Talk:Digital watermarking

message: What the heck is water marking and why do people do it? It is so confusing and most people do not know how to do it... and blah blah blah
This page in the form of a couple of days ago is totally inadequate. It lacked (1) a proper definition of the main topic of this page, (2) a generally accepted classification, and (3) a statement of the most relevant results (e.g. Costa). Moreover, its references were mostly obscure articles. A major re-edit is needed (started).  —Preceding unsigned comment added by Drkbts (talk • contribs) 05:30, 20 March 2008 (UTC)
replies: text: Thank you for your contribution.  A lot of content has been added.  It is highly mathematical in nature, as opposed to encyclopedic.     I did not see any references added, so the recent additions have the appearance of  original research.  Many of the additions are definitions, encyclopedic content should have some meaningful results.    In my opinion, a good addition would be a description of major embedding algorithms (spread spectrum, QIM, etc.), comments are performance of different schemes, etc.      Comfortably Paranoid (talk) 11:44, 1 July 2008 (UTC)
thread_title: So comment 

message: Watermarking is not a form of steganography. mahendra kumar dewangan
Watermarking has the objective to embed data in a document in a way, so that it:
* is hard to remove
* cannot be forged by someone else
In general it is not necessary that the watermark can not be detected. In contrary the goal of steganography is to hide data undetectable in a document.
When the watermark is hard to detect and the retrieval method is kept secret, then it qualifies as stegnanography. Embedding a watermark in copies of a movie so that the source of illegal copies can be determined is often stegnanographic. --76.247.183.128 (talk) 15:03, 25 February 2010 (UTC)
replies: text: It is also used for the purposes of Digital Rights Managment.  Uniquely identifiable data is put into a file to implement DRM. Wageslave 20:24, 4 June 2007 (UTC)
replies: text: Digital watermarking is a form of steganography, because it should be undetectable.  If it is detectable without keys, then it is removable by a malicious attacker, and is therefore useless cojoco (talk) 03:50, 1 December 2008 (UTC)
thread_title: Watermarking vs Steganography

message: —Preceding unsigned comment added by 210.212.140.70 (talk) 09:24, 3 March 2009 (UTC)
thread_title:  <nowiki>Headline text</nowiki><br /> 

message: Are images with digital watermarking generally not allowed on Wikipedia? Shawnc 02:10, 10 July 2006 (UTC)
replies: text: If you mean those visible notices, generally they're against Wikipedia style, though maybe they occur in some fair-use images where they mustn't be removed.  Phr (talk) 17:11, 11 July 2006 (UTC)

text: See commons:commons:exif#Watermark. Arlo James Barnes 22:36, 6 September 2018 (UTC)
thread_title:  Wikipedia 

message: All but the first paragraph of the history section seems either misplaced or completely irrelevant--128.154.44.44 13:32, 25 July 2006 (UTC)
thread_title:  Additions to history section 

message: According to Cox, Miller, Bloom in "Digital Watermarking" applications include broadcast monitoring, owner identification, proof of ownership, transaction tracking, content authentication, copy control and device control. The article only seems to focus on authentication. MatthewKarlsen 17:47, 18 September 2006 (UTC)
thread_title:  The coneption in the article seems somewhat narrow =

message: Alright, so.. this page suffers heavily from a number of issues, including direct quotation and single sourcing.
"A simple example of a digital
watermark would be a visible "seal" placed over an image
to identify the copyright. However the watermark might
contain additional information including the identity of the
purchaser of a particular copy of the material.
According to the human perception, the digital watermarks
can be divided into two different types as follows:
visible and invisible. Visible watermark is a secondary translucent overlaid
into the primary image as shown in the figure." is taken from , page 4. The spacing here (you may need to edit this page) is identical to what would happen if you copied it directly from the PDF.
"There are various spatial and frequency domain techniques used for adding watermarks to and removing them from signals. Purely spatial techniques are not robust to some attacks to the signal like cropping and zooming, whereas most frequency domain techniques and mixed-domain techniques are quite robust to such attacks." - This was stolen directly from , page 17. Kiranmayi Penumarthi is not quoted on this page.
"Another application is to protect digital media by fingerprinting each copy with the purchaser's information.  If the purchaser makes illegitimate copies, these will contain his name.  Fingerprints are an extension to watermarking principle and can be both visible and invisible." is from , page 7.
I'm going to ask around for some help in how to solve this problem, as I don't quite have the time or effort to put into this. — HelloAnnyong [ t · c ] 13:40, 1 November 2007 (UTC)
replies: text: Since they copyvios have been integrated into the text, it's nearly impossible to remove them so I've reduced it to what seems to be non-copyvio material.  If someone can find a good version in the history to revert back to, that would work also. John Reaves 22:17, 12 December 2007 (UTC)
replies: text: If the telltale signs of this copyvio are so hard to remove, perhaps we could argue that it is fair use to keep them in as the perfect example of digital watermarking!  Certes (talk) 00:50, 6 February 2008 (UTC)
thread_title:  Page issues 

message: "Cover object" is not defined.  —Preceding unsigned comment added by 172.190.109.41 (talk) 06:21, 26 November 2008 (UTC)
thread_title:  Undefined terms 

message: There doesn't appear to be any knowledge in this article that relates to the real world in any way.
Why is it not written in normal English?
Why no mention of Digimarc, the largest corporation selling watermark software?
Why no mention of any practical or genuine watermarking methods whatsoever?
Why no mention of unique issues associate with Audio, Still image and Video signals?
Why is everything written in Academic double-speak: for example, why does a scoring scheme have to exist on a unit interval [0,1], for goodness sakes?  How about a score between 0 and 1 instead?
Why no mention of practical perception issues, such as chromatic resolution, frequency perceptions, perceptual masking?
cojoco (talk) 03:45, 1 December 2008 (UTC)
replies: text: Why not contribute some improvements, instead of just whining?  You seem to know what should be here ... why not add it yourself?  —Preceding unsigned comment added by 152.17.56.5 (talk) 18:15, 15 June 2009 (UTC)
thread_title:  Why is there zero information about anything practical in this article? 

message: Someone has suggested merging this article into Watermark (data file).  I think that this is a bad idea, and have started a discussion on Talk: Watermark (data file). cojoco (talk) 21:29, 6 March 2009 (UTC)
thread_title:  Proposal to merge with [[Watermark (data file)]] 

message: Since when does a digital watermark have to be "difficult to remove"? Consider Amazon MP3's "watermarking" which is implemented as a digitally signed header:Record Company Required Metadata
The record company that supplies this song or album requires all companies that sell its downloadable music to include identifiers with the downloads.  Embedded in the metadata of each purchased MP3 from this record company are a random number Amazon assigns to your order, the Amazon store name, the purchase date and time, codes that identify the album and song (the UPC and ISRC), Amazon's digital signature, and an identifier that can be used to determine whether the audio has been modified.  In addition, Amazon inserts the first part of the email address associated with your Amazon.com account, so that you know these files are unique to you. Songs that include these identifiers are marked on their product detail page on Amazon.com.  These identifiers do not affect the playback experience in any way.
-- samj inout 13:15, 2 June 2011 (UTC)
replies: text: Not every embedded identifier is a watermark. For example, metadata, cookies, tags, checksums, and filenames are simply ways to convey information without any expectation of robustly surviving an attack. This differentiation should probably be clarified in the article. Is it a common misperception that "watermarks" and "tags" are synonymous?  — Preceding unsigned comment added by 24.18.238.89 (talk) 04:59, 24 March 2015 (UTC)
thread_title:  Difficult to remove? 

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message: Do the example images currently used in this article actually use digital watermarks, in the same sense as this article? The captions call attention to visible watermarks, which isn't what the article is talking about. If they actually are related to the article in some way, it's not very clear. Leangle30 (talk) 05:58, 24 June 2022 (UTC)
thread_title:  "Example" images