------------+
| #####    | definition in italics                                     |
| ### Defi |                                                           |
| nition { |                                                           |
| #definit |                                                           |
| ion .unn |                                                           |
| umbered} |                                                           |
+----------+-----------------------------------------------------------+
| #        | specification allowable data type(s) (see Section 1.6.2)  |
| #######  |                                                           |
| Type {#t |                                                           |
| ype .unn |                                                           |
| umbered} |                                                           |
+----------+-----------------------------------------------------------+
| **Re     | M = mandatory                                             |
| quired** |                                                           |
|          | MA = mandatory if applicable                              |
|          |                                                           |
|          | R = Recommended                                           |
|          |                                                           |
|          | O = optional                                              |
+----------+-----------------------------------------------------------+
| **Repe   | Y = yes                                                   |
| atable** |                                                           |
|          | N = no                                                    |
+----------+-----------------------------------------------------------+
| #####    | When data type = "enumerated type," values listed are     |
| ### Valu | actual values.                                            |
| es {#val |                                                           |
| ues .unn | When data type = "string," examples are provided          |
| umbered} |                                                           |
|          |                                                           |
| (E       |                                                           |
| xamples) |                                                           |
+----------+-----------------------------------------------------------+
| #######  | A comments field, including pointers to related           |
| # Notes  | documentation.                                            |
| [or]{.un |                                                           |
| derline} | "Usage Notes" provide additional information about        |
|  {#notes | examples.                                                 |
| -or .unn |                                                           |
| umbered} |                                                           |
|          |                                                           |
| #######  |                                                           |
| # Usage  |                                                           |
| Notes {# |                                                           |
| usage-no |                                                           |
| tes .unn |                                                           |
| umbered} |                                                           |
+----------+-----------------------------------------------------------+
| **Use**  | System                                                    |
|          |                                                           |
|          | Manager (curator, repository manager, imaging expert)     |
|          |                                                           |
|          | User (end user)                                           |
+----------+-----------------------------------------------------------+

# Basic Image Parameters

The items in this section are fundamental to the reconstruction of the
digital file as a viewable image on electronically interfaced displays.
It makes no presumption about the rendered or spatial accuracy of the
displayed image, only that a reasonably appearing image can be
reconstructed using these elements. Elements for efficient and
convenient image display management are provided under *Segments 2.1.5.*

##  Format 

### MIMEType

+----------+------------+----------------------------------------------+
| De       | *D         |                                              |
| finition | esignation |                                              |
|          | of the     |                                              |
|          | Mu         |                                              |
|          | ltipurpose |                                              |
|          | Internet   |                                              |
|          | Mail       |                                              |
|          | Extensions |                                              |
|          | (MIME)     |                                              |
|          | type       |                                              |
|          | associated |                                              |
|          | with the   |                                              |
|          | image      |                                              |
|          | data.*     |                                              |
+----------+------------+----------------------------------------------+
| Type     | enumerated |                                              |
|          | type       |                                              |
|          | (          |                                              |
|          | restricted |                                              |
|          | to         |                                              |
|          | external   |                                              |
|          | standard)  |                                              |
+----------+------------+----------------------------------------------+
| Required | R          |                                              |
+----------+------------+----------------------------------------------+
| Re       | N          |                                              |
| peatable |            |                                              |
+----------+------------+----------------------------------------------+
| Values   | image/gif  | = GIF                                        |
|          |            |                                              |
| (E       | image/jpeg | = JPEG                                       |
| xamples) |            |                                              |
|          | image/tiff | = TIFF                                       |
|          |            |                                              |
|          | i          | = PCD                                        |
|          | mage/x-pcd |                                              |
|          |            | = PDF                                        |
|          | appli      |                                              |
|          | cation/pdf |                                              |
+----------+------------+----------------------------------------------+
| Notes    | The values |                                              |
|          | listed     |                                              |
|          | above      |                                              |
|          | represent  |                                              |
|          | MIME types |                                              |
|          | for        |                                              |
|          | digital    |                                              |
|          | still      |                                              |
|          | image      |                                              |
|          | formats    |                                              |
|          | commonly   |                                              |
|          | used in    |                                              |
|          | library    |                                              |
|          | and museum |                                              |
|          | digital    |                                              |
|          | re         |                                              |
|          | formatting |                                              |
|          | in         |                                              |
|          | itiatives. |                                              |
|          | The x-     |                                              |
|          | convention |                                              |
|          | is used to |                                              |
|          | construct  |                                              |
|          | an         |                                              |
|          | unofficial |                                              |
|          | type for   |                                              |
|          | any image  |                                              |
|          | format     |                                              |
|          | lacking a  |                                              |
|          | formally   |                                              |
|          | registered |                                              |
|          | MIME type. |                                              |
|          | See        |                                              |
|          | <http://   |                                              |
|          | www.mime-t |                                              |
|          | ypes.com/> |                                              |
|          | for an     |                                              |
|          | up-to-date |                                              |
|          | list of    |                                              |
|          | formally   |                                              |
|          | registered |                                              |
|          | MIME       |                                              |
|          | types.     |                                              |
+----------+------------+----------------------------------------------+
| Use      | System     |                                              |
+----------+------------+----------------------------------------------+

### ByteOrder

+----------+------------+----------------------------------------------+
| De       | *          |                                              |
| finition | Designates |                                              |
|          | the byte   |                                              |
|          | order in   |                                              |
|          | multi-byte |                                              |
|          | numbers    |                                              |
|          | are        |                                              |
|          | stored*    |                                              |
+----------+------------+----------------------------------------------+
| Type     | enumerated |                                              |
|          | type       |                                              |
|          | (          |                                              |
|          | restricted |                                              |
|          | to list)   |                                              |
+----------+------------+----------------------------------------------+
| Required | R          |                                              |
+----------+------------+----------------------------------------------+
| Re       | N          |                                              |
| peatable |            |                                              |
+----------+------------+----------------------------------------------+
| Values   | big-endian |                                              |
|          |            |                                              |
|          | lit        |                                              |
|          | tle_endian |                                              |
+----------+------------+----------------------------------------------+
| Notes    | Virtually  |                                              |
|          | all        |                                              |
|          | computer   |                                              |
|          | arc        |                                              |
|          | hitectures |                                              |
|          | are byte   |                                              |
|          | ad         |                                              |
|          | dressable. |                                              |
|          | The bytes  |                                              |
|          | of a       |                                              |
|          | multi-byte |                                              |
|          | data value |                                              |
|          | can be     |                                              |
|          | stored in  |                                              |
|          | memory in  |                                              |
|          | different  |                                              |
|          | orders.    |                                              |
|          | \"Littl    |                                              |
|          | e_endian\" |                                              |
|          | means that |                                              |
|          | the        |                                              |
|          | low-order  |                                              |
|          | byte of    |                                              |
|          | the number |                                              |
|          | is stored  |                                              |
|          | in memory  |                                              |
|          | at the     |                                              |
|          | lowest     |                                              |
|          | address,   |                                              |
|          | and the    |                                              |
|          | high-order |                                              |
|          | byte at    |                                              |
|          | the        |                                              |
|          | highest    |                                              |
|          | address.   |                                              |
|          | "Bi        |                                              |
|          | g_endian\" |                                              |
|          | means that |                                              |
|          | the        |                                              |
|          | high-order |                                              |
|          | byte of    |                                              |
|          | the number |                                              |
|          | is stored  |                                              |
|          | in memory  |                                              |
|          | at the     |                                              |
|          | lowest     |                                              |
|          | address,   |                                              |
|          | and the    |                                              |
|          | low-order  |                                              |
|          | byte at    |                                              |
|          | the        |                                              |
|          | highest    |                                              |
|          | address.   |                                              |
+----------+------------+----------------------------------------------+
| Use      | System     |                                              |
+----------+------------+----------------------------------------------+

### Compression

#### CompressionScheme

+----------+------+----------------------------------------------------+
| De       | *De  |                                                    |
| finition | sign |                                                    |
|          | ates |                                                    |
|          | the  |                                                    |
|          | com  |                                                    |
|          | pres |                                                    |
|          | sion |                                                    |
|          | sc   |                                                    |
|          | heme |                                                    |
|          | used |                                                    |
|          | to   |                                                    |
|          | s    |                                                    |
|          | tore |                                                    |
|          | the  |                                                    |
|          | i    |                                                    |
|          | mage |                                                    |
|          | da   |                                                    |
|          | ta.* |                                                    |
+----------+------+----------------------------------------------------+
| Type     | en   |                                                    |
|          | umer |                                                    |
|          | ated |                                                    |
|          | type |                                                    |
|          | (re  |                                                    |
|          | stri |                                                    |
|          | cted |                                                    |
|          | to   |                                                    |
|          | l    |                                                    |
|          | ist) |                                                    |
+----------+------+----------------------------------------------------+
| Required | M    |                                                    |
+----------+------+----------------------------------------------------+
| Re       | N    |                                                    |
| peatable |      |                                                    |
+----------+------+----------------------------------------------------+
| Values   | 1    | = Uncompressed                                     |
|          |      |                                                    |
|          | 2    | = CCITT 1D                                         |
|          |      |                                                    |
|          | 3    | = CCITT Group 3                                    |
|          |      |                                                    |
|          | 4    | = CCITT Group 4                                    |
|          |      |                                                    |
|          | 5    | = LZW                                              |
|          |      |                                                    |
|          | 6    | = JPEG                                             |
|          |      |                                                    |
|          | 3    | = PackBits (simple byte-oriented run-length        |
|          | 2773 | scheme)                                            |
+----------+------+----------------------------------------------------+
| Usage    | Va   |                                                    |
| Notes    | lues |                                                    |
|          | a    |                                                    |
|          | bove |                                                    |
|          | are  |                                                    |
|          | d    |                                                    |
|          | rawn |                                                    |
|          | from |                                                    |
|          | TIFF |                                                    |
|          | 6.0  |                                                    |
|          | s    |                                                    |
|          | peci |                                                    |
|          | fica |                                                    |
|          | tion |                                                    |
|          | (p   |                                                    |
|          | 117) |                                                    |
|          | th   |                                                    |
|          | ough |                                                    |
|          | inst |                                                    |
|          | itut |                                                    |
|          | ions |                                                    |
|          | are  |                                                    |
|          | en   |                                                    |
|          | cour |                                                    |
|          | aged |                                                    |
|          | to   |                                                    |
|          | de   |                                                    |
|          | vise |                                                    |
|          | a    |                                                    |
|          | l    |                                                    |
|          | ocal |                                                    |
|          | en   |                                                    |
|          | umer |                                                    |
|          | ated |                                                    |
|          | list |                                                    |
|          | to   |                                                    |
|          | a    |                                                    |
|          | llow |                                                    |
|          | for  |                                                    |
|          | the  |                                                    |
|          | addi |                                                    |
|          | tion |                                                    |
|          | of   |                                                    |
|          | new  |                                                    |
|          | va   |                                                    |
|          | lues |                                                    |
|          | as   |                                                    |
|          | te   |                                                    |
|          | chno |                                                    |
|          | logy |                                                    |
|          | chan |                                                    |
|          | ges. |                                                    |
|          | This |                                                    |
|          | data |                                                    |
|          | ele  |                                                    |
|          | ment |                                                    |
|          | al   |                                                    |
|          | lows |                                                    |
|          | for  |                                                    |
|          | the  |                                                    |
|          | des  |                                                    |
|          | igna |                                                    |
|          | tion |                                                    |
|          | of   |                                                    |
|          | sub  |                                                    |
|          | elem |                                                    |
|          | ents |                                                    |
|          | in   |                                                    |
|          | o    |                                                    |
|          | rder |                                                    |
|          | to   |                                                    |
|          | re   |                                                    |
|          | cord |                                                    |
|          | the  |                                                    |
|          | l    |                                                    |
|          | evel |                                                    |
|          | of   |                                                    |
|          | com  |                                                    |
|          | pres |                                                    |
|          | sion |                                                    |
|          | appl |                                                    |
|          | ied. |                                                    |
|          | See  |                                                    |
|          | 2.1  |                                                    |
|          | .3.2 |                                                    |
|          | *    |                                                    |
|          | *Com |                                                    |
|          | pres |                                                    |
|          | sion |                                                    |
|          | Leve |                                                    |
|          | l**. |                                                    |
+----------+------+----------------------------------------------------+
| Use      | Sy   |                                                    |
|          | stem |                                                    |
+----------+------+----------------------------------------------------+

#### CompressionLevel

+----------+------+----------------------------------------------------+
| De       | *De  |                                                    |
| finition | sign |                                                    |
|          | ates |                                                    |
|          | the  |                                                    |
|          | l    |                                                    |
|          | evel |                                                    |
|          | of   |                                                    |
|          | com  |                                                    |
|          | pres |                                                    |
|          | sion |                                                    |
|          | used |                                                    |
|          | in   |                                                    |
|          | 2    |                                                    |
|          | .1.3 |                                                    |
|          | .1.* |                                                    |
+----------+------+----------------------------------------------------+
| Type     | Posi |                                                    |
|          | tive |                                                    |
|          | int  |                                                    |
|          | eger |                                                    |
+----------+------+----------------------------------------------------+
| Required | MA   |                                                    |
+----------+------+----------------------------------------------------+
| Re       | N    |                                                    |
| peatable |      |                                                    |
+----------+------+----------------------------------------------------+
| Values   | 10   |                                                    |
|          |      |                                                    |
| (E       | 30   |                                                    |
| xamples) |      |                                                    |
+----------+------+----------------------------------------------------+
| Notes    |      |                                                    |
+----------+------+----------------------------------------------------+
| Use      | Sy   |                                                    |
|          | stem |                                                    |
+----------+------+----------------------------------------------------+

### PhotometricInterpretation

#### ColorSpace

+----------+---+--------------------------------------------------------+
| De       | * |                                                        |
| finition | D |                                                        |
|          | e |                                                        |
|          | s |                                                        |
|          | i |                                                        |
|          | g |                                                        |
|          | n |                                                        |
|          | a |                                                        |
|          | t |                                                        |
|          | e |                                                        |
|          | s |                                                        |
|          | t |                                                        |
|          | h |                                                        |
|          | e |                                                        |
|          | c |                                                        |
|          | o |                                                        |
|          | l |                                                        |
|          | o |                                                        |
|          | r |                                                        |
|          | s |                                                        |
|          | p |                                                        |
|          | a |                                                        |
|          | c |                                                        |
|          | e |                                                        |
|          | o |                                                        |
|          | f |                                                        |
|          | t |                                                        |
|          | h |                                                        |
|          | e |                                                        |
|          | d |                                                        |
|          | e |                                                        |
|          | c |                                                        |
|          | o |                                                        |
|          | m |                                                        |
|          | p |                                                        |
|          | r |                                                        |
|          | e |                                                        |
|          | s |                                                        |
|          | s |                                                        |
|          | e |                                                        |
|          | d |                                                        |
|          | i |                                                        |
|          | m |                                                        |
|          | a |                                                        |
|          | g |                                                        |
|          | e |                                                        |
|          | d |                                                        |
|          | a |                                                        |
|          | t |                                                        |
|          | a |                                                        |
|          | . |                                                        |
|          | * |                                                        |
+----------+---+--------------------------------------------------------+
| Type     | e |                                                        |
|          | n |                                                        |
|          | u |                                                        |
|          | m |                                                        |
|          | e |                                                        |
|          | r |                                                        |
|          | a |                                                        |
|          | t |                                                        |
|          | e |                                                        |
|          | d |                                                        |
|          | t |                                                        |
|          | y |                                                        |
|          | p |                                                        |
|          | e |                                                        |
|          | ( |                                                        |
|          | r |                                                        |
|          | e |                                                        |
|          | s |                                                        |
|          | t |                                                        |
|          | r |                                                        |
|          | i |                                                        |
|          | c |                                                        |
|          | t |                                                        |
|          | e |                                                        |
|          | d |                                                        |
|          | t |                                                        |
|          | o |                                                        |
|          | e |                                                        |
|          | x |                                                        |
|          | t |                                                        |
|          | e |                                                        |
|          | r |                                                        |
|          | n |                                                        |
|          | a |                                                        |
|          | l |                                                        |
|          | s |                                                        |
|          | t |                                                        |
|          | a |                                                        |
|          | n |                                                        |
|          | d |                                                        |
|          | a |                                                        |
|          | r |                                                        |
|          | d |                                                        |
|          | ) |                                                        |
+----------+---+--------------------------------------------------------+
| Required | M |                                                        |
+----------+---+--------------------------------------------------------+
| Re       | N |                                                        |
| peatable |   |                                                        |
+----------+---+--------------------------------------------------------+
| Values   | 0 | WhiteIsZero. For bilevel and grayscale images: 0 is    |
|          | = | imaged as white. 2\*\*BitsPerSample-1 is imaged as     |
|          |   | black. This is the normal value for Compression=2.     |
|          | 1 |                                                        |
|          | = | BlackIsZero. For bilevel and grayscale images: 0 is    |
|          |   | imaged as black. 2\*\*BitsPerSample-1 is imaged as     |
|          | 2 | white. If this value is specified for Compression=2,   |
|          | = | the image should display and print reversed.           |
|          |   |                                                        |
|          | 3 | RGB. In the RGB model, a color is described as a       |
|          | = | combination of the three primary colors of light (red, |
|          |   | green, and blue) in particular concentrations. For     |
|          | 4 | each of the three components, 0 represents minimum     |
|          | = | intensity, and 2\*\***BitsPerSample** - 1 represents   |
|          |   | maximum intensity. Thus an RGB value of (0,0,0)        |
|          | 5 | represents black, and (255,255,255) represents white,  |
|          | = | assuming 8-bit components. For **PlanarConfiguration** |
|          |   | = 1, the components are stored in the indicated order: |
|          | 6 | first Red, then Green, then Blue. For                  |
|          | = | **PlanarConfiguration** = 2, the **StripOffsets** for  |
|          |   | the component planes are stored in the indicated       |
|          | 8 | order: first the Red component plane **StripOffsets**, |
|          | = | then the Green plane **StripOffsets**, then the Blue   |
|          |   | plane **StripOffsets**.                                |
|          |   |                                                        |
|          |   | Palette color. In this model, a color is described     |
|          |   | with a single component. The value of the component is |
|          |   | used as an index into the red, green and blue curves   |
|          |   | in the **ColorMap** field to retrieve an RGB triplet   |
|          |   | that defines the color. When                           |
|          |   | **PhotometricInterpretation**=3 is used, **ColorMap**  |
|          |   | must be present and **SamplesPerPixel** must be 1.     |
|          |   |                                                        |
|          |   | Transparency Mask. This means that the image is used   |
|          |   | to define an irregularly shaped region of another      |
|          |   | image in the same TIFF file. **SamplesPerPixel** and   |
|          |   | **BitsPerSample** must be 1. PackBits compression is   |
|          |   | recommended. The 1-bits define the interior of the     |
|          |   | region; the 0-bits define the exterior of the region.  |
|          |   |                                                        |
|          |   | CMYK                                                   |
|          |   |                                                        |
|          |   | YC~b~C~r~                                              |
|          |   |                                                        |
|          |   | CIELab                                                 |
+----------+---+--------------------------------------------------------+
| Notes    | N |                                                        |
|          | o |                                                        |
|          | t |                                                        |
|          | e |                                                        |
|          | : |                                                        |
|          | w |                                                        |
|          | h |                                                        |
|          | e |                                                        |
|          | n |                                                        |
|          | * |                                                        |
|          | * |                                                        |
|          | P |                                                        |
|          | h |                                                        |
|          | o |                                                        |
|          | t |                                                        |
|          | o |                                                        |
|          | m |                                                        |
|          | e |                                                        |
|          | t |                                                        |
|          | r |                                                        |
|          | i |                                                        |
|          | c |                                                        |
|          | I |                                                        |
|          | n |                                                        |
|          | t |                                                        |
|          | e |                                                        |
|          | r |                                                        |
|          | p |                                                        |
|          | r |                                                        |
|          | e |                                                        |
|          | t |                                                        |
|          | a |                                                        |
|          | t |                                                        |
|          | i |                                                        |
|          | o |                                                        |
|          | n |                                                        |
|          | * |                                                        |
|          | * |                                                        |
|          | = |                                                        |
|          | 6 |                                                        |
|          | , |                                                        |
|          | T |                                                        |
|          | I |                                                        |
|          | F |                                                        |
|          | F |                                                        |
|          | / |                                                        |
|          | E |                                                        |
|          | P |                                                        |
|          | r |                                                        |
|          | e |                                                        |
|          | q |                                                        |
|          | u |                                                        |
|          | i |                                                        |
|          | r |                                                        |
|          | e |                                                        |
|          | s |                                                        |
|          | u |                                                        |
|          | s |                                                        |
|          | e |                                                        |
|          | o |                                                        |
|          | f |                                                        |
|          | t |                                                        |
|          | h |                                                        |
|          | e |                                                        |
|          | f |                                                        |
|          | o |                                                        |
|          | l |                                                        |
|          | l |                                                        |
|          | o |                                                        |
|          | w |                                                        |
|          | i |                                                        |
|          | n |                                                        |
|          | g |                                                        |
|          | f |                                                        |
|          | o |                                                        |
|          | u |                                                        |
|          | r |                                                        |
|          | t |                                                        |
|          | a |                                                        |
|          | g |                                                        |
|          | s |                                                        |
|          | ( |                                                        |
|          | w |                                                        |
|          | h |                                                        |
|          | i |                                                        |
|          | c |                                                        |
|          | h |                                                        |
|          | a |                                                        |
|          | r |                                                        |
|          | e |                                                        |
|          | n |                                                        |
|          | o |                                                        |
|          | t |                                                        |
|          | c |                                                        |
|          | o |                                                        |
|          | v |                                                        |
|          | e |                                                        |
|          | r |                                                        |
|          | e |                                                        |
|          | d |                                                        |
|          | i |                                                        |
|          | n |                                                        |
|          | t |                                                        |
|          | h |                                                        |
|          | i |                                                        |
|          | s |                                                        |
|          | s |                                                        |
|          | p |                                                        |
|          | e |                                                        |
|          | c |                                                        |
|          | i |                                                        |
|          | f |                                                        |
|          | i |                                                        |
|          | c |                                                        |
|          | a |                                                        |
|          | t |                                                        |
|          | i |                                                        |
|          | o |                                                        |
|          | n |                                                        |
|          | ) |                                                        |
|          | : |                                                        |
|          | 5 |                                                        |
|          | 3 |                                                        |
|          | 0 |                                                        |
|          | * |                                                        |
|          | * |                                                        |
|          | Y |                                                        |
|          | C |                                                        |
|          | b |                                                        |
|          | C |                                                        |
|          | r |                                                        |
|          | S |                                                        |
|          | u |                                                        |
|          | b |                                                        |
|          | S |                                                        |
|          | a |                                                        |
|          | m |                                                        |
|          | p |                                                        |
|          | l |                                                        |
|          | i |                                                        |
|          | n |                                                        |
|          | g |                                                        |
|          | * |                                                        |
|          | * |                                                        |
|          | , |                                                        |
|          | 5 |                                                        |
|          | 3 |                                                        |
|          | 1 |                                                        |
|          | * |                                                        |
|          | * |                                                        |
|          | Y |                                                        |
|          | C |                                                        |
|          | b |                                                        |
|          | C |                                                        |
|          | r |                                                        |
|          | P |                                                        |
|          | o |                                                        |
|          | s |                                                        |
|          | i |                                                        |
|          | t |                                                        |
|          | i |                                                        |
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|          | n |                                                        |
|          | i |                                                        |
|          | n |                                                        |
|          | g |                                                        |
|          | * |                                                        |
|          | * |                                                        |
|          | , |                                                        |
|          | 5 |                                                        |
|          | 2 |                                                        |
|          | 9 |                                                        |
|          | , |                                                        |
|          | * |                                                        |
|          | * |                                                        |
|          | Y |                                                        |
|          | c |                                                        |
|          | b |                                                        |
|          | C |                                                        |
|          | r |                                                        |
|          | C |                                                        |
|          | o |                                                        |
|          | e |                                                        |
|          | f |                                                        |
|          | f |                                                        |
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|          | c |                                                        |
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|          | n |                                                        |
|          | t |                                                        |
|          | s |                                                        |
|          | * |                                                        |
|          | * |                                                        |
|          | , |                                                        |
|          | 5 |                                                        |
|          | 3 |                                                        |
|          | 2 |                                                        |
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|          | * |                                                        |
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|          | e |                                                        |
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|          | r |                                                        |
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|          | n |                                                        |
|          | c |                                                        |
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|          | l |                                                        |
|          | a |                                                        |
|          | c |                                                        |
|          | k |                                                        |
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|          | . |                                                        |
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|          | * |                                                        |
|          | U |                                                        |
|          | s |                                                        |
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|          | * |                                                        |
|          | * |                                                        |
|          | 2 |                                                        |
|          | . |                                                        |
|          | 1 |                                                        |
|          | . |                                                        |
|          | 4 |                                                        |
|          | . |                                                        |
|          | 3 |                                                        |
|          | - |                                                        |
|          | - |                                                        |
|          | 2 |                                                        |
|          | . |                                                        |
|          | 1 |                                                        |
|          | . |                                                        |
|          | 4 |                                                        |
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|          | 6 |                                                        |
|          | * |                                                        |
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|          | t |                                                        |
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|          | r |                                                        |
|          | d |                                                        |
|          | t |                                                        |
|          | h |                                                        |
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|          | s |                                                        |
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|          | v |                                                        |
|          | a |                                                        |
|          | l |                                                        |
|          | u |                                                        |
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|          | s |                                                        |
|          | . |                                                        |
|          |   |                                                        |
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|          | F |                                                        |
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|          | 2 |                                                        |
|          | 1 |                                                        |
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|          | C |                                                        |
|          | b |                                                        |
|          | C |                                                        |
|          | r |                                                        |
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|          | m |                                                        |
|          | a |                                                        |
|          | g |                                                        |
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|          | a |                                                        |
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|          | d |                                                        |
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|          | I |                                                        |
|          | S |                                                        |
|          | O |                                                        |
|          | / |                                                        |
|          | T |                                                        |
|          | C |                                                        |
|          | 4 |                                                        |
|          | 2 |                                                        |
|          | N |                                                        |
|          | 4 |                                                        |
|          | 3 |                                                        |
|          | 7 |                                                        |
|          | 8 |                                                        |
|          | T |                                                        |
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|          | F |                                                        |
|          | F |                                                        |
|          | / |                                                        |
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|          | s |                                                        |
|          | t |                                                        |
|          | a |                                                        |
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|          | d |                                                        |
|          | a |                                                        |
|          | r |                                                        |
|          | d |                                                        |
|          | , |                                                        |
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|          | t |                                                        |
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|          | o |                                                        |
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|          | 5 |                                                        |
|          |   |                                                        |
|          | - |                                                        |
|          | T |                                                        |
|          | I |                                                        |
|          | F |                                                        |
|          | F |                                                        |
|          | / |                                                        |
|          | E |                                                        |
|          | P |                                                        |
|          | T |                                                        |
|          | a |                                                        |
|          | g |                                                        |
|          | d |                                                        |
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|          | f |                                                        |
|          | i |                                                        |
|          | n |                                                        |
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|          | t |                                                        |
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|          | s |                                                        |
|          | * |                                                        |
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|          | d |                                                        |
|          | d |                                                        |
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|          | i |                                                        |
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|          | d |                                                        |
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|          | F |                                                        |
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|          | a |                                                        |
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|          | m |                                                        |
|          | a |                                                        |
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|          | s |                                                        |
|          | . |                                                        |
+----------+---+--------------------------------------------------------+
| Use      | S |                                                        |
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|          | * |                                                        |
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|          | n |                                                        |
|          | t |                                                        |
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|          | a |                                                        |
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|          | m |                                                        |
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|          | a |                                                        |
|          | l |                                                        |
|          | i |                                                        |
|          | t |                                                        |
|          | y |                                                        |
+----------+---+--------------------------------------------------------+

####  ICCProfile

2.1.4.2.1 **ProfileName**

  ------------ ----------------- ----------------------------------------------------
  Definition   *Designates the   
               well-defined name 
               of the ICC        
               profile used.*    

  Type         string            

  Required     MA                

  Repeatable   N                 

  Values                         

  Usage Notes  If ICC profile    
               used is a         
               well-known and    
               well-documented   
               profile, record   
               the information   
               in this data      
               element. If not,  
               record the        
               location of where 
               the profile can   
               be found in       
               2.1.4.2.2         
               **ProfileURL.**   

  Use          System            
  ------------ ----------------- ----------------------------------------------------

2.1.4.2.2 **ProfileURL**

  ------------ ------------------ ----------------------------------------------------
  Definition   *Designates the    
               URL/URN where the  
               ICC profile is     
               located.*          

  Type         string             

  Required     MA                 

  Repeatable   N                  

  Values                          

  Usage Notes  If ICC profile     
               used is a          
               well-known and     
               well-documented    
               profile, record    
               the information in 
               2.1.4.2.1.         
               **ProfileName**.   
               If not, record the 
               location of where  
               the profile can be 
               found in this data 
               element**.**       

  Use          System             
  ------------ ------------------ ----------------------------------------------------

#### YCbCrSubSampling

+----------+---+--------------------------------------------------------+
| De       | * |                                                        |
| finition | D |                                                        |
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+----------+---+--------------------------------------------------------+
| Type     | e |                                                        |
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|          | d |                                                        |
|          | ) |                                                        |
+----------+---+--------------------------------------------------------+
| Required | M |                                                        |
|          | A |                                                        |
+----------+---+--------------------------------------------------------+
| Re       | N |                                                        |
| peatable |   |                                                        |
+----------+---+--------------------------------------------------------+
| Values   |   |                                                        |
+----------+---+--------------------------------------------------------+
| Usage    | S |                                                        |
| Notes    | e |                                                        |
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|          | 3 |                                                        |
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|          | 8 |                                                        |
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|          | d |                                                        |
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|          | f |                                                        |
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|          | a |                                                        |
|          | t |                                                        |
|          | i |                                                        |
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|          | r |                                                        |
|          | e |                                                        |
|          | g |                                                        |
|          | a |                                                        |
|          | r |                                                        |
|          | d |                                                        |
|          | i |                                                        |
|          | n |                                                        |
|          | g |                                                        |
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|          | F |                                                        |
|          | F |                                                        |
|          | Y |                                                        |
|          | c |                                                        |
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|          | C |                                                        |
|          | r |                                                        |
|          | ( |                                                        |
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|          | l |                                                        |
|          | a |                                                        |
|          | s |                                                        |
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|          | * |                                                        |
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|          | i |                                                        |
|          | m |                                                        |
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|          | s |                                                        |
|          | . |                                                        |
+----------+---+--------------------------------------------------------+
| Use      | S |                                                        |
|          | y |                                                        |
|          | s |                                                        |
|          | t |                                                        |
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|          | m |                                                        |
|          | ( |                                                        |
|          | * |                                                        |
|          | t |                                                        |
|          | o |                                                        |
|          | n |                                                        |
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|          | c |                                                        |
|          | o |                                                        |
|          | l |                                                        |
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|          | r |                                                        |
|          | * |                                                        |
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|          |   |                                                        |
|          | M |                                                        |
|          | a |                                                        |
|          | n |                                                        |
|          | a |                                                        |
|          | g |                                                        |
|          | e |                                                        |
|          | r |                                                        |
|          | , |                                                        |
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|          | n |                                                        |
|          | e |                                                        |
|          | o |                                                        |
|          | f |                                                        |
|          | t |                                                        |
|          | h |                                                        |
|          | e |                                                        |
|          | q |                                                        |
|          | u |                                                        |
|          | a |                                                        |
|          | n |                                                        |
|          | t |                                                        |
|          | i |                                                        |
|          | t |                                                        |
|          | a |                                                        |
|          | t |                                                        |
|          | i |                                                        |
|          | v |                                                        |
|          | e |                                                        |
|          | m |                                                        |
|          | e |                                                        |
|          | t |                                                        |
|          | r |                                                        |
|          | i |                                                        |
|          | c |                                                        |
|          | s |                                                        |
|          | t |                                                        |
|          | o |                                                        |
|          | e |                                                        |
|          | v |                                                        |
|          | a |                                                        |
|          | l |                                                        |
|          | u |                                                        |
|          | a |                                                        |
|          | t |                                                        |
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|          | m |                                                        |
|          | a |                                                        |
|          | g |                                                        |
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|          | a |                                                        |
|          | l |                                                        |
|          | i |                                                        |
|          | t |                                                        |
|          | y |                                                        |
+----------+---+--------------------------------------------------------+

#### YCbCrPositioning

+----------+---+--------------------------------------------------------+
| De       | * |                                                        |
| finition | D |                                                        |
|          | e |                                                        |
|          | s |                                                        |
|          | i |                                                        |
|          | g |                                                        |
|          | n |                                                        |
|          | a |                                                        |
|          | t |                                                        |
|          | e |                                                        |
|          | s |                                                        |
|          | t |                                                        |
|          | h |                                                        |
|          | e |                                                        |
|          | * |                                                        |
|          | p |                                                        |
|          | o |                                                        |
|          | s |                                                        |
|          | i |                                                        |
|          | t |                                                        |
|          | i |                                                        |
|          | o |                                                        |
|          | n |                                                        |
|          | s |                                                        |
|          | o |                                                        |
|          | f |                                                        |
|          | s |                                                        |
|          | u |                                                        |
|          | b |                                                        |
|          | s |                                                        |
|          | a |                                                        |
|          | m |                                                        |
|          | p |                                                        |
|          | l |                                                        |
|          | e |                                                        |
|          | d |                                                        |
|          | c |                                                        |
|          | h |                                                        |
|          | r |                                                        |
|          | o |                                                        |
|          | m |                                                        |
|          | i |                                                        |
|          | n |                                                        |
|          | a |                                                        |
|          | n |                                                        |
|          | c |                                                        |
|          | e |                                                        |
|          | c |                                                        |
|          | o |                                                        |
|          | m |                                                        |
|          | p |                                                        |
|          | o |                                                        |
|          | n |                                                        |
|          | e |                                                        |
|          | n |                                                        |
|          | t |                                                        |
|          | s |                                                        |
|          | r |                                                        |
|          | e |                                                        |
|          | l |                                                        |
|          | a |                                                        |
|          | t |                                                        |
|          | i |                                                        |
|          | v |                                                        |
|          | e |                                                        |
|          | t |                                                        |
|          | o |                                                        |
|          | l |                                                        |
|          | u |                                                        |
|          | m |                                                        |
|          | i |                                                        |
|          | n |                                                        |
|          | a |                                                        |
|          | n |                                                        |
|          | c |                                                        |
|          | e |                                                        |
|          | s |                                                        |
|          | a |                                                        |
|          | m |                                                        |
|          | p |                                                        |
|          | l |                                                        |
|          | e |                                                        |
|          | s |                                                        |
|          | . |                                                        |
|          | T |                                                        |
|          | h |                                                        |
|          | i |                                                        |
|          | s |                                                        |
|          | t |                                                        |
|          | a |                                                        |
|          | g |                                                        |
|          | i |                                                        |
|          | s |                                                        |
|          | m |                                                        |
|          | a |                                                        |
|          | n |                                                        |
|          | d |                                                        |
|          | a |                                                        |
|          | t |                                                        |
|          | o |                                                        |
|          | r |                                                        |
|          | y |                                                        |
|          | w |                                                        |
|          | h |                                                        |
|          | e |                                                        |
|          | n |                                                        |
|          | * |                                                        |
|          | * |                                                        |
|          | P |                                                        |
|          | h |                                                        |
|          | o |                                                        |
|          | t |                                                        |
|          | o |                                                        |
|          | m |                                                        |
|          | e |                                                        |
|          | t |                                                        |
|          | r |                                                        |
|          | i |                                                        |
|          | c |                                                        |
|          | I |                                                        |
|          | n |                                                        |
|          | t |                                                        |
|          | e |                                                        |
|          | r |                                                        |
|          | p |                                                        |
|          | r |                                                        |
|          | e |                                                        |
|          | t |                                                        |
|          | a |                                                        |
|          | t |                                                        |
|          | i |                                                        |
|          | o |                                                        |
|          | n |                                                        |
|          | * |                                                        |
|          | * |                                                        |
|          | = |                                                        |
|          | 6 |                                                        |
|          | , |                                                        |
|          | a |                                                        |
|          | n |                                                        |
|          | d |                                                        |
|          | t |                                                        |
|          | h |                                                        |
|          | e |                                                        |
|          | v |                                                        |
|          | a |                                                        |
|          | l |                                                        |
|          | u |                                                        |
|          | e |                                                        |
|          | s |                                                        |
|          | h |                                                        |
|          | a |                                                        |
|          | l |                                                        |
|          | l |                                                        |
|          | e |                                                        |
|          | q |                                                        |
|          | u |                                                        |
|          | a |                                                        |
|          | l |                                                        |
|          | 2 |                                                        |
|          | . |                                                        |
+----------+---+--------------------------------------------------------+
| Type     | e |                                                        |
|          | n |                                                        |
|          | u |                                                        |
|          | m |                                                        |
|          | e |                                                        |
|          | r |                                                        |
|          | a |                                                        |
|          | t |                                                        |
|          | e |                                                        |
|          | d |                                                        |
|          | t |                                                        |
|          | y |                                                        |
|          | p |                                                        |
|          | e |                                                        |
|          | ( |                                                        |
|          | r |                                                        |
|          | e |                                                        |
|          | s |                                                        |
|          | t |                                                        |
|          | r |                                                        |
|          | i |                                                        |
|          | c |                                                        |
|          | t |                                                        |
|          | e |                                                        |
|          | d |                                                        |
|          | t |                                                        |
|          | o |                                                        |
|          | e |                                                        |
|          | x |                                                        |
|          | t |                                                        |
|          | e |                                                        |
|          | r |                                                        |
|          | n |                                                        |
|          | a |                                                        |
|          | l |                                                        |
|          | s |                                                        |
|          | t |                                                        |
|          | a |                                                        |
|          | n |                                                        |
|          | d |                                                        |
|          | a |                                                        |
|          | r |                                                        |
|          | d |                                                        |
|          | ) |                                                        |
+----------+---+--------------------------------------------------------+
| Required | M |                                                        |
|          | A |                                                        |
+----------+---+--------------------------------------------------------+
| Re       | N |                                                        |
| peatable |   |                                                        |
+----------+---+--------------------------------------------------------+
| Value    | 2 |                                                        |
+----------+---+--------------------------------------------------------+
| Usage    | S |                                                        |
| Notes    | e |                                                        |
|          | e |                                                        |
|          | T |                                                        |
|          | I |                                                        |
|          | F |                                                        |
|          | F |                                                        |
|          | S |                                                        |
|          | e |                                                        |
|          | c |                                                        |
|          | t |                                                        |
|          | i |                                                        |
|          | o |                                                        |
|          | n |                                                        |
|          | 2 |                                                        |
|          | 1 |                                                        |
|          | Y |                                                        |
|          | C |                                                        |
|          | b |                                                        |
|          | C |                                                        |
|          | r |                                                        |
|          | I |                                                        |
|          | m |                                                        |
|          | a |                                                        |
|          | g |                                                        |
|          | e |                                                        |
|          | s |                                                        |
|          | a |                                                        |
|          | n |                                                        |
|          | d |                                                        |
|          | * |                                                        |
|          | * |                                                        |
|          | I |                                                        |
|          | S |                                                        |
|          | O |                                                        |
|          | / |                                                        |
|          | T |                                                        |
|          | C |                                                        |
|          | 4 |                                                        |
|          | 2 |                                                        |
|          | N |                                                        |
|          | 4 |                                                        |
|          | 3 |                                                        |
|          | 7 |                                                        |
|          | 8 |                                                        |
|          | T |                                                        |
|          | I |                                                        |
|          | F |                                                        |
|          | F |                                                        |
|          | / |                                                        |
|          | E |                                                        |
|          | P |                                                        |
|          | s |                                                        |
|          | t |                                                        |
|          | a |                                                        |
|          | n |                                                        |
|          | d |                                                        |
|          | a |                                                        |
|          | r |                                                        |
|          | d |                                                        |
|          | , |                                                        |
|          | S |                                                        |
|          | e |                                                        |
|          | c |                                                        |
|          | t |                                                        |
|          | i |                                                        |
|          | o |                                                        |
|          | n |                                                        |
|          | 5 |                                                        |
|          |   |                                                        |
|          | - |                                                        |
|          | T |                                                        |
|          | I |                                                        |
|          | F |                                                        |
|          | F |                                                        |
|          | / |                                                        |
|          | E |                                                        |
|          | P |                                                        |
|          | T |                                                        |
|          | a |                                                        |
|          | g |                                                        |
|          | d |                                                        |
|          | e |                                                        |
|          | f |                                                        |
|          | i |                                                        |
|          | n |                                                        |
|          | i |                                                        |
|          | t |                                                        |
|          | i |                                                        |
|          | o |                                                        |
|          | n |                                                        |
|          | s |                                                        |
|          | * |                                                        |
|          | * |                                                        |
|          | f |                                                        |
|          | o |                                                        |
|          | r |                                                        |
|          | a |                                                        |
|          | d |                                                        |
|          | d |                                                        |
|          | i |                                                        |
|          | t |                                                        |
|          | i |                                                        |
|          | o |                                                        |
|          | n |                                                        |
|          | a |                                                        |
|          | l |                                                        |
|          | i |                                                        |
|          | n |                                                        |
|          | f |                                                        |
|          | o |                                                        |
|          | r |                                                        |
|          | m |                                                        |
|          | a |                                                        |
|          | t |                                                        |
|          | i |                                                        |
|          | o |                                                        |
|          | n |                                                        |
|          | r |                                                        |
|          | e |                                                        |
|          | g |                                                        |
|          | a |                                                        |
|          | r |                                                        |
|          | d |                                                        |
|          | i |                                                        |
|          | n |                                                        |
|          | g |                                                        |
|          | T |                                                        |
|          | I |                                                        |
|          | F |                                                        |
|          | F |                                                        |
|          | Y |                                                        |
|          | c |                                                        |
|          | b |                                                        |
|          | C |                                                        |
|          | r |                                                        |
|          | ( |                                                        |
|          | * |                                                        |
|          | C |                                                        |
|          | l |                                                        |
|          | a |                                                        |
|          | s |                                                        |
|          | s |                                                        |
|          | Y |                                                        |
|          | * |                                                        |
|          | ) |                                                        |
|          | i |                                                        |
|          | m |                                                        |
|          | a |                                                        |
|          | g |                                                        |
|          | e |                                                        |
|          | s |                                                        |
|          | . |                                                        |
+----------+---+--------------------------------------------------------+
| Use      | S |                                                        |
|          | y |                                                        |
|          | s |                                                        |
|          | t |                                                        |
|          | e |                                                        |
|          | m |                                                        |
|          | ( |                                                        |
|          | * |                                                        |
|          | t |                                                        |
|          | o |                                                        |
|          | n |                                                        |
|          | e |                                                        |
|          | , |                                                        |
|          | c |                                                        |
|          | o |                                                        |
|          | l |                                                        |
|          | o |                                                        |
|          | r |                                                        |
|          | * |                                                        |
|          | ) |                                                        |
|          |   |                                                        |
|          | M |                                                        |
|          | a |                                                        |
|          | n |                                                        |
|          | a |                                                        |
|          | g |                                                        |
|          | e |                                                        |
|          | r |                                                        |
|          | , |                                                        |
|          | o |                                                        |
|          | n |                                                        |
|          | e |                                                        |
|          | o |                                                        |
|          | f |                                                        |
|          | t |                                                        |
|          | h |                                                        |
|          | e |                                                        |
|          | q |                                                        |
|          | u |                                                        |
|          | a |                                                        |
|          | n |                                                        |
|          | t |                                                        |
|          | i |                                                        |
|          | t |                                                        |
|          | a |                                                        |
|          | t |                                                        |
|          | i |                                                        |
|          | v |                                                        |
|          | e |                                                        |
|          | m |                                                        |
|          | e |                                                        |
|          | t |                                                        |
|          | r |                                                        |
|          | i |                                                        |
|          | c |                                                        |
|          | s |                                                        |
|          | t |                                                        |
|          | o |                                                        |
|          | e |                                                        |
|          | v |                                                        |
|          | a |                                                        |
|          | l |                                                        |
|          | u |                                                        |
|          | a |                                                        |
|          | t |                                                        |
|          | e |                                                        |
|          | i |                                                        |
|          | m |                                                        |
|          | a |                                                        |
|          | g |                                                        |
|          | e |                                                        |
|          | q |                                                        |
|          | u |                                                        |
|          | a |                                                        |
|          | l |                                                        |
|          | i |                                                        |
|          | t |                                                        |
|          | y |                                                        |
+----------+---+--------------------------------------------------------+

#### YcbCrCoefficients

+----------+---+--------------------------------------------------------+
| De       | E |                                                        |
| finition | n |                                                        |
|          | c |                                                        |
|          | o |                                                        |
|          | d |                                                        |
|          | e |                                                        |
|          | s |                                                        |
|          | t |                                                        |
|          | h |                                                        |
|          | e |                                                        |
|          | t |                                                        |
|          | r |                                                        |
|          | a |                                                        |
|          | n |                                                        |
|          | s |                                                        |
|          | f |                                                        |
|          | o |                                                        |
|          | r |                                                        |
|          | m |                                                        |
|          | a |                                                        |
|          | t |                                                        |
|          | i |                                                        |
|          | o |                                                        |
|          | n |                                                        |
|          | f |                                                        |
|          | r |                                                        |
|          | o |                                                        |
|          | m |                                                        |
|          | R |                                                        |
|          | G |                                                        |
|          | B |                                                        |
|          | t |                                                        |
|          | o |                                                        |
|          | Y |                                                        |
|          | C |                                                        |
|          | b |                                                        |
|          | C |                                                        |
|          | r |                                                        |
|          | i |                                                        |
|          | m |                                                        |
|          | a |                                                        |
|          | g |                                                        |
|          | e |                                                        |
|          | d |                                                        |
|          | a |                                                        |
|          | t |                                                        |
|          | a |                                                        |
|          | . |                                                        |
|          | I |                                                        |
|          | t |                                                        |
|          | i |                                                        |
|          | s |                                                        |
|          | m |                                                        |
|          | a |                                                        |
|          | n |                                                        |
|          | d |                                                        |
|          | a |                                                        |
|          | t |                                                        |
|          | o |                                                        |
|          | r |                                                        |
|          | y |                                                        |
|          | w |                                                        |
|          | h |                                                        |
|          | e |                                                        |
|          | n |                                                        |
|          | * |                                                        |
|          | * |                                                        |
|          | P |                                                        |
|          | h |                                                        |
|          | o |                                                        |
|          | t |                                                        |
|          | o |                                                        |
|          | m |                                                        |
|          | e |                                                        |
|          | t |                                                        |
|          | r |                                                        |
|          | i |                                                        |
|          | c |                                                        |
|          | I |                                                        |
|          | n |                                                        |
|          | t |                                                        |
|          | e |                                                        |
|          | r |                                                        |
|          | p |                                                        |
|          | r |                                                        |
|          | e |                                                        |
|          | t |                                                        |
|          | a |                                                        |
|          | t |                                                        |
|          | i |                                                        |
|          | o |                                                        |
|          | n |                                                        |
|          | * |                                                        |
|          | * |                                                        |
|          | = |                                                        |
|          | 6 |                                                        |
|          | , |                                                        |
|          | a |                                                        |
|          | n |                                                        |
|          | d |                                                        |
|          | t |                                                        |
|          | h |                                                        |
|          | e |                                                        |
|          | r |                                                        |
|          | e |                                                        |
|          | a |                                                        |
|          | r |                                                        |
|          | e |                                                        |
|          | n |                                                        |
|          | o |                                                        |
|          | d |                                                        |
|          | e |                                                        |
|          | f |                                                        |
|          | a |                                                        |
|          | u |                                                        |
|          | l |                                                        |
|          | t |                                                        |
|          | s |                                                        |
|          | a |                                                        |
|          | l |                                                        |
|          | l |                                                        |
|          | o |                                                        |
|          | w |                                                        |
|          | e |                                                        |
|          | d |                                                        |
|          | . |                                                        |
|          | T |                                                        |
|          | h |                                                        |
|          | e |                                                        |
|          | t |                                                        |
|          | r |                                                        |
|          | a |                                                        |
|          | n |                                                        |
|          | s |                                                        |
|          | f |                                                        |
|          | o |                                                        |
|          | r |                                                        |
|          | m |                                                        |
|          | a |                                                        |
|          | t |                                                        |
|          | i |                                                        |
|          | o |                                                        |
|          | n |                                                        |
|          | i |                                                        |
|          | s |                                                        |
|          | s |                                                        |
|          | p |                                                        |
|          | e |                                                        |
|          | c |                                                        |
|          | i |                                                        |
|          | f |                                                        |
|          | i |                                                        |
|          | e |                                                        |
|          | d |                                                        |
|          | a |                                                        |
|          | s |                                                        |
|          | t |                                                        |
|          | h |                                                        |
|          | r |                                                        |
|          | e |                                                        |
|          | e |                                                        |
|          | r |                                                        |
|          | a |                                                        |
|          | t |                                                        |
|          | i |                                                        |
|          | o |                                                        |
|          | n |                                                        |
|          | a |                                                        |
|          | l |                                                        |
|          | v |                                                        |
|          | a |                                                        |
|          | l |                                                        |
|          | u |                                                        |
|          | e |                                                        |
|          | s |                                                        |
|          | t |                                                        |
|          | h |                                                        |
|          | a |                                                        |
|          | t |                                                        |
|          | r |                                                        |
|          | e |                                                        |
|          | p |                                                        |
|          | r |                                                        |
|          | e |                                                        |
|          | s |                                                        |
|          | e |                                                        |
|          | n |                                                        |
|          | t |                                                        |
|          | t |                                                        |
|          | h |                                                        |
|          | e |                                                        |
|          | c |                                                        |
|          | o |                                                        |
|          | e |                                                        |
|          | f |                                                        |
|          | f |                                                        |
|          | i |                                                        |
|          | c |                                                        |
|          | i |                                                        |
|          | e |                                                        |
|          | n |                                                        |
|          | t |                                                        |
|          | s |                                                        |
|          | u |                                                        |
|          | s |                                                        |
|          | e |                                                        |
|          | d |                                                        |
|          | t |                                                        |
|          | o |                                                        |
|          | c |                                                        |
|          | o |                                                        |
|          | m |                                                        |
|          | p |                                                        |
|          | u |                                                        |
|          | t |                                                        |
|          | e |                                                        |
|          | l |                                                        |
|          | u |                                                        |
|          | m |                                                        |
|          | i |                                                        |
|          | n |                                                        |
|          | a |                                                        |
|          | n |                                                        |
|          | c |                                                        |
|          | e |                                                        |
|          | , |                                                        |
|          | Y |                                                        |
|          | . |                                                        |
+----------+---+--------------------------------------------------------+
| Type     | e |                                                        |
|          | n |                                                        |
|          | u |                                                        |
|          | m |                                                        |
|          | e |                                                        |
|          | r |                                                        |
|          | a |                                                        |
|          | t |                                                        |
|          | e |                                                        |
|          | d |                                                        |
|          | t |                                                        |
|          | y |                                                        |
|          | p |                                                        |
|          | e |                                                        |
|          | ( |                                                        |
|          | r |                                                        |
|          | e |                                                        |
|          | s |                                                        |
|          | t |                                                        |
|          | r |                                                        |
|          | i |                                                        |
|          | c |                                                        |
|          | t |                                                        |
|          | e |                                                        |
|          | d |                                                        |
|          | t |                                                        |
|          | o |                                                        |
|          | e |                                                        |
|          | x |                                                        |
|          | t |                                                        |
|          | e |                                                        |
|          | r |                                                        |
|          | n |                                                        |
|          | a |                                                        |
|          | l |                                                        |
|          | s |                                                        |
|          | t |                                                        |
|          | a |                                                        |
|          | n |                                                        |
|          | d |                                                        |
|          | a |                                                        |
|          | r |                                                        |
|          | d |                                                        |
|          | ) |                                                        |
+----------+---+--------------------------------------------------------+
| Required | M |                                                        |
|          | A |                                                        |
+----------+---+--------------------------------------------------------+
| Re       | N |                                                        |
| peatable |   |                                                        |
+----------+---+--------------------------------------------------------+
| Values   |   |                                                        |
+----------+---+--------------------------------------------------------+
| Usage    | S |                                                        |
| Notes    | e |                                                        |
|          | e |                                                        |
|          | T |                                                        |
|          | I |                                                        |
|          | F |                                                        |
|          | F |                                                        |
|          | S |                                                        |
|          | e |                                                        |
|          | c |                                                        |
|          | t |                                                        |
|          | i |                                                        |
|          | o |                                                        |
|          | n |                                                        |
|          | 2 |                                                        |
|          | 1 |                                                        |
|          | Y |                                                        |
|          | C |                                                        |
|          | b |                                                        |
|          | C |                                                        |
|          | r |                                                        |
|          | I |                                                        |
|          | m |                                                        |
|          | a |                                                        |
|          | g |                                                        |
|          | e |                                                        |
|          | s |                                                        |
|          | a |                                                        |
|          | n |                                                        |
|          | d |                                                        |
|          | * |                                                        |
|          | * |                                                        |
|          | I |                                                        |
|          | S |                                                        |
|          | O |                                                        |
|          | / |                                                        |
|          | T |                                                        |
|          | C |                                                        |
|          | 4 |                                                        |
|          | 2 |                                                        |
|          | N |                                                        |
|          | 4 |                                                        |
|          | 3 |                                                        |
|          | 7 |                                                        |
|          | 8 |                                                        |
|          | T |                                                        |
|          | I |                                                        |
|          | F |                                                        |
|          | F |                                                        |
|          | / |                                                        |
|          | E |                                                        |
|          | P |                                                        |
|          | s |                                                        |
|          | t |                                                        |
|          | a |                                                        |
|          | n |                                                        |
|          | d |                                                        |
|          | a |                                                        |
|          | r |                                                        |
|          | d |                                                        |
|          | , |                                                        |
|          | S |                                                        |
|          | e |                                                        |
|          | c |                                                        |
|          | t |                                                        |
|          | i |                                                        |
|          | o |                                                        |
|          | n |                                                        |
|          | 5 |                                                        |
|          |   |                                                        |
|          | - |                                                        |
|          | T |                                                        |
|          | I |                                                        |
|          | F |                                                        |
|          | F |                                                        |
|          | / |                                                        |
|          | E |                                                        |
|          | P |                                                        |
|          | T |                                                        |
|          | a |                                                        |
|          | g |                                                        |
|          | d |                                                        |
|          | e |                                                        |
|          | f |                                                        |
|          | i |                                                        |
|          | n |                                                        |
|          | i |                                                        |
|          | t |                                                        |
|          | i |                                                        |
|          | o |                                                        |
|          | n |                                                        |
|          | s |                                                        |
|          | * |                                                        |
|          | * |                                                        |
|          | f |                                                        |
|          | o |                                                        |
|          | r |                                                        |
|          | v |                                                        |
|          | a |                                                        |
|          | l |                                                        |
|          | u |                                                        |
|          | e |                                                        |
|          | s |                                                        |
|          | a |                                                        |
|          | n |                                                        |
|          | d |                                                        |
|          | a |                                                        |
|          | d |                                                        |
|          | d |                                                        |
|          | i |                                                        |
|          | t |                                                        |
|          | i |                                                        |
|          | o |                                                        |
|          | n |                                                        |
|          | a |                                                        |
|          | l |                                                        |
|          | i |                                                        |
|          | n |                                                        |
|          | f |                                                        |
|          | o |                                                        |
|          | r |                                                        |
|          | m |                                                        |
|          | a |                                                        |
|          | t |                                                        |
|          | i |                                                        |
|          | o |                                                        |
|          | n |                                                        |
|          | r |                                                        |
|          | e |                                                        |
|          | g |                                                        |
|          | a |                                                        |
|          | r |                                                        |
|          | d |                                                        |
|          | i |                                                        |
|          | n |                                                        |
|          | g |                                                        |
|          | T |                                                        |
|          | I |                                                        |
|          | F |                                                        |
|          | F |                                                        |
|          | Y |                                                        |
|          | c |                                                        |
|          | b |                                                        |
|          | C |                                                        |
|          | r |                                                        |
|          | ( |                                                        |
|          | * |                                                        |
|          | C |                                                        |
|          | l |                                                        |
|          | a |                                                        |
|          | s |                                                        |
|          | s |                                                        |
|          | Y |                                                        |
|          | * |                                                        |
|          | ) |                                                        |
|          | i |                                                        |
|          | m |                                                        |
|          | a |                                                        |
|          | g |                                                        |
|          | e |                                                        |
|          | s |                                                        |
|          | . |                                                        |
+----------+---+--------------------------------------------------------+
| Use      | S |                                                        |
|          | y |                                                        |
|          | s |                                                        |
|          | t |                                                        |
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|          | m |                                                        |
|          | ( |                                                        |
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|          | t |                                                        |
|          | o |                                                        |
|          | n |                                                        |
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|          | c |                                                        |
|          | o |                                                        |
|          | l |                                                        |
|          | o |                                                        |
|          | r |                                                        |
|          | * |                                                        |
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|          |   |                                                        |
|          | M |                                                        |
|          | a |                                                        |
|          | n |                                                        |
|          | a |                                                        |
|          | g |                                                        |
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|          | h |                                                        |
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|          | q |                                                        |
|          | u |                                                        |
|          | a |                                                        |
|          | n |                                                        |
|          | t |                                                        |
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|          | a |                                                        |
|          | t |                                                        |
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|          | v |                                                        |
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|          | m |                                                        |
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|          | t |                                                        |
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|          | l |                                                        |
|          | u |                                                        |
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|          | a |                                                        |
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+----------+---+--------------------------------------------------------+

#### ReferenceBlackWhite

+----------+---+--------------------------------------------------------+
| De       | E |                                                        |
| finition | n |                                                        |
|          | c |                                                        |
|          | o |                                                        |
|          | d |                                                        |
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|          | a |                                                        |
|          | p |                                                        |
|          | a |                                                        |
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|          | r |                                                        |
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|          | f |                                                        |
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|          | a |                                                        |
|          | d |                                                        |
|          | r |                                                        |
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|          | o |                                                        |
|          | m |                                                        |
|          | a |                                                        |
|          | n |                                                        |
|          | d |                                                        |
|          | f |                                                        |
|          | o |                                                        |
|          | o |                                                        |
|          | t |                                                        |
|          | r |                                                        |
|          | o |                                                        |
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|          | m |                                                        |
|          | a |                                                        |
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|          | d |                                                        |
|          | a |                                                        |
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|          | a |                                                        |
|          | l |                                                        |
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|          | s |                                                        |
|          | f |                                                        |
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|          | a |                                                        |
|          | c |                                                        |
|          | h |                                                        |
|          | p |                                                        |
|          | i |                                                        |
|          | x |                                                        |
|          | e |                                                        |
|          | l |                                                        |
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|          | t |                                                        |
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|          | T |                                                        |
|          | h |                                                        |
|          | i |                                                        |
|          | s |                                                        |
|          | t |                                                        |
|          | a |                                                        |
|          | g |                                                        |
|          | i |                                                        |
|          | s |                                                        |
|          | m |                                                        |
|          | a |                                                        |
|          | n |                                                        |
|          | d |                                                        |
|          | a |                                                        |
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|          | w |                                                        |
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|          | p |                                                        |
|          | r |                                                        |
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|          | o |                                                        |
|          | n |                                                        |
|          | * |                                                        |
|          | * |                                                        |
|          | = |                                                        |
|          | 6 |                                                        |
|          | ( |                                                        |
|          | Y |                                                        |
|          | C |                                                        |
|          | b |                                                        |
|          | C |                                                        |
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|          | a |                                                        |
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|          | . |                                                        |
+----------+---+--------------------------------------------------------+
| Type     | e |                                                        |
|          | n |                                                        |
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|          | m |                                                        |
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|          | r |                                                        |
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|          | d |                                                        |
|          | t |                                                        |
|          | y |                                                        |
|          | p |                                                        |
|          | e |                                                        |
|          | ( |                                                        |
|          | r |                                                        |
|          | e |                                                        |
|          | s |                                                        |
|          | t |                                                        |
|          | r |                                                        |
|          | i |                                                        |
|          | c |                                                        |
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|          | d |                                                        |
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|          | o |                                                        |
|          | e |                                                        |
|          | x |                                                        |
|          | t |                                                        |
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|          | r |                                                        |
|          | n |                                                        |
|          | a |                                                        |
|          | l |                                                        |
|          | s |                                                        |
|          | t |                                                        |
|          | a |                                                        |
|          | n |                                                        |
|          | d |                                                        |
|          | a |                                                        |
|          | r |                                                        |
|          | d |                                                        |
|          | ) |                                                        |
+----------+---+--------------------------------------------------------+
| Required | M |                                                        |
|          | A |                                                        |
+----------+---+--------------------------------------------------------+
| Re       | N |                                                        |
| peatable |   |                                                        |
+----------+---+--------------------------------------------------------+
| Values   |   |                                                        |
+----------+---+--------------------------------------------------------+
| Usage    | S |                                                        |
| Notes    | e |                                                        |
|          | e |                                                        |
|          | T |                                                        |
|          | I |                                                        |
|          | F |                                                        |
|          | F |                                                        |
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|          | c |                                                        |
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|          | n |                                                        |
|          | 2 |                                                        |
|          | 1 |                                                        |
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|          | d |                                                        |
|          | * |                                                        |
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|          | / |                                                        |
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|          | 4 |                                                        |
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|          | 4 |                                                        |
|          | 3 |                                                        |
|          | 7 |                                                        |
|          | 8 |                                                        |
|          | T |                                                        |
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|          | F |                                                        |
|          | F |                                                        |
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|          | d |                                                        |
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|          | 5 |                                                        |
|          |   |                                                        |
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|          | F |                                                        |
|          | F |                                                        |
|          | / |                                                        |
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|          | d |                                                        |
|          | a |                                                        |
|          | d |                                                        |
|          | d |                                                        |
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|          | l |                                                        |
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|          | n |                                                        |
|          | f |                                                        |
|          | o |                                                        |
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|          | a |                                                        |
|          | t |                                                        |
|          | i |                                                        |
|          | o |                                                        |
|          | n |                                                        |
|          | r |                                                        |
|          | e |                                                        |
|          | g |                                                        |
|          | a |                                                        |
|          | r |                                                        |
|          | d |                                                        |
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|          | n |                                                        |
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|          | F |                                                        |
|          | F |                                                        |
|          | Y |                                                        |
|          | c |                                                        |
|          | b |                                                        |
|          | C |                                                        |
|          | r |                                                        |
|          | ( |                                                        |
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|          | C |                                                        |
|          | l |                                                        |
|          | a |                                                        |
|          | s |                                                        |
|          | s |                                                        |
|          | Y |                                                        |
|          | * |                                                        |
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|          | m |                                                        |
|          | a |                                                        |
|          | g |                                                        |
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|          | s |                                                        |
|          | . |                                                        |
+----------+---+--------------------------------------------------------+
| Use      | S |                                                        |
|          | y |                                                        |
|          | s |                                                        |
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|          | m |                                                        |
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|          | * |                                                        |
|          | ) |                                                        |
|          |   |                                                        |
|          | M |                                                        |
|          | a |                                                        |
|          | n |                                                        |
|          | a |                                                        |
|          | g |                                                        |
|          | e |                                                        |
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|          | , |                                                        |
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|          | n |                                                        |
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|          | f |                                                        |
|          | t |                                                        |
|          | h |                                                        |
|          | e |                                                        |
|          | q |                                                        |
|          | u |                                                        |
|          | a |                                                        |
|          | n |                                                        |
|          | t |                                                        |
|          | i |                                                        |
|          | t |                                                        |
|          | a |                                                        |
|          | t |                                                        |
|          | i |                                                        |
|          | v |                                                        |
|          | e |                                                        |
|          | m |                                                        |
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|          | t |                                                        |
|          | r |                                                        |
|          | i |                                                        |
|          | c |                                                        |
|          | s |                                                        |
|          | t |                                                        |
|          | o |                                                        |
|          | e |                                                        |
|          | v |                                                        |
|          | a |                                                        |
|          | l |                                                        |
|          | u |                                                        |
|          | a |                                                        |
|          | t |                                                        |
|          | e |                                                        |
|          | i |                                                        |
|          | m |                                                        |
|          | a |                                                        |
|          | g |                                                        |
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|          | q |                                                        |
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|          | a |                                                        |
|          | l |                                                        |
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|          | t |                                                        |
|          | y |                                                        |
+----------+---+--------------------------------------------------------+

### Segments

Image data is stored using either strips or tiles, which are
collectively termed segments (TIFF/EP, 10). TIFF specifies that
strip-oriented and tile-oriented fields must not be used in the same
file (TIFF, 67).

The following diagram illustrates the logical structure of the Segments
metadata.

**Figure 1** - Logical Structure of *Segments* Metadata

#### SegmentType

+----------+-----------------------------------------------------------+
| De       | *Specifies whether image data is stored in strips or      |
| finition | tiles.*                                                   |
+----------+-----------------------------------------------------------+
| Type     | enumerated type                                           |
+----------+-----------------------------------------------------------+
| Required | M                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | 0 = strips                                                |
|          |                                                           |
|          | 1 = tiles                                                 |
+----------+-----------------------------------------------------------+
| Usage    | When value = 0, fields 2.1.5.5-2.1.5.8 are irrelevant.    |
| Notes    |                                                           |
|          | When value = 1, fields 2.1.5.2-2.1.5.4 are irrelevant.    |
+----------+-----------------------------------------------------------+
| Use      | Manager                                                   |
+----------+-----------------------------------------------------------+

#### StripOffsets

  ------------ -----------------------------------------------------------
  Definition   *For each strip, the byte offset of that strip*.

  Type         positive integer

  Required     R (when applicable; see usage note in 2.1.5.1)

  Repeatable   N

  Values       

  Notes        "The **StripOffsets** field stores the offsets from the
               start of the image file to the start of each image data
               strip." (TIFF/EP)

  Use          System ("This required field is the only way for a reader
               to find the image data, unless TileOffsets is used," TIFF
               p40)
  ------------ -----------------------------------------------------------

#### RowsPerStrip

  ------------ -----------------------------------------------------------
  Definition   *The number of rows per strip*.

  Type         positive integer

  Required     R (when applicable; see usage note in 2.1.5.1)

  Repeatable   N

  Values       

  Notes        "RowsPerStrip and ImageLength together tell us the number
               of strips in the entire image. The equation is:..." (TIFF,
               p39)

  Use          System
  ------------ -----------------------------------------------------------

#### StripByteCounts

  ------------ -----------------------------------------------------------
  Definition   *The number of image data bytes stored within each strip
               after compression.*

  Type         positive integer

  Required     R (when applicable; see usage note in 2.1.5.1)

  Repeatable   N

  Values       

  Notes        

  Use          System
  ------------ -----------------------------------------------------------

#### TileWidth

  ------------ -----------------------------------------------------------
  Definition   *The tile width in pixels. This is the number of columns in
               each tile.*

  Type         positive integer

  Required     R (when applicable; see usage note in 2.1.5.1)

  Repeatable   N

  Values       

  Notes        

  Use          System
  ------------ -----------------------------------------------------------

#### TileLength

  ------------ -----------------------------------------------------------
  Definition   *The tile length (height) in pixels. This is the number of
               rows in each tile.*

  Type         positive integer

  Required     R (when applicable; see usage note in 2.1.5.1)

  Repeatable   N

  Values       

  Notes        

  Use          System
  ------------ -----------------------------------------------------------

#### TileOffsets

  ------------ -----------------------------------------------------------
  Definition   *For each tile, the byte offset of that tile, as compressed
               and stored on disk.*

  Type         positive integer

  Required     R (when applicable; see usage note in 2.1.5.1)

  Repeatable   N

  Values       

  Notes        

  Use          System
  ------------ -----------------------------------------------------------

#### TileByteCounts

+----------+---+-------------------------------------------------------+
| De       | * |                                                       |
| finition | F |                                                       |
|          | o |                                                       |
|          | r |                                                       |
|          | e |                                                       |
|          | a |                                                       |
|          | c |                                                       |
|          | h |                                                       |
|          | t |                                                       |
|          | i |                                                       |
|          | l |                                                       |
|          | e |                                                       |
|          | , |                                                       |
|          | t |                                                       |
|          | h |                                                       |
|          | e |                                                       |
|          | b |                                                       |
|          | y |                                                       |
|          | t |                                                       |
|          | e |                                                       |
|          | o |                                                       |
|          | f |                                                       |
|          | f |                                                       |
|          | s |                                                       |
|          | e |                                                       |
|          | t |                                                       |
|          | o |                                                       |
|          | f |                                                       |
|          | t |                                                       |
|          | h |                                                       |
|          | a |                                                       |
|          | t |                                                       |
|          | t |                                                       |
|          | i |                                                       |
|          | l |                                                       |
|          | e |                                                       |
|          | , |                                                       |
|          | a |                                                       |
|          | s |                                                       |
|          | c |                                                       |
|          | o |                                                       |
|          | m |                                                       |
|          | p |                                                       |
|          | r |                                                       |
|          | e |                                                       |
|          | s |                                                       |
|          | s |                                                       |
|          | e |                                                       |
|          | d |                                                       |
|          | a |                                                       |
|          | n |                                                       |
|          | d |                                                       |
|          | s |                                                       |
|          | t |                                                       |
|          | o |                                                       |
|          | r |                                                       |
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|          | d |                                                       |
|          | o |                                                       |
|          | n |                                                       |
|          | d |                                                       |
|          | i |                                                       |
|          | s |                                                       |
|          | k |                                                       |
|          | . |                                                       |
|          | * |                                                       |
+----------+---+-------------------------------------------------------+
| Type     | p |                                                       |
|          | o |                                                       |
|          | s |                                                       |
|          | i |                                                       |
|          | t |                                                       |
|          | i |                                                       |
|          | v |                                                       |
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|          | t |                                                       |
|          | e |                                                       |
|          | g |                                                       |
|          | e |                                                       |
|          | r |                                                       |
+----------+---+-------------------------------------------------------+
| Required | R |                                                       |
|          | ( |                                                       |
|          | w |                                                       |
|          | h |                                                       |
|          | e |                                                       |
|          | n |                                                       |
|          | a |                                                       |
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|          | p |                                                       |
|          | l |                                                       |
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|          | e |                                                       |
|          | i |                                                       |
|          | n |                                                       |
|          | 2 |                                                       |
|          | . |                                                       |
|          | 1 |                                                       |
|          | . |                                                       |
|          | 5 |                                                       |
|          | . |                                                       |
|          | 1 |                                                       |
|          | ) |                                                       |
+----------+---+-------------------------------------------------------+
| Re       | N |                                                       |
| peatable |   |                                                       |
+----------+---+-------------------------------------------------------+
| Values   | \ | = **TilesPerImage** for **PlanarConfiguration** = 1   |
|          | [ |                                                       |
|          | n | = **SamplesPerPixel** \* **TilesPerImage** for        |
|          | \ | **PlanarConfiguration** = 2                           |
|          | ] |                                                       |
+----------+---+-------------------------------------------------------+
| Notes    | F |                                                       |
|          | o |                                                       |
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|          | d |                                                       |
|          | . |                                                       |
|          |   |                                                       |
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|          | f |                                                       |
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|          | t |                                                       |
|          | s |                                                       |
|          | * |                                                       |
|          | * |                                                       |
|          | . |                                                       |
|          | ( |                                                       |
|          | T |                                                       |
|          | I |                                                       |
|          | F |                                                       |
|          | F |                                                       |
|          | , |                                                       |
|          | p |                                                       |
|          | 6 |                                                       |
|          | 8 |                                                       |
|          | ) |                                                       |
+----------+---+-------------------------------------------------------+
| Use      | S |                                                       |
|          | y |                                                       |
|          | s |                                                       |
|          | t |                                                       |
|          | e |                                                       |
|          | m |                                                       |
+----------+---+-------------------------------------------------------+

### PlanarConfiguration

+----------+-----------------------------------------------------------+
| De       | *Designates how the components of each pixel are stored.* |
| finition |                                                           |
+----------+-----------------------------------------------------------+
| Type     | enumerated type                                           |
+----------+-----------------------------------------------------------+
| Required | MA (when **SamplesPerPixel** \> 1; cf 2.2)                |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | 1 = chunky (pixel interleaved) format                     |
|          |                                                           |
|          | 2 = planar format                                         |
+----------+-----------------------------------------------------------+
| Notes    | "If **SamplesPerPixel** is 1, **PlanarConfiguration** is  |
|          | irrelevant." (TIFF, p38)                                  |
|          |                                                           |
|          | See, TIFF/EP 5.2.14 for an alternative definition of      |
|          | Planar Configuration that incorporates CFAPattern values. |
+----------+-----------------------------------------------------------+
| Use      | System                                                    |
+----------+-----------------------------------------------------------+

##  File

### ImageIdentifier

  ------------ -----------------------------------------------------------
  Definition   *A unique identifier*.

  Type         String

  Required     M

  Repeatable   N

  Values       

  Notes        Persistent identifier required at prime object level,
               optional at all other levels. This identifier must be
               unique within the local system. To facilitate file sharing
               or interoperability with other systems, a subelement
               (2.2.1.1 **ImageIdentifierLocation**) .may be added to
               designate the system or application within which the
               identifier is unique.

  Use          Manager, System
  ------------ -----------------------------------------------------------

#### ImageIdentifierLocation

  ------------ -----------------------------------------------------------
  Definition   *A location qualifier to be used in conjunction with 2.2.1
               **ImageIdentifier*****.**

  Type         String

  Required     O

  Repeatable   N

  Values       

  Notes        Persistent identifier required at prime object level,
               optional at all other levels. This identifier must be
               unique within the local system. To facilitate file sharing
               or interoperability with other systems,
               **ImageIdentifierLocation** may be added to designate the
               system or application within which the identifier is
               unique.

  Use          Manager, System
  ------------ -----------------------------------------------------------

### FileSize

+----------+-----------------------------------------------------------+
| De       | *Extent of image in number of bytes.*                     |
| finition |                                                           |
+----------+-----------------------------------------------------------+
| Type     | positive integer                                          |
+----------+-----------------------------------------------------------+
| Required | M                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | 618                                                       |
|          |                                                           |
| (E       | 72839                                                     |
| xamples) |                                                           |
|          | 116126                                                    |
+----------+-----------------------------------------------------------+
| Usage    | The file size must record the number of bytes as provided |
| Notes    | by the system. Do not attempt to record file sizes in     |
|          | terms of KB, MB or other notation.                        |
+----------+-----------------------------------------------------------+
| Use      | System                                                    |
+----------+-----------------------------------------------------------+

### Checksum

#### ChecksumMethod

+----------+-----------------------------------------------------------+
| De       | *Type of error detection technique used: A checksum (or   |
| finition | equivalent). *                                            |
+----------+-----------------------------------------------------------+
| Type     | enumerated type                                           |
+----------+-----------------------------------------------------------+
| Required | R                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   |                                                           |
+----------+-----------------------------------------------------------+
| Usage    | Local repository policies regarding file integrity        |
| Note     | metadata should govern implementation of this field. The  |
|          | enumerated type values should be defined locally, as      |
|          | should the rule regarding when the checksum is generated: |
|          | prior to deposit, at the time of deposit, or both.        |
|          |                                                           |
|          | Depending upon local implementation, this field may be    |
|          | used to list the specific type of error detection         |
|          | technique used (e.g., checksum, CRC, MNP, etc.) and the   |
|          | subsequent value would then be recorded in 2.2.3.1        |
|          | ***ChecksumValue***.                                      |
+----------+-----------------------------------------------------------+
| Use      | System                                                    |
|          |                                                           |
|          | Manager (to monitor file integrity)                       |
+----------+-----------------------------------------------------------+

#### ChecksumValue

+----------+-----------------------------------------------------------+
| De       | *Checksum (or equivalent). *                              |
| finition |                                                           |
+----------+-----------------------------------------------------------+
| Type     | Positive integer                                          |
+----------+-----------------------------------------------------------+
| Required | R                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   |                                                           |
+----------+-----------------------------------------------------------+
| Usage    | Linked to 2.2.3.1 ***ChecksumMethod***                    |
| Note     |                                                           |
+----------+-----------------------------------------------------------+
| Use      | System                                                    |
|          |                                                           |
|          | Manager (to monitor file integrity)                       |
+----------+-----------------------------------------------------------+

### Orientation

+----------+-----------------------------------------------------------+
| De       | *Designates the orientation of the image, with respect to |
| finition | the placement of its rows* (**ImageWidth**) *and columns* |
|          | (**ImageLength**), *as it was saved to disk.*             |
+----------+-----------------------------------------------------------+
| Type     | enumerated type (restricted to external standard)         |
+----------+-----------------------------------------------------------+
| Required | R                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | 1 = normal\*                                              |
|          |                                                           |
|          | 3 = normal rotated 180°                                   |
|          |                                                           |
|          | 6 = normal rotated cw 90°                                 |
|          |                                                           |
|          | 8 = normal rotated ccw 90°                                |
|          |                                                           |
|          | 9 = unknown                                               |
+----------+-----------------------------------------------------------+
| Usage    | \* "normal" is defined as follows: when opened, the top   |
| Notes    | (0^th^) row of pixels corresponds to the visual top of    |
|          | the image, and the first (0^th^) column of pixels on left |
|          | corresponds to the visual left-hand side of the image.    |
|          |                                                           |
|          | Consult TIFF for additional values referring to mirrored  |
|          | images. (Note that TIFF/EP supports only five values,     |
|          | which are proposed above as the finite list of enumerated |
|          | type values.)                                             |
|          |                                                           |
|          | This field is to be used to record only the orientation   |
|          | of the image, [not]{.underline} the orientation of the    |
|          | source to the device (e.g., camera) used to capture the   |
|          | image.                                                    |
+----------+-----------------------------------------------------------+
| Use      | System                                                    |
+----------+-----------------------------------------------------------+

### DisplayOrientation

+----------+-----------------------------------------------------------+
| De       | *Designates the orientation in which the image should be  |
| finition | presented to a conventional monitor with a 3:2 aspect     |
|          | ratio.*                                                   |
+----------+-----------------------------------------------------------+
| Type     | enumerated type (restricted to external standard)         |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | 0 = portrait                                              |
|          |                                                           |
|          | 1 = landscape                                             |
+----------+-----------------------------------------------------------+
| Notes    | This value is important to record when the preferred      |
|          | orientation of the image sent to a 3:2 aspect ratio       |
|          | computer monitor is different from **Orientation**.       |
|          |                                                           |
|          | While **Orientation** refers to the placement of pixels   |
|          | in the digital image file, **DisplayOrientation** refers  |
|          | to the preferred orientation in which to display the      |
|          | content (text, picture, table, etc.) *within* the file.   |
|          |                                                           |
|          | This field will likely become obsolete when "standard"    |
|          | delivery applications, such as web browsers, incorporate  |
|          | an image rotation tool.                                   |
+----------+-----------------------------------------------------------+
| Use      | System                                                    |
+----------+-----------------------------------------------------------+

### TargetedDisplayAR

#### XTargetedDisplayAR

  ------------ -----------------------------------------------------------
  Definition   *Unit of X orientation*

  Type         positive integer

  Required     O

  Repeatable   N

  Values       

  Notes        

  Use          System
  ------------ -----------------------------------------------------------

#### YTargetedDisplayAR

  ------------ -----------------------------------------------------------
  Definition   *Unit of Y orientation*

  Type         positive integer

  Required     O

  Repeatable   N

  Values       

  Notes        

  Use          System
  ------------ -----------------------------------------------------------

## PreferredPresentation

+----------+-----------------------------------------------------------+
| De       | *Designation of the device, application, medium, viewing  |
| finition | environment (or any combination thereof) to render the    |
|          | image data.*                                              |
+----------+-----------------------------------------------------------+
| Type     | string                                                    |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   |                                                           |
+----------+-----------------------------------------------------------+
| Usage    | For image data that can be defined to have a "best        |
| Notes    | representation," use this free-text field to recommend    |
|          | the "target" device, application, medium, viewing         |
|          | environment (or combination thereof) presumed or proven   |
|          | to be meaningful to image quality. This will be           |
|          | especially important as viewing devices other than the    |
|          | conventional 3:2 monitor become popular. Calculation and  |
|          | automated optimal display from one display Aspect Ratio   |
|          | to another will be possible with the information from     |
|          | 2.2.5 **DisplayOrientation** and the host of measurements |
|          | supported within this standard.                           |
|          |                                                           |
|          | The Library of Congress's presentation_profile specifies  |
|          | "the program (or equivalent) used to manage the           |
|          | presentation of this primary or intermediate object for   |
|          | users."                                                   |
|          |                                                           |
|          | Standard: *ISO/DIS 3664 Viewing conditions for graphic    |
|          | technology and photography*.                              |
+----------+-----------------------------------------------------------+
| Use      | Manager, User                                             |
+----------+-----------------------------------------------------------+

# Image Creation

This section can best be described as *descriptive* technical metadata.
While it provides no quantitative information, per se, it can provide
critical information with respect to the logistics and administrative
conditions surrounding digital image data capture. Frequently, simple
interrogation of these fields offers valuable diagnostics about the
image creation step as well as those of subsequent image generations.

**Image Creation**

This metadata block documents selected, irreversible attributes of the
analog-to-digital conversion process that may be used for future quality
assessment of the image data. By definition, image creation occurs only
once.

See, *5.1 Image Processing* for fields to record digital-to-digital
conversion processes.

## SourceType

+----------+-----------------------------------------------------------+
| De       | *This field specifies the medium of the                   |
| finition | [analog]{.underline} source material scanned to create a  |
|          | digital still image.*                                     |
+----------+-----------------------------------------------------------+
| Type     | string                                                    |
+----------+-----------------------------------------------------------+
| Required | R                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | daguerreotype                                             |
|          |                                                           |
| (E       | reflection print                                          |
| xamples) |                                                           |
|          | silver gelatin print                                      |
|          |                                                           |
|          | Acme Bronze 100                                           |
|          |                                                           |
|          | chromagenic film                                          |
|          |                                                           |
|          | 35mm color negative Kodak Royal Gold 100 Emul. 3712011    |
|          |                                                           |
|          | monograph                                                 |
|          |                                                           |
|          | microfilm                                                 |
+----------+-----------------------------------------------------------+
| Notes    | "General or specific physical nature of original item     |
|          | (i.e., still pictorial                                    |
| Usage    |                                                           |
| Notes    | image)." (LC)                                             |
|          |                                                           |
|          | [Do not record dimensions of source material in this      |
|          | field]{.underline}. See, **Source_Xdimension** (4.1.7)    |
|          | and **Source_Ydimension** (4.1.8).                        |
|          |                                                           |
|          | When the source of the image data is another digital      |
|          | still image (e.g., a parent high-resolution image used to |
|          | create a reduced-resolution image), see                   |
|          | **ImageProcessing** (5.1).                                |
+----------+-----------------------------------------------------------+
| Use      | Manager, User                                             |
+----------+-----------------------------------------------------------+

## SourceID

+----------+-----------------------------------------------------------+
| De       | *A unique identifier for a descriptive record of the      |
| finition | source of image.*                                         |
+----------+-----------------------------------------------------------+
| Type     | string                                                    |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | RLIN ID                                                   |
|          |                                                           |
| (E       | OCLC record number                                        |
| xamples) |                                                           |
|          | Local system control number                               |
+----------+-----------------------------------------------------------+
| Notes    | Link to existing data record for the source material.     |
+----------+-----------------------------------------------------------+
| Use      | Manager, System                                           |
+----------+-----------------------------------------------------------+

## ImageProducer

+----------+-----------------------------------------------------------+
| De       | *Identifies the organization‑level producer(s) of the     |
| finition | image.*                                                   |
+----------+-----------------------------------------------------------+
| Type     | string                                                    |
+----------+-----------------------------------------------------------+
| Required | R                                                         |
+----------+-----------------------------------------------------------+
| Re       | Y                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | Luna Imaging, Inc.                                        |
|          |                                                           |
| (E       | JJT, Inc.                                                 |
| xamples) |                                                           |
|          | University of Michigan; Digital Library Production        |
|          | Services                                                  |
|          |                                                           |
|          | Harvard College Library; Digital Imaging Group            |
|          |                                                           |
|          | University of Virginia; William Blake Archive             |
|          |                                                           |
|          | > When Repeatable = Y, the following is an example of how |
|          | > to code the information:                                |
|          | >                                                         |
|          | > \<ImageProducer\> University of Virginia                |
|          | > \</ImageProducer\>                                      |
|          | >                                                         |
|          | > \<ImageProducer\> William Blake Archive                 |
|          | > \</ImageProducer\>                                      |
+----------+-----------------------------------------------------------+
| Notes    | Identifies the organization‑level producer of the         |
|          | 'file/bitstream,' i.e., the scanned image, transcribed    |
|          | text, audio file, etc.                                    |
+----------+-----------------------------------------------------------+
| Use      | Manager                                                   |
+----------+-----------------------------------------------------------+

###  {#section .unnumbered}

## HostComputer

+----------+-----------------------------------------------------------+
| De       | *Computer and/or operating system in use at the time of   |
| finition | image creation.*                                          |
+----------+-----------------------------------------------------------+
| Type     | string                                                    |
+----------+-----------------------------------------------------------+
| Required | R                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   |                                                           |
+----------+-----------------------------------------------------------+
| Notes    | The definition for this multi-layered data element can be |
|          | interpreted narrowly, as in TIFF (see above), or broadly  |
|          | as in Cedars, which states: "This element contains        |
|          | information about the operating environment of the        |
|          | **original digital object at the time of ingest**,        |
|          | including information on relevant hardware and operating  |
|          | systems, together with the software products that would   |
|          | have been required in order to use it."                   |
|          |                                                           |
|          | Use **3.3.1 OS** and **3.3.2 OSVersion** to record        |
|          | specifics about the operating system.                     |
+----------+-----------------------------------------------------------+
| Use      | Manager                                                   |
+----------+-----------------------------------------------------------+

### OS (Operating System)

+----------+-----------------------------------------------------------+
| De       | *Operating system in use at the time of image creation.*  |
| finition |                                                           |
+----------+-----------------------------------------------------------+
| Type     | string                                                    |
+----------+-----------------------------------------------------------+
| Required | R                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | Windows                                                   |
|          |                                                           |
| (E       | Mac                                                       |
| xamples) |                                                           |
|          | Unix                                                      |
|          |                                                           |
|          | Linux                                                     |
+----------+-----------------------------------------------------------+
| Notes    |                                                           |
+----------+-----------------------------------------------------------+
| Use      | Manager                                                   |
+----------+-----------------------------------------------------------+

### OSVersion

+----------+-----------------------------------------------------------+
| De       | *Version of the operating system in use at the time of    |
| finition | image creation.*                                          |
+----------+-----------------------------------------------------------+
| Type     | string                                                    |
+----------+-----------------------------------------------------------+
| Required | MA                                                        |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | 2000. (e.g., Windows 2000)                                |
|          |                                                           |
| (E       | NT                                                        |
| xamples) |                                                           |
|          | X (e.g., Mac OS X)                                        |
|          |                                                           |
|          | V (e.g., Unix System V)                                   |
+----------+-----------------------------------------------------------+
| Notes    | Must be present if information is present in **3.3.1      |
|          | OS**.                                                     |
+----------+-----------------------------------------------------------+
| Use      | Manager                                                   |
+----------+-----------------------------------------------------------+

## DeviceSource

+----------+-----------------------------------------------------------+
| De       | *Classification of device used to create the image data.* |
| finition |                                                           |
+----------+-----------------------------------------------------------+
| Type     | string                                                    |
+----------+-----------------------------------------------------------+
| Required | R                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | transmission scanner                                      |
|          |                                                           |
| (E       | reflection print scanner                                  |
| xamples) |                                                           |
|          | digital still camera                                      |
|          |                                                           |
|          | still from video                                          |
+----------+-----------------------------------------------------------+
| Usage    | Recommended syntax: Local institutions should create a    |
| Notes    | list of enumerated values for use with this data element  |
|          | in order to regularize information. Doing so on a local   |
|          | level will allow for more rapid expansion of list to      |
|          | accommodate new technologies.                             |
|          |                                                           |
|          | When image processing software is used to generate the    |
|          | image data from a digital source, see **ImageProcessing** |
|          | (5.1).                                                    |
+----------+-----------------------------------------------------------+
| Use      | Manager                                                   |
+----------+-----------------------------------------------------------+

###  {#section-1 .unnumbered}

## ScanningSystemCapture

### ScanningSystemHardware

*The scanner manufacturer, model name and/or number used to create the
image.*

#### ScannerManufacturer

+----------+-----------------------------------------------------------+
| De       | *The manufacturer of the scanner used to create the       |
| finition | image.*                                                   |
+----------+-----------------------------------------------------------+
| Type     | string                                                    |
+----------+-----------------------------------------------------------+
| Required | R                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | Scitex                                                    |
|          |                                                           |
| (        |                                                           |
| Example) |                                                           |
+----------+-----------------------------------------------------------+
| Usage    |                                                           |
| Note     |                                                           |
+----------+-----------------------------------------------------------+
| Use      | Manager                                                   |
+----------+-----------------------------------------------------------+

#### ScannerModel

##### ScannerModelName

+----------+-----------------------------------------------------------+
| De       | *The model name of the scanner used to create the image.* |
| finition |                                                           |
+----------+-----------------------------------------------------------+
| Type     | string                                                    |
+----------+-----------------------------------------------------------+
| Required | R                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | Leaf Volare                                               |
|          |                                                           |
| (        |                                                           |
| Example) |                                                           |
+----------+-----------------------------------------------------------+
| Use      | Manager                                                   |
+----------+-----------------------------------------------------------+

#####  {#section-2 .unnumbered}

##### ScannerModelNumber

+----------+-----------------------------------------------------------+
| De       | *The model number of the scanner used to create the       |
| finition | image.*                                                   |
+----------+-----------------------------------------------------------+
| Type     | string                                                    |
+----------+-----------------------------------------------------------+
| Required | R                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   |                                                           |
|          |                                                           |
| (        |                                                           |
| Example) |                                                           |
+----------+-----------------------------------------------------------+
| Use      | Manager                                                   |
+----------+-----------------------------------------------------------+

##### ScannerModelSerialNo

+----------+-----------------------------------------------------------+
| De       | *The serial number of the scanner used to create the      |
| finition | image.*                                                   |
+----------+-----------------------------------------------------------+
| Type     | string                                                    |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   |                                                           |
|          |                                                           |
| (        |                                                           |
| Example) |                                                           |
+----------+-----------------------------------------------------------+
| Use      | Manager                                                   |
+----------+-----------------------------------------------------------+

### ScanningSystemSoftware

#### ScanningSoftware

+----------+-----------------------------------------------------------+
| De       | *The name of the capture software used to create the      |
| finition | image.*                                                   |
+----------+-----------------------------------------------------------+
| Type     | string                                                    |
+----------+-----------------------------------------------------------+
| Required | R                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | Leaf                                                      |
|          |                                                           |
| (        |                                                           |
| Example) |                                                           |
+----------+-----------------------------------------------------------+
| Use      | Manager                                                   |
+----------+-----------------------------------------------------------+

#### ScanningSoftwareVersionNo

+----------+-----------------------------------------------------------+
| De       | *The version number of the capture software used to       |
| finition | create the image.*                                        |
+----------+-----------------------------------------------------------+
| Type     | string                                                    |
+----------+-----------------------------------------------------------+
| Required | R                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | 4.0 (e.g., Leaf 4.0)                                      |
|          |                                                           |
| (        |                                                           |
| Example) |                                                           |
+----------+-----------------------------------------------------------+
| Use      | Manager                                                   |
+----------+-----------------------------------------------------------+

### ScannerCaptureSettings

#### PixelSize

+----------+-----------------------------------------------------------+
| De       | *This specifies the pixel size, in meters, of the         |
| finition | scanner.*                                                 |
+----------+-----------------------------------------------------------+
| Type     | Non-negative real                                         |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   |                                                           |
+----------+-----------------------------------------------------------+
| Usage    |                                                           |
| Note     |                                                           |
+----------+-----------------------------------------------------------+
| Use      | System                                                    |
|          |                                                           |
|          | Manager                                                   |
+----------+-----------------------------------------------------------+

#### PhysScanResolution

##### XphysScanResolution

+----------+-----------------------------------------------------------+
| De       | *This specifies the physical scanning resolution of the   |
| finition | device**,** in meters, recording the x (width)            |
|          | direction.*                                               |
+----------+-----------------------------------------------------------+
| Type     | Non-negative real                                         |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   |                                                           |
+----------+-----------------------------------------------------------+
| Usage    | This is NOT the interpolated resolution of the final      |
| Note     | output data                                               |
+----------+-----------------------------------------------------------+
| Use      | System                                                    |
|          |                                                           |
|          | Manager                                                   |
+----------+-----------------------------------------------------------+

##### YphysScanResolution

+----------+-----------------------------------------------------------+
| De       | *This specifies the physical scanning resolution of the   |
| finition | device**,** in meters, recording the Y (height)           |
|          | direction.*                                               |
+----------+-----------------------------------------------------------+
| Type     | Non-negative real                                         |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   |                                                           |
+----------+-----------------------------------------------------------+
| Usage    | This is NOT the interpolated resolution of the final      |
| Note     | output data                                               |
+----------+-----------------------------------------------------------+
| Use      | System                                                    |
|          |                                                           |
|          | Manager                                                   |
+----------+-----------------------------------------------------------+

##   {#section-3 .unnumbered}

##  {#section-4 .unnumbered}

## DigitalCameraCapture

### DigitalCameraManufacturer

+----------+-----------------------------------------------------------+
| De       | *The manufacturer of the digital camera used to create    |
| finition | the image.*                                               |
+----------+-----------------------------------------------------------+
| Type     | string                                                    |
+----------+-----------------------------------------------------------+
| Required | R                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | PhaseOne                                                  |
|          |                                                           |
| (        |                                                           |
| Example) |                                                           |
+----------+-----------------------------------------------------------+
| Use      | Manager                                                   |
+----------+-----------------------------------------------------------+

### DigitalCameraModel

+----------+-----------------------------------------------------------+
| De       | *The model of the digital camera used to create the       |
| finition | image.*                                                   |
+----------+-----------------------------------------------------------+
| Type     | string                                                    |
+----------+-----------------------------------------------------------+
| Required | R                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | H_20                                                      |
|          |                                                           |
| (E       | LightPhase                                                |
| xamples) |                                                           |
+----------+-----------------------------------------------------------+
| Use      | Manager                                                   |
+----------+-----------------------------------------------------------+

### CameraCaptureSettings

#### FNumber

+----------+-----------------------------------------------------------+
| De       | *This specifies the lens f-number (ratio of lens aperture |
| finition | to focal length) used when the image was captured.*       |
+----------+-----------------------------------------------------------+
| Type     | Non-negative real                                         |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   |                                                           |
+----------+-----------------------------------------------------------+
| Use      | System                                                    |
|          |                                                           |
|          | Manager                                                   |
+----------+-----------------------------------------------------------+

#### ExposureTime

+----------+-----------------------------------------------------------+
| De       | *This specifies the exposure time used when the image was |
| finition | captured. The value is to be recorded in seconds.*        |
+----------+-----------------------------------------------------------+
| Type     | Non-negative real                                         |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   |                                                           |
+----------+-----------------------------------------------------------+
| Usage    | Input may be given as a rational (e.g., 1/125), but       |
| Note     | systems should store the number as a non-negative real    |
|          | (e.g., 0.008).                                            |
+----------+-----------------------------------------------------------+
| Use      | System                                                    |
|          |                                                           |
|          | Manager                                                   |
+----------+-----------------------------------------------------------+

#### Brightness

+----------+-----------------------------------------------------------+
| De       | *This specifies the Brightness values measured when the   |
| finition | image was captured, using APEX values.*                   |
+----------+-----------------------------------------------------------+
| Type     | Non-negative real                                         |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   |                                                           |
+----------+-----------------------------------------------------------+
| Usage    | This value represents the light level at the source       |
| Note     | (document).                                               |
+----------+-----------------------------------------------------------+
| Use      | System                                                    |
|          |                                                           |
|          | Manager                                                   |
+----------+-----------------------------------------------------------+

#### Exposure Bias

+----------+-----------------------------------------------------------+
| De       | *This specifies the actual exposure bias (the amount of   |
| finition | under or over-exposure relative to a normal exposure, as  |
|          | determined by the camera\'s exposure system) used when    |
|          | capturing the image, using APEX units.*                   |
+----------+-----------------------------------------------------------+
| Type     | Non-negative real?                                        |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   |                                                           |
+----------+-----------------------------------------------------------+
| Use      | System                                                    |
|          |                                                           |
|          | Manager                                                   |
+----------+-----------------------------------------------------------+

#### SubjectDistance

+----------+-----------------------------------------------------------+
| De       | *This specifies the distance, in meters, between the      |
| finition | frontal plane of the camera lens and the subject on which |
|          | the camera was focused.*                                  |
+----------+-----------------------------------------------------------+
| Type     | Non-negative real                                         |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | \<SubjectDistance\>5\</SubjectDistance\> OR               |
|          |                                                           |
| (E       | \<SubjectDistance min="4.9"                               |
| xamples) | max="5.3"\>5\</SubjectDistance\> OR                       |
|          |                                                           |
|          | \<SubjectDistance min="4.9" max="5.3"/\>                  |
+----------+-----------------------------------------------------------+
| Usage    | May specify a range of values, bounded by minimum and     |
| Note     | maximum                                                   |
+----------+-----------------------------------------------------------+
| Use      | System                                                    |
|          |                                                           |
|          | Manager                                                   |
+----------+-----------------------------------------------------------+

#### MeteringMode

+----------+-----------------------------------------------------------+
| De       | *This specifies the metering mode (the camera\'s method   |
| finition | of spatially weighting the scene luminance values to      |
|          | determine the sensor exposure) used when capturing the    |
|          | image.*                                                   |
+----------+-----------------------------------------------------------+
| Type     | Enumerated type (limited to list)                         |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | Average                                                   |
|          |                                                           |
| (E       | Center weighted Average                                   |
| xamples) |                                                           |
|          | Spot                                                      |
|          |                                                           |
|          | Multispot                                                 |
|          |                                                           |
|          | Pattern                                                   |
|          |                                                           |
|          | Partial                                                   |
+----------+-----------------------------------------------------------+
| Usage    |                                                           |
| Note     |                                                           |
+----------+-----------------------------------------------------------+
| Use      | System                                                    |
|          |                                                           |
|          | Manager                                                   |
+----------+-----------------------------------------------------------+

#### SceneIlluminant

+----------+-----------------------------------------------------------+
| De       | *This specifies the light source that was present when    |
| finition | the image was captured.*                                  |
+----------+-----------------------------------------------------------+
| Type     | Enumerated type (restricted to external standard)         |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | Daylight                                                  |
|          |                                                           |
|          | Fluorescent                                               |
|          |                                                           |
|          | Tungsten Lamp                                             |
|          |                                                           |
|          | Flash                                                     |
|          |                                                           |
|          | Standard Illuminant A                                     |
|          |                                                           |
|          | Standard Illuminant B                                     |
|          |                                                           |
|          | Standard Illuminant C                                     |
|          |                                                           |
|          | D55 Illuminant                                            |
|          |                                                           |
|          | D65 Illuminant                                            |
|          |                                                           |
|          | D75 Illuminant                                            |
+----------+-----------------------------------------------------------+
| Usage    | Values for this data element must be drawn from the list  |
| Note     | documented in the DIG35 standard.                         |
+----------+-----------------------------------------------------------+
| Use      | System                                                    |
|          |                                                           |
|          | Manager                                                   |
+----------+-----------------------------------------------------------+

#### ColorTemp

+----------+-----------------------------------------------------------+
| De       | *This specifies the actual color temperature value of the |
| finition | scene illuminant in units of Kelvin.*                     |
+----------+-----------------------------------------------------------+
| Type     | Non-negative real                                         |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   |                                                           |
+----------+-----------------------------------------------------------+
| Use      | System                                                    |
|          |                                                           |
|          | Manager                                                   |
+----------+-----------------------------------------------------------+

#### FocalLength

+----------+-----------------------------------------------------------+
| De       | *This specifies the lens focal length in meters used to   |
| finition | capture the image.*                                       |
+----------+-----------------------------------------------------------+
| Type     | Real                                                      |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   |                                                           |
+----------+-----------------------------------------------------------+
| Use      | System                                                    |
|          |                                                           |
|          | Manager                                                   |
+----------+-----------------------------------------------------------+

#### Flash

+----------+-----------------------------------------------------------+
| De       | *This specifies whether a flash was used in image         |
| finition | capture.*                                                 |
+----------+-----------------------------------------------------------+
| Type     | Enumerated type                                           |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | Yes                                                       |
|          |                                                           |
|          | No                                                        |
+----------+-----------------------------------------------------------+
| Use      | System                                                    |
|          |                                                           |
|          | Manager                                                   |
+----------+-----------------------------------------------------------+

#### FlashEnergy

+----------+-----------------------------------------------------------+
| De       | *This specifies the amount of flash energy that was used  |
| finition | in Beam Candle Power Seconds (BCPS).*                     |
+----------+-----------------------------------------------------------+
| Type     | Non-negative real                                         |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   |                                                           |
+----------+-----------------------------------------------------------+
| Use      | System                                                    |
|          |                                                           |
|          | Manager                                                   |
+----------+-----------------------------------------------------------+

#### FlashReturn

+----------+-----------------------------------------------------------+
| De       | *This specifies whether the camera judged that the flash  |
| finition | was not effective at the time of exposure.*               |
+----------+-----------------------------------------------------------+
| Type     | Enumerated type                                           |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | Yes                                                       |
|          |                                                           |
|          | No                                                        |
+----------+-----------------------------------------------------------+
| Use      | System                                                    |
|          |                                                           |
|          | Manager                                                   |
+----------+-----------------------------------------------------------+

#### BackLight

+----------+----------+------------------------------------------------+
| De       | *This    |                                                |
| finition | s        |                                                |
|          | pecifies |                                                |
|          | the      |                                                |
|          | lighting |                                                |
|          | co       |                                                |
|          | nditions |                                                |
|          | at the   |                                                |
|          | time of  |                                                |
|          | ex       |                                                |
|          | posure.* |                                                |
+----------+----------+------------------------------------------------+
| Type     | En       |                                                |
|          | umerated |                                                |
|          | type     |                                                |
|          | (re      |                                                |
|          | stricted |                                                |
|          | to       |                                                |
|          | external |                                                |
|          | s        |                                                |
|          | tandard) |                                                |
+----------+----------+------------------------------------------------+
| Required | O        |                                                |
+----------+----------+------------------------------------------------+
| Re       | N        |                                                |
| peatable |          |                                                |
+----------+----------+------------------------------------------------+
| Values   | Front    | "Subject is illuminated from the front side."  |
|          | light    |                                                |
|          |          | "The brightness value difference between the   |
|          | Bac      | subject center and the surrounding area is     |
|          | klight_1 | greater than one full stop (APEX). The frame   |
|          |          | is exposed for the subject center."            |
|          | Bac      |                                                |
|          | klight_2 | "The brightness value difference between the   |
|          |          | subject center and the surrounding area is     |
|          |          | greater than one full stop (APEX). The frame   |
|          |          | is exposed for the surrounding area."          |
+----------+----------+------------------------------------------------+
| Usage    | Values   |                                                |
| Note     | for this |                                                |
|          | data     |                                                |
|          | element  |                                                |
|          | must be  |                                                |
|          | drawn    |                                                |
|          | from the |                                                |
|          | list     |                                                |
|          | do       |                                                |
|          | cumented |                                                |
|          | in the   |                                                |
|          | DIG35    |                                                |
|          | standard |                                                |
|          | (DIG35   |                                                |
|          | B3.2.5   |                                                |
|          | \<Back_L |                                                |
|          | ight\>). |                                                |
+----------+----------+------------------------------------------------+
| Use      | System   |                                                |
|          |          |                                                |
|          | Manager  |                                                |
+----------+----------+------------------------------------------------+

#### ExposureIndex

+----------+-----------------------------------------------------------+
| De       | *This specifies the exposure index setting used.*         |
| finition |                                                           |
+----------+-----------------------------------------------------------+
| Type     | Non-negative real                                         |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   |                                                           |
+----------+-----------------------------------------------------------+
| Use      | System                                                    |
|          |                                                           |
|          | Manager                                                   |
+----------+-----------------------------------------------------------+

#### AutoFocus

+----------+---------------+-------------------------------------------+
| De       | *This         |                                           |
| finition | specifies the |                                           |
|          | status of the |                                           |
|          | capture       |                                           |
|          | device's      |                                           |
|          | focus at the  |                                           |
|          | time of       |                                           |
|          | capture.*     |                                           |
+----------+---------------+-------------------------------------------+
| Type     | enumerated    |                                           |
|          | list          |                                           |
|          | (restricted   |                                           |
|          | to external   |                                           |
|          | standard)     |                                           |
+----------+---------------+-------------------------------------------+
| Required | O             |                                           |
+----------+---------------+-------------------------------------------+
| Re       | N             |                                           |
| peatable |               |                                           |
+----------+---------------+-------------------------------------------+
| Values   | Auto Focus    | "The camera successfully focused on the   |
|          | Used          | subject."                                 |
|          |               |                                           |
|          | Auto Focus    | "The image was captured before the camera |
|          | Interrupted   | had successfully focused on the subject." |
|          |               |                                           |
|          | Near Focused  | "The camera deliberately focused at a     |
|          |               | distance closer than the subject to allow |
|          | Soft Focused  | for the super-imposition of a focused     |
|          |               | foreground subject."                      |
|          | Manual        |                                           |
|          |               | "The camera deliberately did not focus    |
|          |               | exactly at the subject distance to create |
|          |               | a softer image (commonly used in          |
|          |               | portraits)."                              |
|          |               |                                           |
|          |               | "The camera was focused manually."        |
+----------+---------------+-------------------------------------------+
| Usage    | Values for    |                                           |
| Note     | this data     |                                           |
|          | element must  |                                           |
|          | be drawn from |                                           |
|          | the list      |                                           |
|          | documented in |                                           |
|          | the DIG35     |                                           |
|          | standard      |                                           |
|          | (DIG35 B3.2.5 |                                           |
|          | \<Auto Focus  |                                           |
|          | Values\>).    |                                           |
+----------+---------------+-------------------------------------------+
| Use      | System        |                                           |
|          |               |                                           |
|          | Manager       |                                           |
+----------+---------------+-------------------------------------------+

#### PrintAspectRatio

*This specifies the print aspect ratio selected by the user when the
picture was taken.*

##### XPrintAspectRatio

+----------+-----------------------------------------------------------+
| De       | *Unit of X ratio*                                         |
| finition |                                                           |
+----------+-----------------------------------------------------------+
| Type     | non-negative real                                         |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   |                                                           |
+----------+-----------------------------------------------------------+
| Use      | System                                                    |
|          |                                                           |
|          | Manager                                                   |
+----------+-----------------------------------------------------------+

##### YprintAspectRatio

+----------+-----------------------------------------------------------+
| De       | *Unit of Y ratio*                                         |
| finition |                                                           |
+----------+-----------------------------------------------------------+
| Type     | non-negative real                                         |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   |                                                           |
+----------+-----------------------------------------------------------+
| Use      | System                                                    |
|          |                                                           |
|          | Manager                                                   |
+----------+-----------------------------------------------------------+

## Sensor

+----------+-----------------------------------------------------------+
| De       | *Designates the type of image sensor used in the camera   |
| finition | or image capture device.*                                 |
+----------+-----------------------------------------------------------+
| Type     | enumerated type (restricted to external standard)         |
+----------+-----------------------------------------------------------+
| Required | R                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | undefined                                                 |
|          |                                                           |
|          | MonochromeArea                                            |
|          |                                                           |
|          | OneChipColorArea                                          |
|          |                                                           |
|          | TwoChipColorArea                                          |
|          |                                                           |
|          | ThreeChipColorArea                                        |
|          |                                                           |
|          | ColorSequentialArea                                       |
|          |                                                           |
|          | MonochromeLinear                                          |
|          |                                                           |
|          | ColorTriLinear                                            |
|          |                                                           |
|          | ColorSequentialLinear                                     |
+----------+-----------------------------------------------------------+
| Notes    | Enumerated values drawn from TIFF/EP 37399 (p25-26)       |
+----------+-----------------------------------------------------------+
| Use      | Manager                                                   |
+----------+-----------------------------------------------------------+

## DateTimeCreated

  ------------ -----------------------------------------------------------
  Definition   *Date or DateTime image was created.*

  Type         DateTime

  Required     MA

  Repeatable   N

  Values       YYYY-MM-DD

  Usage Notes  See, **DateTimeProcessed** (5.1.1) for images created by
               processing image data (i.e., digital-to-digital
               conversion).

  Use          Manager
  ------------ -----------------------------------------------------------

##  Methodology 

+----------+---------------+-------------------------------------------+
| De       | *Designates   |                                           |
| finition | the           |                                           |
|          | methodology   |                                           |
|          | and rationale |                                           |
|          | to digitize   |                                           |
|          | an object or  |                                           |
|          | collection.*  |                                           |
+----------+---------------+-------------------------------------------+
| Type     | string        |                                           |
+----------+---------------+-------------------------------------------+
| Required | O             |                                           |
+----------+---------------+-------------------------------------------+
| Re       | N             |                                           |
| peatable |               |                                           |
+----------+---------------+-------------------------------------------+
| Values   | string        | http://l                                  |
|          |               | cweb2.loc.gov/ammem/techdocs/digcols.html |
| (E       | \[free text\] |                                           |
| xamples) |               |                                           |
|          | \[filename or |                                           |
|          | URL\]         |                                           |
+----------+---------------+-------------------------------------------+
| Notes    | For an        |                                           |
|          | example, see  |                                           |
|          | "Building     |                                           |
|          | Digital       |                                           |
|          | Collections"  |                                           |
|          | notes         |                                           |
|          | associated    |                                           |
|          | with the      |                                           |
|          | American      |                                           |
|          | Memory        |                                           |
|          | collections,  |                                           |
|          | Library of    |                                           |
|          | Congress,     |                                           |
|          | National      |                                           |
|          | Digital       |                                           |
|          | Library       |                                           |
|          | Program,      |                                           |
|          | http://lcw    |                                           |
|          | eb2.loc.gov/a |                                           |
|          | mmem/techdocs |                                           |
|          | /digcols.html |                                           |
+----------+---------------+-------------------------------------------+
| Use      | Manager, User |                                           |
+----------+---------------+-------------------------------------------+

# Imaging Performance Assessment

The operative principle in this section is to *maintain* the attributes
of the image inherent to its quality. The title *Performance Assessment*
has both a present and future context: these elements serve as metrics
to assess the accuracy of output (today's use), and to assess the
accuracy of preservation techniques, particularly migration (future
use).

Sub-sections *4.1 Spatial Metrics* and *4.2 Energetics* are meant as
high-level quantitative measures of imaging performance. Sub-section
*4.3 Targets* is meant to complement the former by providing low-level
benchmarking quantification of the absolute imaging performance of the
digital capture process. This information in this latter section should
be closely tied to sanctioned imaging performance standards when
available. In the absence of such standards, *de-facto* standards are
appropriate.

To help in the understanding of this section, Figures 1 and 2 are
provided as examples of typical imaging chains. Frequently, confusion
exists around image state generations, and at which generation the
metadata is meant to apply. Often, knowledge at all levels is required.
In such cases, repeatable fields for a given element are offered.

![](media/image1.wmf)

**Figure 2** - Digital conversion of Intermediate; Indirect conversion
of Source

![](media/image2.wmf){width="3.5in" height="1.2680555555555555in"}

**Figure 3** - Direct digital conversion of Source

To a large extent, the image of any source can be linked backed to that
source with appropriate capture documentation and benchmarking targets.
While the original source characteristics are not unequivocally
recoverable, suitably accurate reconstructions of the source can, in
principle, occur. The high level metrics of sub-sections 4.1 and 4.2 can
provide nominal recovery of the original source characteristics.
Detailed imaging performance information in Section 4.3, if properly
documented, is a reliable thread to more accurate source
characteristics.

##  Spatial Metrics

While it is recognized that digital images can describe
three-dimensional objects, this section deals only with the classic
2-dimensional projection of such objects as seen by the imaging device
at any given instant in time. The digital image assumes the form of a
uniformly sampled rectangular grid of pixels (picture elements) in the
\"x\" (ImageWidth) and \"y\" (ImageLength) dimensions. The global
photometrics associated with each of these pixels is covered in
sub-section 4.2.

Though range or depth data (i.e. \"z\" dimension) can be digitized with
specialized 3-D imaging devices, these are outside the scope of this
document

### SamplingFrequencyPlane

+----------+-----------------------------------------------------------+
| De       | *The reference plane location for which*                  |
| finition | **XSamplingFrequenc**y *and* **YsamplingFrequency** *are  |
|          | designated.*                                              |
+----------+-----------------------------------------------------------+
| Type     | enumerated type (restricted to list)                      |
+----------+-----------------------------------------------------------+
| Required | M                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | 1 = camera/scanner focal plane                            |
|          |                                                           |
|          | 2 = object plane                                          |
|          |                                                           |
|          | 3 = source object plane                                   |
+----------+-----------------------------------------------------------+
| Notes    | *This element is meant to remove the ambiguity with       |
|          | respect to* **XSamplingFrequency** *and*                  |
|          | **YSamplingFrequency** *for the scanning of film          |
|          | intermediates. It can be used to deduce*                  |
|          | **Source_Xdimension** *or* **Source_Ydimension** *in      |
|          | conjunction with* **ImageWidth** *or* **ImageLength.**    |
|          |                                                           |
|          | Value = **1** is consistent with DIG35 (B.3.2.4) and      |
|          | TIFF/EP 5.2.9-5.2.10 and is an indication of the physical |
|          | sensor sampling frequency. It is of limited use without   |
|          | knowledge of the optical magnification between sensor and |
|          | imaged object                                             |
|          |                                                           |
|          | Value = **2** would be most common for direct scanning of |
|          | source objects. If "object plane" is the same as "source  |
|          | object plane," (Fig. 3) this value is used.               |
|          |                                                           |
|          | Value = **3** commonly used for film intermediates such   |
|          | as microfilm where **XSampling Frequency** and            |
|          | **YSamplingFrequency** are often referred to at the       |
|          | source object plane rather than the object film plane     |
|          | (Fig. 2).                                                 |
+----------+-----------------------------------------------------------+
| Use      | System, accurate output of file to print/film (*size*)    |
|          |                                                           |
|          | Manager, one of the quantitative metrics to evaluate      |
|          | image quality                                             |
+----------+-----------------------------------------------------------+

### SamplingFrequencyUnit

+----------+-----------------------------------------------------------+
| De       | *The unit of measurement for* **XSamplingFrequency**      |
| finition | *and* **YSamplingFrequency**.                             |
+----------+-----------------------------------------------------------+
| Type     | enumerated type (restricted to external standard)         |
+----------+-----------------------------------------------------------+
| Required | M                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | 1 = no absolute unit of measurement.                      |
|          |                                                           |
|          | 2 = inch                                                  |
|          |                                                           |
|          | 3 = centimeter                                            |
+----------+-----------------------------------------------------------+
| Usage    | From TIFF 296 (*Baseline [Required]{.underline}*, p21-24, |
| Notes    | 38), TIFF/EP 296 (5.2.8):                                 |
|          |                                                           |
|          | Value "1" used for images that may have a non-square      |
|          | aspect ratio, but no meaningful absolute dimensions. In   |
|          | copy work, should also be used when source measurements   |
|          | are unknown (e.g., when a photo-intermediate such as 35mm |
|          | negative film is the source).                             |
|          |                                                           |
|          | When **SamplingFrequencyUnit** = 2 [and]{.underline}      |
|          | **Source_Xdimension** is given in inches, the             |
|          | **XSamplingFrequency** may be calculated as follows:      |
|          |                                                           |
|          | **XSamplingFrequency** =                                  |
|          | **ImageLength**/**Source_Xdimension**                     |
|          |                                                           |
|          | When **SamplingFrequencyUnit** = 2 [and]{.underline}      |
|          | **Source_Ydimension** is given in inches, the             |
|          | **YSamplingFrequency** may be calculated as follows:      |
|          |                                                           |
|          | **YSamplingFrequency** =                                  |
|          | **ImageWidth**/**Source_Ydimension**                      |
|          |                                                           |
|          | The same formulas may be used when                        |
|          | **SamplingFrequencyUnit** = 3 and source dimensions are   |
|          | given in centimeters.                                     |
+----------+-----------------------------------------------------------+
| Use      | System, accurate output of file to print/film (*size*)    |
|          |                                                           |
|          | Manager, one of the quantitative metrics to evaluate      |
|          | image quality                                             |
+----------+-----------------------------------------------------------+

### XSamplingFrequency 

+----------+-----------------------------------------------------------+
| De       | *This field specifies the number of pixels per*           |
| finition | **SamplingFrequencyUnit** *in the image width.*           |
+----------+-----------------------------------------------------------+
| Type     | positive integer                                          |
+----------+-----------------------------------------------------------+
| Required | MA (when **SamplingFrequencyUnit** = 2 or 3)              |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   |                                                           |
+----------+-----------------------------------------------------------+
| Notes    | With fields **YSamplingFrequency** (4.1.4) and            |
|          | **SamplingFrequencyUnit** (4.1.2), **XSamplingFrequency** |
|          | specifies the dimensions (scale) of the printed image.    |
|          |                                                           |
|          | When **SamplingFrequencyUnit**=1, this value for this     |
|          | field shall be null.                                      |
+----------+-----------------------------------------------------------+
| Use      | System, accurate output of file to print/film (*size*)    |
|          |                                                           |
|          | Manager, one of the quantitative metrics to evaluate      |
|          | image quality                                             |
+----------+-----------------------------------------------------------+

###  {#section-5 .unnumbered}

### YSamplingFrequency 

+----------+-----------------------------------------------------------+
| De       | *This field specifies the number of pixels per*           |
| finition | **SamplingFrequencyUnit** *in the image length.*          |
+----------+-----------------------------------------------------------+
| Type     | positive integer                                          |
+----------+-----------------------------------------------------------+
| Required | MA (when **SamplingFrequencyUnit**=2 or 3)                |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   |                                                           |
+----------+-----------------------------------------------------------+
| Notes    | With fields **YSamplingFrequency** (4.1.4) and            |
|          | **SamplingFrequencyUnit** (4.1.5), **YSamplingFrequency** |
|          | specifies the dimensions (scale) of the printed image.    |
+----------+-----------------------------------------------------------+
| Use      | System, accurate output of file to print/film (*size*)    |
|          |                                                           |
|          | Manager, one of the quantitative metrics to evaluate      |
|          | image quality                                             |
+----------+-----------------------------------------------------------+

### ImageWidth

+----------+-----------------------------------------------------------+
| De       | *This specifies the width of the digital image, i.e.      |
| finition | horizontal or X dimension, in pixels.*                    |
+----------+-----------------------------------------------------------+
| Type     | positive integer                                          |
+----------+-----------------------------------------------------------+
| Required | MA                                                        |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   |                                                           |
+----------+-----------------------------------------------------------+
| Notes    | The image width may be the shorter or longer dimension of |
|          | the image, depending upon the orientation of the camera   |
|          | or scanner during image capture. For multiple-resolution  |
|          | image file formats, value shall specify the highest       |
|          | resolution.                                               |
|          |                                                           |
|          | This value may be used to calculate                       |
|          | **XSamplingFrequency** when **Source_Xdimension** is      |
|          | given in inches and **SamplingFrequencyUnit** = 2.        |
|          |                                                           |
|          | [Formula to calculate XSamplingFrequency]{.underline}:    |
|          |                                                           |
|          | **XSamplingFrequency** =                                  |
|          | **ImageWidth**/**Source_Xdimension**                      |
+----------+-----------------------------------------------------------+
| Use      | System, required field for image viewers (*size*)         |
|          |                                                           |
|          | Manager, one of the quantitative metrics to evaluate      |
|          | image quality                                             |
+----------+-----------------------------------------------------------+

### ImageLength

+----------+-----------------------------------------------------------+
| De       | *This specifies the length of the digital image, i.e.     |
| finition | vertical or Y dimension, in pixels.*                      |
+----------+-----------------------------------------------------------+
| Type     | positive integer                                          |
+----------+-----------------------------------------------------------+
| Required | MA                                                        |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   |                                                           |
+----------+-----------------------------------------------------------+
| Notes    | The image length may be the shorter or longer dimension   |
|          | of the image, depending upon the orientation of the       |
|          | camera or scanner during image capture. For               |
|          | multiple-resolution image file formats, value shall       |
|          | specify the highest resolution.                           |
|          |                                                           |
|          | This field may be used to calculate                       |
|          | **YSamplingFrequency** when **Source_Ydimension** is      |
|          | given in inches and **SamplingFrequencyUnit** = 2         |
|          |                                                           |
|          | [Formula to calculate YSamplingFrequency]{.underline}:    |
|          |                                                           |
|          | **YSamplingFrequency** =                                  |
|          | **ImageLength**/**Source_Ydimension**                     |
+----------+-----------------------------------------------------------+
| Use      | System, required field for image viewers (*size*)         |
|          |                                                           |
|          | Manager, one of the quantitative metrics to evaluate      |
|          | image quality                                             |
+----------+-----------------------------------------------------------+

### Source_Xdimension

+----------+-----------------------------------------------------------+
| De       | *Specifies the width of the scanned object.*              |
| finition |                                                           |
+----------+-----------------------------------------------------------+
| Type     | \[non-negative real\]                                     |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | 7.63 (e.g., 7.63 inches)                                  |
|          |                                                           |
| (E       | 32 (e.g., 32 mm)                                          |
| xamples) |                                                           |
+----------+-----------------------------------------------------------+
| Usage    | The unit of measure (inches, meters, etc.) used must be   |
| Notes    | specified in 4.1.7.1 **Source_XdimensionUnit.**           |
|          |                                                           |
|          | If unknown or impractical to record, the value of         |
|          | **Source_Xdimension** may be deduced. See,                |
|          | **SamplingFrequencyPlane** (4.1.6).                       |
+----------+-----------------------------------------------------------+
| Use      | System, accurate output of file to print/film (*size*)    |
|          |                                                           |
|          | Manager, one of the quantitative metrics to evaluate      |
|          | image quality                                             |
+----------+-----------------------------------------------------------+

#### Source_XdimensionUnit

+----------+-----------------------------------------------------------+
| De       | *Specifies the unit of measure used in 4.1.7*             |
| finition | **Source_Xdimension**                                     |
+----------+-----------------------------------------------------------+
| Type     | string                                                    |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | inches                                                    |
|          |                                                           |
| (E       | mm                                                        |
| xamples) |                                                           |
+----------+-----------------------------------------------------------+
| Notes    |                                                           |
+----------+-----------------------------------------------------------+
| Use      | System, accurate output of file to print/film (*size*)    |
|          |                                                           |
|          | Manager, one of the quantitative metrics to evaluate      |
|          | image quality                                             |
+----------+-----------------------------------------------------------+

### Source_Ydimension

+----------+-----------------------------------------------------------+
| De       | *Specifies the height (i.e., vertical dimension) of the   |
| finition | scanned object.*                                          |
+----------+-----------------------------------------------------------+
| Type     | non-negative real                                         |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | 5.29 (e.g., 5.29 inches)                                  |
|          |                                                           |
| (E       | 28 (e.g., 28 mm)                                          |
| xamples) |                                                           |
+----------+-----------------------------------------------------------+
| Usage    | The unit of measure (inches, meters, etc.) used must be   |
| Notes    | specified in 4.1.8.1 **Source_YdimensionUnit.**           |
|          |                                                           |
|          | If unknown or impractical to record, the value of         |
|          | **Source_Ydimension** may be deduced. See,                |
|          | **SamplingFrequencyPlane** (4.1.6).                       |
+----------+-----------------------------------------------------------+
| Use      | System, accurate output of file to print/film (*size*)    |
|          |                                                           |
|          | Manager, one of the quantitative metrics to evaluate      |
|          | image quality                                             |
+----------+-----------------------------------------------------------+

#### Source_YdimensionUnit

+----------+-----------------------------------------------------------+
| De       | *Specifies the unit of measure used in 4.1.8*             |
| finition | **Source_Ydimension**                                     |
+----------+-----------------------------------------------------------+
| Type     | string                                                    |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | inches                                                    |
|          |                                                           |
| (E       | mm                                                        |
| xamples) |                                                           |
+----------+-----------------------------------------------------------+
| Notes    |                                                           |
+----------+-----------------------------------------------------------+
| Use      | System, accurate output of file to print/film (*size*)    |
|          |                                                           |
|          | Manager, one of the quantitative metrics to evaluate      |
|          | image quality                                             |
+----------+-----------------------------------------------------------+

## Energetics 

This section is meant to provide nominal accuracy and precision data on
the global energetic response and archiving space of the imaging device
and subsequent digital file. The data herein apply to all pixels in the
digital image, except as noted. This section is purposely titled
*Energetics* to not mislead the user with respect to the visual
interpretation of the data contained in the digital image. While
interpretative values are provided for each data element these are
considered nominal and not absolute. Only with careful populating of
*Sub-section 4.3 Targets* elements can improved data interpretation be
realized.

### BitsPerSample

+----------+--------+--------------------------------------------------+
| De       | *The   |                                                  |
| finition | number |                                                  |
|          | of     |                                                  |
|          | bits   |                                                  |
|          | per    |                                                  |
|          | com    |                                                  |
|          | ponent |                                                  |
|          | for    |                                                  |
|          | each   |                                                  |
|          | pixel. |                                                  |
|          | This   |                                                  |
|          | field  |                                                  |
|          | pr     |                                                  |
|          | ovides |                                                  |
|          | N      |                                                  |
|          | values |                                                  |
|          | dep    |                                                  |
|          | ending |                                                  |
|          | upon*  |                                                  |
|          | *      |                                                  |
|          | *Sampl |                                                  |
|          | esPerP |                                                  |
|          | ixel** |                                                  |
|          | *pre   |                                                  |
|          | sent.* |                                                  |
+----------+--------+--------------------------------------------------+
| Type     | enum   |                                                  |
|          | erated |                                                  |
|          | type   |                                                  |
|          | (rest  |                                                  |
|          | ricted |                                                  |
|          | to     |                                                  |
|          | list)  |                                                  |
+----------+--------+--------------------------------------------------+
| Required | M      |                                                  |
+----------+--------+--------------------------------------------------+
| Re       | N      |                                                  |
| peatable |        |                                                  |
+----------+--------+--------------------------------------------------+
| Values   | 1      | = 1-bit (bitonal)                                |
|          |        |                                                  |
|          | 4      | = 4-bit grayscale                                |
|          |        |                                                  |
|          | 8      | = 8-bit grayscale or palletizedcolor             |
|          |        |                                                  |
|          | 8,8,8  | = RGB                                            |
|          |        |                                                  |
|          | 16     | = TIFF, HDR (high dynamic range)                 |
|          | ,16,16 |                                                  |
|          |        | = CMYK                                           |
|          | 8      |                                                  |
|          | ,8,8,8 |                                                  |
+----------+--------+--------------------------------------------------+
| Usage    | "Note  |                                                  |
| Notes    | that   |                                                  |
|          | this   |                                                  |
|          | field  |                                                  |
|          | allows |                                                  |
|          | a      |                                                  |
|          | dif    |                                                  |
|          | ferent |                                                  |
|          | number |                                                  |
|          | of     |                                                  |
|          | bits   |                                                  |
|          | per    |                                                  |
|          | com    |                                                  |
|          | ponent |                                                  |
|          | for    |                                                  |
|          | each   |                                                  |
|          | com    |                                                  |
|          | ponent |                                                  |
|          | c      |                                                  |
|          | orresp |                                                  |
|          | onding |                                                  |
|          | to a   |                                                  |
|          | pixel. |                                                  |
|          | For    |                                                  |
|          | ex     |                                                  |
|          | ample, |                                                  |
|          | RGB    |                                                  |
|          | color  |                                                  |
|          | data   |                                                  |
|          | could  |                                                  |
|          | use a  |                                                  |
|          | dif    |                                                  |
|          | ferent |                                                  |
|          | number |                                                  |
|          | of     |                                                  |
|          | bits   |                                                  |
|          | per    |                                                  |
|          | com    |                                                  |
|          | ponent |                                                  |
|          | for    |                                                  |
|          | each   |                                                  |
|          | of the |                                                  |
|          | three  |                                                  |
|          | color  |                                                  |
|          | panes. |                                                  |
|          | Most   |                                                  |
|          | RGB    |                                                  |
|          | files  |                                                  |
|          | will   |                                                  |
|          | have   |                                                  |
|          | the    |                                                  |
|          | same   |                                                  |
|          | number |                                                  |
|          | of     |                                                  |
|          | **Bit  |                                                  |
|          | sPerSa |                                                  |
|          | mple** |                                                  |
|          | for    |                                                  |
|          | each   |                                                  |
|          | comp   |                                                  |
|          | onent. |                                                  |
|          | Even   |                                                  |
|          | in     |                                                  |
|          | this   |                                                  |
|          | case,  |                                                  |
|          | [the   |                                                  |
|          | writer |                                                  |
|          | must   |                                                  |
|          | write  |                                                  |
|          | all    |                                                  |
|          | three  |                                                  |
|          | val    |                                                  |
|          | ues]{. |                                                  |
|          | underl |                                                  |
|          | ine}." |                                                  |
|          | (TIFF, |                                                  |
|          | p29,   |                                                  |
|          | em     |                                                  |
|          | phasis |                                                  |
|          | added) |                                                  |
+----------+--------+--------------------------------------------------+
| Use      | System |                                                  |
|          | (      |                                                  |
|          | *tone, |                                                  |
|          | c      |                                                  |
|          | olor*) |                                                  |
|          |        |                                                  |
|          | Ma     |                                                  |
|          | nager, |                                                  |
|          | one of |                                                  |
|          | the    |                                                  |
|          | quanti |                                                  |
|          | tative |                                                  |
|          | m      |                                                  |
|          | etrics |                                                  |
|          | to     |                                                  |
|          | ev     |                                                  |
|          | aluate |                                                  |
|          | image  |                                                  |
|          | q      |                                                  |
|          | uality |                                                  |
+----------+--------+--------------------------------------------------+

### SamplesPerPixel

+----------+-----------------------------------------------------------+
| De       | *Designates the number of color components per pixel.*    |
| finition |                                                           |
+----------+-----------------------------------------------------------+
| Type     | enumerated type (restricted to external standard)         |
+----------+-----------------------------------------------------------+
| Required | M                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | 1 = when **PhotometricInterpretation** = 0 or 1           |
|          |                                                           |
|          | 3 = when **PhotometricInterpretation** = 2 (RGB), 6       |
|          | (YcbCr)                                                   |
|          |                                                           |
|          | 4 = when **PhotometricInterpretation** = 5 (CMYK)         |
+----------+-----------------------------------------------------------+
| Usage    | Values drawn from TIFF (p39, 69) and TIFF/EP (5.2.19).    |
| Notes    |                                                           |
|          | See also **BitsPerSample**,                               |
|          | **PhotometricInterpretation**, **ExtraSamples**.          |
+----------+-----------------------------------------------------------+
| Use      | System (*tone, color*)                                    |
|          |                                                           |
|          | Manager, one of the quantitative metrics to evaluate      |
|          | image quality                                             |
+----------+-----------------------------------------------------------+

### Extrasamples

+----------+-----------------------------------------------------------+
| De       | *Specifies that each pixel has* M *extra components whose |
| finition | interpretation is defined by one of the values listed     |
|          | below*.                                                   |
+----------+-----------------------------------------------------------+
| Type     | enumerated type (restricted to external standard)         |
+----------+-----------------------------------------------------------+
| Required | MA                                                        |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | 0 = unspecified data                                      |
|          |                                                           |
|          | 1 = associated alpha data (with pre-multiplied color)     |
|          |                                                           |
|          | 2 = unassociated alpha data                               |
|          |                                                           |
|          | 3 = range or depth data                                   |
+----------+-----------------------------------------------------------+
| Notes    | See also: TIFF 338 (*Baseline [mandatory if               |
|          | applicable]{.underline}*, p31).                           |
|          |                                                           |
|          | This field must be present if there are extra samples in  |
|          | the image data. When this field is used,                  |
|          | **SamplesPerPixel** (3.2.2) has a value greater than      |
|          | **PhotometricInterpretation** (2.1.4) suggests.           |
+----------+-----------------------------------------------------------+
| Use      | System                                                    |
+----------+-----------------------------------------------------------+

###  Colormap

*This field defines a Red-Green-Blue color map (often called a lookup
table) for palette-color images. The colormap or lookup table is a
series of 4 bytes of information for **each** of the 256 colors. Since
the table must be complete in order to allow for color mapping, the four
elements comprising Colormap will be repeated 256 times (to allow for 0
through 255).*

####  Colormap_BitCodeValue

  ------------ -----------------------------------------------------------
  Definition   *This field provides the Bit Code Value or reference point
               for a particular RGB triplet of the Colormap (often called
               a lookup table) for palette-color images.*

  Type         Enumerated type (restricted to external standard)

  Required     MA (for palettized color images,
               **PhotometricInterpretation** = 3)

  Repeatable   R

  Values       Possible values are 0-255.

  Usage Notes  As noted in the TIFF definition, **Colormap** is synonymous
               with color lookup table (CLUT). When
               **PhotometricInterpretation** = 2, there is no
               **Colormap**; in other words, there is no **Colormap** in
               RGB images (TIFF, p24).

  Use          System (*tone, color*)
  ------------ -----------------------------------------------------------

#### Colormap_RedValue

  ------------ -----------------------------------------------------------
  Definition   *This field provides the Red Value within a particular RGB
               triplet of the Colormap (often called a lookup table) for
               palette-color images. Particular triplet is reference in
               4.2.4.1 Colormap_BitCodeValue.*

  Type         Enumerated type (restricted to external standard)

  Required     MA (for palettized color images,
               **PhotometricInterpretation** = 3)

  Repeatable   R

  Values       Possible values are 0-255.

  Usage Notes  As noted in the TIFF definition, **Colormap** is synonymous
               with color lookup table (CLUT). When
               **PhotometricInterpretation** = 2, there is no
               **Colormap**; in other words, there is no **Colormap** in
               RGB images (TIFF, p24).

  Use          System (*tone, color*)
  ------------ -----------------------------------------------------------

#### Colormap_GreenValue

  ------------ -----------------------------------------------------------
  Definition   *This field provides the GreenValue within a particular RGB
               triplet of the Colormap (often called a lookup table) for
               palette-color images. Particular triplet is reference in
               4.2.4.1 Colormap_BitCodeValue.*

  Type         Enumerated type (restricted to external standard)

  Required     MA (for palettized color images,
               **PhotometricInterpretation** = 3)

  Repeatable   R

  Values       Possible values are 0-255.

  Usage Notes  As noted in the TIFF definition, **Colormap** is synonymous
               with color lookup table (CLUT). When
               **PhotometricInterpretation** = 2, there is no
               **Colormap**; in other words, there is no **Colormap** in
               RGB images (TIFF, p24).

  Use          System (*tone, color*)
  ------------ -----------------------------------------------------------

#### Colormap_BlueValue

  ------------ -----------------------------------------------------------
  Definition   *This field provides the BlueValue within a particular RGB
               triplet of the Colormap (often called a lookup table) for
               palette-color images. Particular triplet is reference in
               4.2.4.1 Colormap_BitCodeValue.*

  Type         Enumerated type (restricted to external standard)

  Required     MA (for palettized color images,
               **PhotometricInterpretation** = 3)

  Repeatable   R

  Values       Possible values are 0-255.

  Usage Notes  As noted in the TIFF definition, **Colormap** is synonymous
               with color lookup table (CLUT). When
               **PhotometricInterpretation** = 2, there is no
               **Colormap**; in other words, there is no **Colormap** in
               RGB images (TIFF, p24).

  Use          System (*tone, color*)
  ------------ -----------------------------------------------------------

### GrayResponseCurve

+----------+-----------------------------------------------------------+
| De       | *For grayscale data, the optical density of each possible |
| finition | pixel value.*                                             |
+----------+-----------------------------------------------------------+
| Type     | enumerated type (restricted to external standard)         |
+----------+-----------------------------------------------------------+
| Required | R                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | N = 2\*\***BitsPerSample**                                |
+----------+-----------------------------------------------------------+
| Usage    | See also: TIFF 290 (*Baseline [optional]{.underline}*,    |
| Note     | p33)                                                      |
|          |                                                           |
|          | Must be accompanied by **GrayResponseUnit** (4.2.6)       |
|          |                                                           |
|          | (The reference data type accommodates the practice of     |
|          | generating a response curve at the beginning of each      |
|          | session.)                                                 |
+----------+-----------------------------------------------------------+
| Use      | System (objective assessment of optical density)          |
+----------+-----------------------------------------------------------+

### GrayResponseUnit

+----------+-----------------------------------------------------------+
| De       | *The precision of the information contained in the        |
| finition | GrayResponseCurve.*                                       |
+----------+-----------------------------------------------------------+
| Type     | enumerated type (restricted to list)                      |
+----------+-----------------------------------------------------------+
| Required | R                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | 1 = Number represents tenths of a unit.                   |
|          |                                                           |
|          | 2 = Number represents hundredths of a unit.               |
|          |                                                           |
|          | 3 = Number represents thousandths of a unit.              |
|          |                                                           |
|          | 4 = Number represents ten-thousandths of a unit.          |
|          |                                                           |
|          | 5 = Number represents hundred-thousandths of a unit.      |
+----------+-----------------------------------------------------------+
| Usage    | Modifies **GrayResponseCurve** (4.2.5)                    |
| Note     |                                                           |
+----------+-----------------------------------------------------------+
| Use      | System (objective assessment of optical density)          |
+----------+-----------------------------------------------------------+

### WhitePoint

*The white point chromaticity of the effective illumination source of
the capture process. White point is comprised of two values:
WhitePoint_Xvalue and WhitePoint_Yvalue.* *The ordering is white \[x\],
white \[y\].*

####  WhitePoint_Xvalue

+----------+-----------------------------------------------------------+
| De       | *The X value for the white point chromaticity of the      |
| finition | effective illumination source of the capture process.*    |
+----------+-----------------------------------------------------------+
| Type     | enumerated type (restricted to list)                      |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | Y                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | 3127/10000                                                |
|          |                                                           |
| (        |                                                           |
| Example) |                                                           |
+----------+-----------------------------------------------------------+
| Usage    | These values specify the 1931 CIE xy chromaticities of    |
| Notes    | the effective illumination (i.e., filter/light source     |
|          | combination) at capture. They ***do not*** have any       |
|          | relation to location or directional coordinates. For more |
|          | information about the 1931 CIE standard colorimetric      |
|          | observer, see http://www.color.org/profile.html.          |
|          |                                                           |
|          | The chromaticity of the white point of the image is       |
|          | encoded using the mediaWhitePointTag values within the    |
|          | ***InterColorProfile*** tag value." (TIFF/EP 4.5 Camera   |
|          | Color Space Information)                                  |
+----------+-----------------------------------------------------------+
| Use      | System (objective assessment of colorimetry)              |
+----------+-----------------------------------------------------------+

#### WhitePoint_Yvalue

+----------+-----------------------------------------------------------+
| De       | *The Y value for the white point chromaticity of the      |
| finition | effective illumination source of the capture process.*    |
+----------+-----------------------------------------------------------+
| Type     | enumerated type (restricted to list)                      |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | Y                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | 3290/10000                                                |
|          |                                                           |
| (        |                                                           |
| Example) |                                                           |
+----------+-----------------------------------------------------------+
| Usage    | These values specify the 1931 CIE xy chromaticities of    |
| Notes    | the effective illumination (i.e., filter/light source     |
|          | combination) at capture. They ***do not*** have any       |
|          | relation to location or directional coordinates. For more |
|          | information about the 1931 CIE standard colorimetric      |
|          | observer, see http://www.color.org/profile.html.          |
|          |                                                           |
|          | The chromaticity of the white point of the image is       |
|          | encoded using the mediaWhitePointTag values within the    |
|          | ***InterColorProfile*** tag value." (TIFF/EP 4.5 Camera   |
|          | Color Space Information)                                  |
+----------+-----------------------------------------------------------+
| Use      | System (objective assessment of colorimetry)              |
+----------+-----------------------------------------------------------+

[]{.mark}

[]{.mark}

### PrimaryChromaticities

*The chromaticities of the primary colors of the imaging process.
PrimaryChromaticities is comprised of six values. The ordering is red
\[x\], red \[y\], green\[x\], green\[y\],blue\[x\],blue\[y\].*

####  PrimaryChromaticities_RedX

+---------+------------------------------------------------------------+
| Def     | *This specifies the Red \[x} value for the chromaticities  |
| inition | of the primary colors of the imaging process.*             |
+---------+------------------------------------------------------------+
| Type    | enumerated type (restricted to list)                       |
+---------+------------------------------------------------------------+
| R       | O                                                          |
| equired |                                                            |
+---------+------------------------------------------------------------+
| Rep     | Y                                                          |
| eatable |                                                            |
+---------+------------------------------------------------------------+
| Values  | 640/1000                                                   |
|         |                                                            |
| (E      |                                                            |
| xample) |                                                            |
+---------+------------------------------------------------------------+
| Usage   | These values specify the 1931 CIE xy chromaticities of the |
| Note    | capture primaries. The ordering is red \[x\], red \[y\],   |
|         | green\[x\], green\[y\],blue\[x\],blue\[y\].                |
|         |                                                            |
|         | Note: "The chromaticities of the primaries of the image    |
|         | are encoded using the redColorantTag, greenColorTag, and   |
|         | blueColorantTag values within the ***InterColorProfile***  |
|         | tag value." (TIFF/EP 4.5 Camera Color Space Information)   |
+---------+------------------------------------------------------------+
| Use     | System (objective assessment of colorimetry)               |
+---------+------------------------------------------------------------+

#### PrimaryChromaticities_RedY

+---------+------------------------------------------------------------+
| Def     | *This specifies the Red \[y} value for the chromaticities  |
| inition | of the primary colors of the imaging process.*             |
+---------+------------------------------------------------------------+
| Type    | enumerated type (restricted to list)                       |
+---------+------------------------------------------------------------+
| R       | O                                                          |
| equired |                                                            |
+---------+------------------------------------------------------------+
| Rep     | Y                                                          |
| eatable |                                                            |
+---------+------------------------------------------------------------+
| Values  | 330/1000                                                   |
|         |                                                            |
| (E      |                                                            |
| xample) |                                                            |
+---------+------------------------------------------------------------+
| Usage   | These values specify the 1931 CIE xy chromaticities of the |
| Note    | capture primaries. The ordering is red \[x\], red \[y\],   |
|         | green\[x\], green\[y\],blue\[x\],blue\[y\].                |
|         |                                                            |
|         | Note: "The chromaticities of the primaries of the image    |
|         | are encoded using the redColorantTag, greenColorTag, and   |
|         | blueColorantTag values within the ***InterColorProfile***  |
|         | tag value." (TIFF/EP 4.5 Camera Color Space Information)   |
+---------+------------------------------------------------------------+
| Use     | System (objective assessment of colorimetry)               |
+---------+------------------------------------------------------------+

#### PrimaryChromaticities_GreenX

+---------+------------------------------------------------------------+
| Def     | *This specifies the Green \[x} value for the               |
| inition | chromaticities of the primary colors of the imaging        |
|         | process.*                                                  |
+---------+------------------------------------------------------------+
| Type    | enumerated type (restricted to list)                       |
+---------+------------------------------------------------------------+
| R       | O                                                          |
| equired |                                                            |
+---------+------------------------------------------------------------+
| Rep     | Y                                                          |
| eatable |                                                            |
+---------+------------------------------------------------------------+
| Values  | 300/1000                                                   |
|         |                                                            |
| (E      |                                                            |
| xample) |                                                            |
+---------+------------------------------------------------------------+
| Usage   | These values specify the 1931 CIE xy chromaticities of the |
| Note    | capture primaries. The ordering is red \[x\], red \[y\],   |
|         | green\[x\], green\[y\],blue\[x\],blue\[y\].                |
|         |                                                            |
|         | Note: "The chromaticities of the primaries of the image    |
|         | are encoded using the redColorantTag, greenColorTag, and   |
|         | blueColorantTag values within the ***InterColorProfile***  |
|         | tag value." (TIFF/EP 4.5 Camera Color Space Information)   |
+---------+------------------------------------------------------------+
| Use     | System (objective assessment of colorimetry)               |
+---------+------------------------------------------------------------+

#### PrimaryChromaticities_GreenY

+---------+------------------------------------------------------------+
| Def     | *This specifies the Green \[y} value for the               |
| inition | chromaticities of the primary colors of the imaging        |
|         | process.*                                                  |
+---------+------------------------------------------------------------+
| Type    | enumerated type (restricted to list)                       |
+---------+------------------------------------------------------------+
| R       | O                                                          |
| equired |                                                            |
+---------+------------------------------------------------------------+
| Rep     | Y                                                          |
| eatable |                                                            |
+---------+------------------------------------------------------------+
| Values  | 600/1000                                                   |
|         |                                                            |
| (E      |                                                            |
| xample) |                                                            |
+---------+------------------------------------------------------------+
| Usage   | These values specify the 1931 CIE xy chromaticities of the |
| Note    | capture primaries. The ordering is red \[x\], red \[y\],   |
|         | green\[x\], green\[y\],blue\[x\],blue\[y\].                |
|         |                                                            |
|         | Note: "The chromaticities of the primaries of the image    |
|         | are encoded using the redColorantTag, greenColorTag, and   |
|         | blueColorantTag values within the ***InterColorProfile***  |
|         | tag value." (TIFF/EP 4.5 Camera Color Space Information)   |
+---------+------------------------------------------------------------+
| Use     | System (objective assessment of colorimetry)               |
+---------+------------------------------------------------------------+

#### PrimaryChromaticities_BlueX

+---------+------------------------------------------------------------+
| Def     | *This specifies the Blue \[x} value for the chromaticities |
| inition | of the primary colors of the imaging process.*             |
+---------+------------------------------------------------------------+
| Type    | enumerated type (restricted to list)                       |
+---------+------------------------------------------------------------+
| R       | O                                                          |
| equired |                                                            |
+---------+------------------------------------------------------------+
| Rep     | Y                                                          |
| eatable |                                                            |
+---------+------------------------------------------------------------+
| Values  | 150/1000                                                   |
|         |                                                            |
| (E      |                                                            |
| xample) |                                                            |
+---------+------------------------------------------------------------+
| Usage   | These values specify the 1931 CIE xy chromaticities of the |
| Note    | capture primaries. The ordering is red \[x\], red \[y\],   |
|         | green\[x\], green\[y\],blue\[x\],blue\[y\].                |
|         |                                                            |
|         | Note: "The chromaticities of the primaries of the image    |
|         | are encoded using the redColorantTag, greenColorTag, and   |
|         | blueColorantTag values within the ***InterColorProfile***  |
|         | tag value." (TIFF/EP 4.5 Camera Color Space Information)   |
+---------+------------------------------------------------------------+
| Use     | System (objective assessment of colorimetry)               |
+---------+------------------------------------------------------------+

#### PrimaryChromaticities_BlueY

+---------+------------------------------------------------------------+
| Def     | *This specifies the Blue \[y} value for the chromaticities |
| inition | of the primary colors of the imaging process.*             |
+---------+------------------------------------------------------------+
| Type    | enumerated type (restricted to list)                       |
+---------+------------------------------------------------------------+
| R       | O                                                          |
| equired |                                                            |
+---------+------------------------------------------------------------+
| Rep     | Y                                                          |
| eatable |                                                            |
+---------+------------------------------------------------------------+
| Values  | 60/1000                                                    |
|         |                                                            |
| (E      |                                                            |
| xample) |                                                            |
+---------+------------------------------------------------------------+
| Usage   | These values specify the 1931 CIE xy chromaticities of the |
| Note    | capture primaries. The ordering is red \[x\], red \[y\],   |
|         | green\[x\], green\[y\],blue\[x\],blue\[y\].                |
|         |                                                            |
|         | Note: "The chromaticities of the primaries of the image    |
|         | are encoded using the redColorantTag, greenColorTag, and   |
|         | blueColorantTag values within the ***InterColorProfile***  |
|         | tag value." (TIFF/EP 4.5 Camera Color Space Information)   |
+---------+------------------------------------------------------------+
| Use     | System (objective assessment of colorimetry)               |
+---------+------------------------------------------------------------+

## TargetData

Targets are used as concise physical benchmarks for absolute energetic
and spatial information about the item of interest at time of capture.
They are, in essence, Rosetta stones for the source. As such, their
utility is undisputed whenever corrections or faithful reconstructions
of the source document are required.

Depending on workflows and philosophy, targets can be considered as
either external or internal to a digital image. Internal targets are
part of a digital image by being within the field of view at time of
capture. External targets are typically captured session-to-session and
usually give temporally sparse information between image captures. For
stable capture environments their utility can be equivalent to internal
targets. Since they are not part of the digital image itself, their
location must be managed in order to maintain a thread to the source.

The following diagram illustrates the logical structure of the
TargetData.

**Figure 4** -- Logical Structure of TargetData

### TargetType

+----------+-----------------------------------------------------------+
| De       | *This element identifies the targets as either internal   |
| finition | or external.*                                             |
+----------+-----------------------------------------------------------+
| Type     | enumerated type (restricted to list)                      |
+----------+-----------------------------------------------------------+
| Required | R                                                         |
+----------+-----------------------------------------------------------+
| Re       | Y                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | 0 = external                                              |
|          |                                                           |
|          | 1 = internal                                              |
+----------+-----------------------------------------------------------+
| Usage    | Internal targets are targets which appear within the      |
| Notes    | frame of the digitized item. External targets *do not*    |
|          | appear within the frame with the digitized item and are   |
|          | separate files, usually full frame targets used for       |
|          | calibration purposes.                                     |
|          |                                                           |
|          | The Count for this field = 1. Each target shall be        |
|          | represented by its own logical metadata block. See        |
|          | diagram of proposed **TargetData** structure (4.3).       |
|          |                                                           |
|          | When value = 1, the **ImageData** field shall not be      |
|          | used. See 4.3.3 **ImageData**.                            |
+----------+-----------------------------------------------------------+
| Use      | Manager                                                   |
+----------+-----------------------------------------------------------+

### TargetID

*Identifies the target manufacturer or organization, name, and version
number or media.*

#### TargetIDManufacturer

+----------+-----------------------------------------------------------+
| De       | *Identifies the manufacturer or organization that created |
| finition | the target.*                                              |
+----------+-----------------------------------------------------------+
| Type     | string                                                    |
+----------+-----------------------------------------------------------+
| Required | R                                                         |
+----------+-----------------------------------------------------------+
| Re       | Y                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | Gretag-Macbeth                                            |
|          |                                                           |
| (E       | Eastman Kodak                                             |
| xamples) |                                                           |
|          | Applied Image Inc                                         |
+----------+-----------------------------------------------------------+
| Usage    | The Count for this multi-layered data element = 1. Each   |
| Notes    | target shall be represented by its own logical metadata   |
|          | block. See diagram of proposed **TargetData** structure   |
|          | (4.3).                                                    |
+----------+-----------------------------------------------------------+
| Use      | Manager (objective measure of system quality)             |
+----------+-----------------------------------------------------------+

#### TargetIDName

+----------+-----------------------------------------------------------+
| De       | *Identifies the name of the target.*                      |
| finition |                                                           |
+----------+-----------------------------------------------------------+
| Type     | string                                                    |
+----------+-----------------------------------------------------------+
| Required | R                                                         |
+----------+-----------------------------------------------------------+
| Re       | Y                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | ColorChecker                                              |
|          |                                                           |
| (E       | Q60                                                       |
| xamples) |                                                           |
|          | ISO 16067                                                 |
+----------+-----------------------------------------------------------+
| Usage    | The Count for this multi-layered data element = 1. Each   |
| Notes    | target shall be represented by its own logical metadata   |
|          | block. See diagram of proposed **TargetData** structure   |
|          | (4.3).                                                    |
+----------+-----------------------------------------------------------+
| Use      | Manager (objective measure of system quality)             |
+----------+-----------------------------------------------------------+

#### TargetIDNo

+----------+-----------------------------------------------------------+
| De       | *Identifies the version or number of the target.*         |
| finition |                                                           |
+----------+-----------------------------------------------------------+
| Type     | string                                                    |
+----------+-----------------------------------------------------------+
| Required | R                                                         |
+----------+-----------------------------------------------------------+
| Re       | Y                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | ItemXXX                                                   |
|          |                                                           |
| (E       | Version2                                                  |
| xamples) |                                                           |
+----------+-----------------------------------------------------------+
| Usage    | The Count for this multi-layered data element = 1. Each   |
| Notes    | target shall be represented by its own logical metadata   |
|          | block. See diagram of proposed **TargetData** structure   |
|          | (4.3).                                                    |
+----------+-----------------------------------------------------------+
| Use      | Manager (objective measure of system quality)             |
+----------+-----------------------------------------------------------+

#### TargetIDMedia

+----------+-----------------------------------------------------------+
| De       | *Identifies the media of the target.*                     |
| finition |                                                           |
+----------+-----------------------------------------------------------+
| Type     | string                                                    |
+----------+-----------------------------------------------------------+
| Required | MA                                                        |
+----------+-----------------------------------------------------------+
| Re       | Y                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | Ektachrome Transparency                                   |
|          |                                                           |
| (E       |                                                           |
| xamples) |                                                           |
+----------+-----------------------------------------------------------+
| Usage    | The Count for this multi-layered data element = 1. Each   |
| Notes    | target shall be represented by its own logical metadata   |
|          | block. See diagram of proposed **TargetData** structure   |
|          | (4.3).                                                    |
+----------+-----------------------------------------------------------+
| Use      | Manager (objective measure of system quality)             |
+----------+-----------------------------------------------------------+

### ImageData

+----------+-----------------------------------------------------------+
| De       | *Identifies the path where the digital image of the       |
| finition | reference target identified in* 4.3.2 **TargetID** *is    |
|          | located.*                                                 |
+----------+-----------------------------------------------------------+
| Type     | reference                                                 |
+----------+-----------------------------------------------------------+
| Required | R (applicable only if 4.3.1 **TargetType** = 0)           |
+----------+-----------------------------------------------------------+
| Re       | Y                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | \[Filename\]                                              |
|          |                                                           |
|          | \[URN\]                                                   |
+----------+-----------------------------------------------------------+
| Usage    | The Count for this field = 1. Each target shall be        |
| Notes    | represented by its own logical metadata block. See        |
|          | diagram of proposed **TargetData** structure (4.3).       |
+----------+-----------------------------------------------------------+
| Use      | System (to create **PerformanceData** and/or              |
|          | **Profiles**)                                             |
+----------+-----------------------------------------------------------+

### PerformanceData

+----------+-----------------------------------------------------------+
| De       | *Identifies the path of the file that contains the image  |
| finition | performance data relative to the target identified in*    |
|          | 4.3.2 **TargetID**.                                       |
+----------+-----------------------------------------------------------+
| Type     | reference                                                 |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | Y                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | \[filename\]                                              |
|          |                                                           |
|          | \[URN\]                                                   |
+----------+-----------------------------------------------------------+
| Usage    | **PerformanceData** refers to standards-based             |
| Notes    | characterizations of system performance according to      |
|          | measurements of spatial resolution, OECF, noise, and      |
|          | other attributes important to image quality.              |
|          |                                                           |
|          | [Standards]{.underline}: Electronic imaging standards     |
|          | through the International Imaging Industry Association    |
|          | (I3A) (http://www.i3a.org/it10.html) provide example uses |
|          | and reporting formats for proposed ISO performance data   |
|          | characterization. These include, for example,             |
|          | GrayResponseCurve (ISO 14524) and Spatial Resolution      |
|          | Measurement (ISO 16067).                                  |
+----------+-----------------------------------------------------------+
| Use      | System                                                    |
|          |                                                           |
|          | Manager (objective measure of quality of                  |
|          | **ScanningSystem**)                                       |
+----------+-----------------------------------------------------------+

### Profiles

+----------+-----------------------------------------------------------+
| De       | *Identifies the path of the file that contains the ICC    |
| finition | color profile or other image management profiles.*        |
+----------+-----------------------------------------------------------+
| Type     | reference                                                 |
+----------+-----------------------------------------------------------+
| Required | O                                                         |
+----------+-----------------------------------------------------------+
| Re       | Y                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | \[filename\]                                              |
|          |                                                           |
| (E       | \[URL\] or \[URN\]                                        |
| xamples) |                                                           |
+----------+-----------------------------------------------------------+
| Usage    | The Count for this field = 1. Each target shall be        |
| Notes    | represented by its own logical metadata block. See        |
|          | diagram of proposed **TargetData** structure (4.3).       |
+----------+-----------------------------------------------------------+
| Use      | System (tone/color)                                       |
+----------+-----------------------------------------------------------+

# Change History

Change History metadata serves the function of documenting processes
applied to image data over the life cycle of an image. As defined below,
"processes" result either in *editing* or in *transforming* the image.

The Image Creation metadata block (Section 3) is used to document the
source, scanning system, and capture settings used to create an image
from an analog source. The metadata blocks in Change History are used to
document the source, systems, and settings used in all subsequent
digital-to-digital operations.

The Change History metadata contains:

-   A summary of image processing operations applied to an image

-   Previous versions of the technical metadata if image transformation
    creates a new generation of image.

However,

-   The Change History metadata is not designed to be used to reverse
    image-editing operations, though documentation of change history and
    preservation of essential technical metadata may allow a *simulated*
    return to original image data.

```{=html}
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```
-   The Change History metadata is not designed to be used to
    authenticate an image. Consistent with other metadata blocks in this
    data dictionary, Change History limits its focus to quality
    assessment and preservation of *image data* and thus may not be
    sufficient to meet requirements defined for image integrity and
    authenticity.

The following assumption and definitions govern the proposed logical
structure for Change History:

1.  *Image processing* may occur multiple times throughout the life
    cycle of an image.

2.  The image life cycle may consist of multiple generations of the
    image. The logical structure of this standard allows for the
    *addition* of change history information to the existing metadata.

3.  **Image *transformation* refers to any processing that produces a
    new generation image (changes to any of the values in *Section 2.1
    Format* create a new *generation* of the image)**. In the case of
    image transformation, Section 5.2 is used to track the metadata from
    the previous generation of the image. See Figure 5 for a visual
    representation of this.

4.  All other processes (i.e., those that do [not]{.underline} create
    new values in Section 2.1) are classified as *image editing* and are
    recorded only in Section 5.1.

NISO Technical Metadata for Images

**Figure 5** -- Logical Structure of Change History

## Image Processing

This metadata block contains a summary of image processing operations
(i.e., digital-to-digital conversion processes) that may be used for
future quality assessment of the image data.

Note: Fields 5.1.1-5.1.5 define a single metadata block to document a
single processing action (e.g., image cropped) [or]{.underline} a single
set of processing actions (e.g., subsampling, application of ICC
profile, image transformation).

The logical structure of this metadata block presumes that image
processing will occur multiple times (Fig. 5). To document a full change
history applied to an image, each metadata block should not be
overwritten by subsequent processing actions.

### DateTimeProcessed

+----------+-----------------------------------------------------------+
| De       | *Date or DateTime image was processed.*                   |
| finition |                                                           |
+----------+-----------------------------------------------------------+
| Type     | DateTime                                                  |
+----------+-----------------------------------------------------------+
| Required | MA                                                        |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | YYYY-MM-DD                                                |
+----------+-----------------------------------------------------------+
| Usage    | Use ISO 8601 numeric representations of date and time.    |
| Notes    |                                                           |
|          | If multiple processing steps are recorded together in     |
|          | 5.1.5, the DateTime shall refer to the final (i.e., most  |
|          | recent) **ProcessingAction**.                             |
|          |                                                           |
|          | The value for this field shall be null for images that    |
|          | receive no processing following image conversion, as      |
|          | documented in *3.1 Image Creation*.                       |
+----------+-----------------------------------------------------------+
| Use      | Manager                                                   |
+----------+-----------------------------------------------------------+

### SourceData

+----------+-----------------------------------------------------------+
| De       | *This field specifies either a reference to the source    |
| finition | image data (digital file), or a brief description of the  |
|          | file, from which the processed digital image file was     |
|          | created.*                                                 |
+----------+-----------------------------------------------------------+
| Type     | reference or string                                       |
+----------+-----------------------------------------------------------+
| Required | MA                                                        |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | \[local filename\]                                        |
|          |                                                           |
| (E       | \[URL\] or \[URN\] or \[Name Resolution Service name of   |
| xamples) | file stored in repository\]                               |
|          |                                                           |
|          | \[Photo CD image (location or identifier)\]               |
+----------+-----------------------------------------------------------+
| Usage    | The value for this field shall be null for images that    |
| Notes    | receive no processing following image conversion, as      |
|          | documented in *3.1 Image Creation*.                       |
+----------+-----------------------------------------------------------+
| Use      | Manager                                                   |
+----------+-----------------------------------------------------------+

### ProcessingAgency

+----------+-----------------------------------------------------------+
| De       | *Identifies the organization-level producer(s) of the     |
| finition | processed image.*                                         |
+----------+-----------------------------------------------------------+
| Type     | string                                                    |
+----------+-----------------------------------------------------------+
| Required | R                                                         |
+----------+-----------------------------------------------------------+
| Re       | Y                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | Luna Imaging, Inc.                                        |
|          |                                                           |
| (E       | JJT, Inc.                                                 |
| xamples) |                                                           |
|          | University of Michigan Digital Library Production         |
|          | Services                                                  |
|          |                                                           |
|          | Harvard College Library Digital Imaging Group             |
+----------+-----------------------------------------------------------+
| Usage    |                                                           |
| Notes    |                                                           |
+----------+-----------------------------------------------------------+
| Use      | Manager                                                   |
+----------+-----------------------------------------------------------+

### ProcessingSoftware

#### ProcessingSoftwareName

+----------+-----------------------------------------------------------+
| De       | *The name of the image processing software used to edit   |
| finition | or transform the image data.*                             |
+----------+-----------------------------------------------------------+
| Type     | string                                                    |
+----------+-----------------------------------------------------------+
| Required | R                                                         |
+----------+-----------------------------------------------------------+
| Re       | N                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | Adobe Photoshop                                           |
|          |                                                           |
| (        |                                                           |
| Example) |                                                           |
+----------+-----------------------------------------------------------+
| Usage    | Record version number of software in 5.1.4.2              |
| Notes    | **ProcessingSoftwareVersion**.                            |
+----------+-----------------------------------------------------------+
| Use      | Manager                                                   |
+----------+-----------------------------------------------------------+

#### ProcessingSoftwareVersion

+----------+-----------------------------------------------------------+
| De       | *The version number of the image processing software used |
| finition | to edit or transform the image data.*                     |
+----------+-----------------------------------------------------------+
| Type     | string                                                    |
+----------+-----------------------------------------------------------+
| Required | R                                                         |
+----------+-----------------------------------------------------------+
| Re       | Y                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | 5.5 (e.g., Adobe Photoshop, version 5.5)                  |
|          |                                                           |
| (        |                                                           |
| Example) |                                                           |
+----------+-----------------------------------------------------------+
| Usage    | For use with 5.1.4.1 **ProcessingSoftwareName**           |
| Notes    |                                                           |
+----------+-----------------------------------------------------------+
| Use      | Manager                                                   |
+----------+-----------------------------------------------------------+

### ProcessingActions

+----------+-----------------------------------------------------------+
| De       | *An ordinal listing of the image processing steps         |
| finition | performed by way of* **ProcessingSoftware (5.1.4).**      |
+----------+-----------------------------------------------------------+
| Type     | string                                                    |
+----------+-----------------------------------------------------------+
| Required | R                                                         |
+----------+-----------------------------------------------------------+
| Re       | Y                                                         |
| peatable |                                                           |
+----------+-----------------------------------------------------------+
| Values   | rotate 90 CW                                              |
|          |                                                           |
| (E       | transformation (new image generation)                     |
| xamples) |                                                           |
|          | ICC profile added                                         |
+----------+-----------------------------------------------------------+
| Notes    |                                                           |
+----------+-----------------------------------------------------------+
| Use      | Whenever possible script or action files should be        |
|          | supplied for this element.                                |
+----------+-----------------------------------------------------------+

## Previous Image Metadata

  ------------ -----------------------------------------------------------
  Definition   *Documentation of change history and preservation of
               essential technical metadata to simulate return to original
               image data.*

  Type         \[retains previous data types\]

  Required     MA (each time a new generation of the image is created)

  Repeatable   Y

  Values       TBD. See sample DTD for examples.

  Notes        The current information shall not be erased when adding new
               information to the image history.

  Use          Manager, User
  ------------ -----------------------------------------------------------

# References

Adobe Systems, Inc., *TIFF, Revision 6.0, Final --- June 3, 1992*.
http://partners.adobe.com/asn/developer/PDFS/TN/TIFF6.pdf

Bearman, David. "Report of NISO/CLIR/RLG Technical Metadata for Images
Workshop, April 18-19, 1999." http://www.niso.org/imagerpt.html

California Digital Library. Digital Image Collection Standards,
September 1, 1999. Available in Word and PDF:
http://www.ucop.edu/irc/cdl/tasw/Current/current.html

Cedars Project Team and UKOLN, "Metadata for Digital Preservation: The
Cedars Project Outline Specification, Draft for Public Consultation,"
March 2000, esp. "Section 1.1.3 Provenance Information." Available in
Postscript and PDF:

http://www.leeds.ac.uk/cedars/OutlineSpec.htm

Digital Imaging Group DIG35. DIG35 Specification: *Metadata for Digital
Images, Version 1.1, Working Draft*, April 16, 2001, Annexes A, B, and
D.

Fleischhauer, Carl. "Audio Visual Metadata," Library of Congress
internal document prepared for the Audio Visual Preservation Digital
Prototyping Project, National Audio-Visual Conservation Center
("Culpeper"), October 25, 1999,
http://lcweb.loc.gov/rr/mopic/avprot/avmeta.html

Harvard University Library, "Administrative Metadata for Digital Still
Images," Library Digital Initiative data dictionary, version 1.1, June
8, 2000,
http://preserve.harvard.edu/resources/digitization/ImageMetadata.pdf

Hurley, Bernard J., John Price-Wilkin, Merrilee Proffitt, and Howard
Besser. The Making of America II Testbed Project: A Digital Library
Service Model, December 1999. Washington, DC: Council on Library and
Information Resources, 1999. Available in HTML, PDF, and print:
http://www.clir.org/pubs/abstract/pub87abst.html

International DOI Federation. Briefing Paper: Developing the DOI
Namespace, 2001, http://www.doi.org/namespace/010123-DOI-NS-paper.pdf

Lynch, Clifford. "Canonicalization: A Fundamental Tool to Facilitate
Preservation and Management of Digital Information," *D-Lib Magazine*,
September 1999, http://www.dlib.org/dlib/september99/09lynch.html

Phillips, Margaret; Woodyard, Deborah; Bradley, Kevin; Webb, Colin.
"Preservation Metadata for Digital Collections," Exposure Draft.
National Library of Australia, October 15, 1999, esp. "Table 5.1 Image,"
http://www.nla.gov.au/preserve/pmeta.html

RLG Working Group on Preservation Issues of Metadata. Final Report, May,
1998. http://www.rlg.org/preserv/presmeta.html

\[TIFF/EP\] ANSI (PIMA), *ISO/DIS 12234-2, Photography --- Electronic
still picture imaging --- Removable memory --- Part 2: Image data format
--- TIFF/EP*, (Tag Image File Format / Electronic Photography),
WG18/Item 189.2, June 21, 2000.

W3C, NOTE-datetime, *Date and Time Formats*,
<http://www.w3.org/TR/NOTE-datetime>