HDTenEightyP/NetNews huggingface dataset:
From: lilleyc@cs.man.ac.uk (Chris Lilley)
Newsgroups: comp.graphics
Subject: Re: Convert YUV data to RGB
Date: 24 Jul 92 18:25:09 GMT
Reply-To: lilleyc@cs.man.ac.uk (Chris Lilley)
Organization: Department of Computer Science, University of Manchester UK

In article <1992Jul22.032423.13011@cs.cornell.edu>
soam@freyja.cs.cornell.edu (Soam Acharya) writes: 

>I am looking for pointers in converting digital YUV data to standard RGB
>format.  Now, I believe there are multiple ways by which YUV data may be
>represented.  For example, the pbmplus toolkit has a program that converts
>Abekas YUV bytes into a portable pixmap but I am not sure whether this is 
>the same YUV format used by the Sun VideoPix board which uses the SAA9051
>Digital Decoder chip to convert composite video into 4:1:1 YUV data.  By
>4:1:1 format I mean for example 8-bit data where there are 8 bits of Y for
>every 2 bits of U and V.  

>So, my question is: does there exist a standard way of converting the YUV
>data ( once I have extracted the Y, U and V components ) to RGB regardless
>of the format in which the YUV information was actually represented?

As far as I know, YUV is standard. It is the basis of European PAL television
broadcast composite video signals. It is also used by US broadcast
composite signals, after converting UV to IQ.

While the decoding is the same, the meaning of the resulting RGB is
different. If the information came from the US, it should be colour
corrected for an NTSC monitor. If it is European, it will be set for EBU
monitors. Some US material is set for the SMPTE monitors - there is no way
of telling, though ;-)

in matrix form:

	R		1.0	0.0	1.1402	Y
	G	=	1.0	-0.3959	-0.5810	U
	B		1.0	2.0294	0.0	V

You invert the matrix to go the other way.

Those monitors are (in CIE 1931 x,y chromaticity space)

%%	xR	yR	xG	yG	xB	yB	xW	yW	YW
gamma
%%------------------------------------------------------------------------------------
%%	BREMA standard EBU phosphors (European colour television monitor,
D65)
	0.64	0.33	0.29	0.60	0.15	0.06	0.3127	0.3290
100.0	2.2
%%	NTSC standard phosphors for US television monitors (illuminant C)
	0.67	0.33	0.21	0.71	0.14	0.08	0.310	0.316
100.0	2.2
%%	SMPTE (Society of Motion Picture and Television Engineers)
recommended practice
        0.630   0.340  0.310    0.595   0.155   0.070   0.3127	0.3290
100.0 	2.2

sorry about the line width, there ;-)

Chris
Newsgroups: comp.graphics
From: sandall@ccu.umanitoba.ca (Dwayne Sandall)
Subject: texture maps (any ftp sites?)
	this is probably and FAQ, but here goes...
Organization: University of Manitoba, Winnipeg, Canada
Date: Fri, 31 Jul 1992 02:08:00 GMT

	Does anyone know of ftp sites from which I could download texture maps, 
preferably in Macintosh PICT or TIFF formats? JPEG would probably be good as well.
	Please Email, and I will post, if enough ask for the info.
	
	thanks for your time.
-- 
	Dwayne Sandall,
		Faculty of Architecture,
			University of Manitoba
				sandall@ccu.umanitoba.ca
Xref: sparky comp.graphics:8257 sci.image.processing:261 comp.ai.neural-nets:3009
From: montnaro@spyder.crd.ge.com (Skip Montanaro)
Newsgroups: comp.graphics,sci.image.processing,comp.ai.neural-nets
Subject: Re: ALGORITHM NEEDED:  Palette Selection
Date: 29 Jul 92 15:38:14 GMT
Reply-To: montanaro@crd.ge.com (Skip Montanaro)
Organization: GE Corporate Research & Development, Schenectady, NY

In article <Bs1wLE.82z@undergrad.math.waterloo.edu> icfaragh@cayley.waterloo.edu (Chad Faragher) writes:

   The problem:  How to find the best palette of size-n for a particular image
   stored (at arbitrary resolution) as above.

Check out Appendices E (Color Allocation in XV) and F (The Diversity
Algorithm) of the xv documentation. Consult archie for an xv archive site
near you.

--
Skip (montanaro@crd.ge.com)
From: berman@nlm.nih.gov (Lew Berman)
Newsgroups: comp.graphics
Subject: file formats
Date: 23 Jul 92 20:06:15 GMT
Reply-To: berman@nlm.nih.gov
Organization: National Library of Medicine

We have a set of xray images that we are going to process and currently
they do not have an associated header.  We are thinking of putting our
own unique header on to the file, but before doing that we would like to
know if there are any file formats that would server us better.  The images
will be displayed on a megascan monitor (mostly) and on sun workstations.
In addition they can be in a compressed format (JPEG using Autograph International
JPEG software) or uncompressed format.   Finally there will be five
different classes of xray images (cervical, lumbar, etc), that are different
sizes.

Any reccomendations?

Please respond to *ME* rather than the newsgroup and I will summarize if
neccessary.

Thanks,

Lew Berman
National Library of Medicine
From: stgprao@xing.unocal.com (Richard Ottolini)
Newsgroups: comp.graphics
Subject: The Best of SIGGRAPH 1992
Date: 30 Jul 92 18:23:26 GMT
Organization: Unocal Corporation
Originator: stgprao@xing


For those of us who couldn't make it to Chicago this week,
could you please post what you found new and interesting at SIGGRAPH?
Thanks.  See you in Anaheim in 1993.
Xref: sparky comp.graphics:8258 alt.graphics.pixutils:1835
From: ratinox@splinter.coe.northeastern.edu (Richard Pieri/Stainless Steel Rat)
Newsgroups: comp.graphics,alt.graphics.pixutils
Subject: Re: Latest Source of XV - Please Post
Date: 29 Jul 92 15:43:56 GMT
Followup-To: comp.graphics
Organization: 3WA, Boston Office. Or Nu Meta Chi. Take your pick.
In-reply-to: alexw@cyclops.intel.com's message of 27 Jul 92 04:54:22 GMT
X-Get-A-Clue: Have two, they're small.
X-Signature-Virus-Protection: Version 1.51
X-Posting-Software: GNUS 3.14.1 [ NNTP-based News Reader for GNU Emacs ]

>>>>> On 27 Jul 92 04:54:22 GMT, alexw@cyclops.intel.com (Alex Witkowski)
>>>>> said:

AW> Please post the source code for XV (I believe this also known as xview
AW> and xloadimage).  I do not have access to anonymous ftp as far as I can
AW> tell. 

1: Don't. XV 2.21 is big. I mean really big. If I were you I'd make sure I
didn't have ftp capabilities before making requests like this. You're on
Internet, so I don't see why you couldn't have ftp.

2: XView is NOT XV. XV is an image display utility, XView is a window
manager system.

3: xloadimage is similar in functionality to XV, but XV reads more formats,
allows all kinds of nifty colormap editing, scaling, and *saving* in a
number of formats. XV's quantization is also much better than xloadimage's.

--Rat

||||| | | | |  |  |  |   |   |    |    |    |   |   |  |  |  |  | | | | | |||||
                                                   __        ___ 
Richard Pieri, Northeastern's Stainless Steel Rat/   | /| / /   | The Worlds
Internet: ratinox@meceng.coe.northeastern.edu   /__  |/ |/ / /| | Welfare Works
    UUCP: ...!northeastern.edu!splinter!ratinox/   | /| / / / | | Association:
  BITNET: UA_RLP@NUHUB{.BITNET}               /__  |/ |/ / /  | | I will solve
  USNail: 14 Westdale RD  Holbrook, MA 02343 /   | /| / / /___| | any problem
 ICBMnet: 42 deg 1 min N, 71 deg 0 min W    /    |/ |/ /_//_____| for you.
From: jem@hpcupt3.cup.hp.com (Jim McCauley)
Date: Wed, 29 Jul 1992 19:05:08 GMT
Subject: 3 RGBs -> 1 PPM = only 91 colors!?!
Organization: Hewlett Packard, Cupertino
Newsgroups: comp.graphics

I tried to assemble red, blue, and green raster bitmaps of `lenna'
into a 24-bit portable pixmap, and I think that I goofed somewhere.

First, I converted the rasters to portable graymaps:

	rawtopgm 512 512 lenna.r.ras > lenna.r.pgm

	rawtopgm 512 512 lenna.g.ras > lenna.g.pgm

	rawtopgm 512 512 lenna.b.ras > lenna.b.pgm

This resulted in a fine set of three graymaps.  When viewed with `xv',
the graymaps indicate anywhere from 189 to 230 gray levels each.

I used the `rgb3toppm' program from the PBMPLUS toolkit to create what
I thought would be a 24-bit portable pixmap:

	rgb3toppm lenna.r.pgm lenna.g.pgm lenna.b.pgm > lenna.rgb.ppm

But when I view `lenna.rgb.ppm' with `xv', the Info window tells me
that there are only 91 colors in the image.  I don't see how that's
possible.  What gives?

Jim McCauley, Learning Products Engineer    **   I do not speak for   **
(that means that I write documentation)     ** Hewlett-Packard in any **
jem@cup.hp.com                              **   official capacity.   **
Newsgroups: comp.graphics,comp.windows.open-look,comp.windows.x,alt.toolkits.xview
From: pchan@mdd.comm.mot.com (Pat Chan)
Subject: Re: What's "xnews:Warning:input queue lock broken"?
Keywords: Openwindows, Sun
Organization: Motorola - Mobile Data Division; Richmond, BC
Date: Tue, 28 Jul 1992 20:57:32 GMT

>> "xnews: Warning: input queue lock broken".
>> 1 Has anyone had a similar experience?
>
>I consistently suffer the same problem using FrameMaker on a similar system.  
>It usually occurs when performing multiple clicks with the mouse.  
>The system can hang for a considerable length of time but does eventually come back.

I always have this problem when I used OpenWin2 panel list. 
After I've deleted several items, multiple clicks on other
list items give the about warning and the application hangs.

-- 
Pat Chan                          Internet: pchan@mdd.comm.mot.com 
Motorola Mobile Data Division     Voice: (604) 241-6032
11411 Number Five Road            Fax: (604) 241-6042
Richmond, BC Canada V7A 4Z3
Xref: sparky comp.graphics:8023 comp.groupware:616
From: mstephens.520@postman.gsfc.nasa.gov (mark stephens)
Newsgroups: comp.graphics,comp.groupware
Subject: Object graphics, PC & Mac, sharing... is there no hope?
Date: 22 Jul 92 14:17:39 GMT
Organization: nasa/gsfc

My shop is building a distributed database system whose front ends will
be Macs and PCs.  The application is a requirements management tool which
deals not only in paragraphs of requirements but in pictures (lots of 
boxes with lines going every which way).  The pure text part causes no
concern as it's just ascii and is both viewable and editable on both 
platforms.  Pictures are another story.  Here's the HW/SW setup:

Backend server:         Solbourne with 2 CPUs (SUN clone) running Oracle RDBMS
Front end application:  OMNIS 7.0 by Blyth Software

Omnis is a database all to itself, and communicates well to Oracle on both
platforms.  It has two types of fields for pictures.  One is native format and
the other is a shared format.  The native formate preserves the objects in
the picture.  If you paste in a Microsoft Draw picture, you can get it back
and still move boxes as boxex.  Same for the Mac.  You cannot view these
pictures on a non-native computer.  You can if you use the sharred format.  
Catch is Omnis converts it to a bit map.  No objects and no manipulation.
Boo, hiss.

Is there any application out there which can help here.  It just amaises me that 
this is STILL a problem between these two boxes.  Hopefully I'm just behind the 
times.  If such a converstion program could be found, we could store its binary 
format in Omnis (and a bit map so the picture can be viewed).  When the picture
needs to be copied into a drawing program, we use the binary format, convert it
into the native format and give the file to the drawing program.  Storage back
into the database is the reverse.

Any suggestion would be much appreciated.

mark stephens
NASA/GSFC code 522
Greenbelt, MD

301  286-5994
Newsgroups: comp.graphics,comp.os.ms-windows.apps
From: craigd@ruby.aruba.UUCP (Craig Dunham)
Subject: Re: Address of COREL wanted...
Date: Fri, 24 Jul 1992 13:45:27 GMT
Organization: Project Zed

> I'm looking for the address of COREL Systems in Ontario, Canada.
> If anybody out there knows, could you please drop me a line? (Also, fax
> numbers and email addresses would be very helpful.)


Corel Corporation
1600 Carling Ave.
Ottawa, Ontario
K1Z 8R7
Canada

Phone: (613) 728-8200
Fax:   (613) 728-9790


-- 
Craig Dunham                     |Internet Style: aruba!craigd@uu2.psi.com
                                 |UUCP     : ...!uunet!uu2.psi.com!aruba!craigd
Newsgroups: comp.graphics,comp.sys.mac.system,comp.sys.mac.apps,comp.sys.mac.programmer
From: Andrew.Brennan@bbs.oit.unc.edu (Andrew Brennan)
Subject: XCMDs for De-JPEG'ng under Mac 6.0.x
Keywords: XCMD graphics JPEG hypercard
Organization: Extended Bulletin Board Service
Date: Wed, 22 Jul 1992 15:36:55 GMT

      I'm trying to locate source code (.C if you have it) for 
   Mac decompression of JPEG images under Hypercard (or Supercard).
   Unfortunately, everything I've seen so far is IBM compiled pieces
   that haven't included the code.

      JPEG (not the proprietary ones) is standard, so I expect that
   the code will be easily ported ... but I've not seen the code at
   this point.

      'Course, if anyone HAS the XCMDs ...  :^)

      andrew.  (brennan@hal.hahnemann.edu)


--
   The opinions expressed are not necessarily those of the University of
     North Carolina at Chapel Hill, the Campus Office for Information
        Technology, or the Experimental Bulletin Board Service.
           internet:  bbs.oit.unc.edu or 152.2.22.80
From: kjb@cgl.citri.edu.au (Kendall Bennett)
Newsgroups: comp.graphics
Subject: HPGL reference material
Date: 21 Jul 92 04:23:42 GMT
Organization: RMIT Advanced Computer Graphics Centre, CITRI, Melbourne

I need to get hold of some programming information on the HPGL programming
language. Can anyone give me any pointer to publicly available material,
and where to get it? Source code is fine. I will probably be getting the
official HP Painjet programmers guide from HP soon, but does this contain
the infomation that I need?

+------------------------------------------+-------------------------------+
| Kendall Bennett,                         | Internet:                     |
| Advanced Computer Graphics Centre,       | kjb@godzilla.cgl.citri.edu.au |
| Royal Melbourne Institute of Technology, | rcskb@minyos.xx.rmit.oz.au    |
| Victoria, AUSTRALIA.                     |                               | 
+------------------------------------------+-------------------------------+
| CoSysop (Bossman), PC Connection Australia:               +61 3 688 0909 |
+--------------------------------------------------------------------------+
From: rsc@altair.csustan.edu (Steve Cunningham)
Newsgroups: comp.graphics
Subject: Re: Siggraph receptions
Summary: Party Party Party
Keywords: SIGGRAPH After Hours
Date: 21 Jul 92 17:59:22 GMT
Organization: California State University, Stanislaus

In <14h8r3INN7k5@cs.utexas.edu>, kelvin@cs.utexas.edu (Kelvin Thompson) asks:

> Where are the Courses and Papers/Panels receptions going to be
> at Siggraph this year?

Let's see -- the course reception will be at Navy Pier and the Papers/Panels
reception will be in the Hyatt.

> (Siggraph is a convention about computer graphics.)

And the sun is a medium star in the main sequence...

[virtual .sig goes here -- press twice to activate]
From: U37956@uicvm.uic.edu
Newsgroups: comp.graphics
Subject: Does Microsoft C support SuperVGA ?
Date: 28 Jul 92 18:17:41 GMT
Article-I.D.: uicvm.92210.131741U37956
Organization: University of Illinois at Chicago


   I am trying to draw graphics using Microsoft C 6.0  on SuperVGA
mode and Super VGA monitor. One of the statements I used is

     _setvideomode(X);

I looked upthe manual of MS C , I couldn't find any mode supporting
1024x768x256 SVGA mode. I set up a loop for X varying from 200 downto -20
and check the videoconfig, it still can not find any SVGA mode.
I am new to Microsoft C , could someone help me out please ?
Thanx.
( The size of my graphics is  about 600x600 and it needs 256 colors )
Xref: sparky comp.graphics:8292 sci.image.processing:286 comp.ai.neural-nets:3021
From: glenn@Software.Mitel.COM (Glenn Thrower)
Newsgroups: comp.graphics,sci.image.processing,comp.ai.neural-nets
Subject: Re: ALGORITHM NEEDED:  Palette Selection
Date: 30 Jul 92 17:40:35 GMT
Organization: Mitel. Kanata (Ontario). Canada.
X-Newsreader: Tin 1.1 PL4

montnaro@spyder.crd.ge.com (Skip Montanaro) writes:
: A couple folks have asked me about where to find xv. I guess there is more
: than one program called xv. The one I am referring to is John Bradley's
: neat image viewer. The latest version appears to be 2.21. I know it's on
: export.lcs.mit.edu in ~ftp/contrib. I suspect it's also on more accessible
: sites like ftp.uu.net that mirror from export.
: 
: --
: Skip (montanaro@crd.ge.com)

That is correct. I just recently got from ftp.uu.net. It can be located at

packages/X/contrib/xv-2.21.tar.Z-split/part01 to part08
packages/X/contrib/xv-2.21.tar.Z-split/README

--

******************************************************************************
         __________     __________     __________
        / ________/    /___  ____/    /___  ____/
       / /  _____         / /            / /       glenn@Software.Mitel.COM
      / /  /__  /        / /            / /       
     / /_____/ /        / /            / /         Kanata, Ontario, Canada
    /_________/        /_/            /_/      

******************************************************************************
Newsgroups: comp.graphics
From: siegle@ils.nwu.edu (Greg Siegle)
Subject: req: crossover minimization algorithm
Organization: The Institute for the Learning Sciences
Distribution: usa
Date: Thu, 30 Jul 1992 17:42:40 GMT

Hi there,
   I'm looking for an algorithm to create a "mostly untangled" layout
for arbitrary graphs. That is, given a list of vertices and
connections between vertices I'd like to plot the vertices and
connections on a plane minimizing edge crossings. Ideally if the
algorithm is applied to a planar graph, no two edges should cross.
   In a really ideal world, I'd like the algorithm to be an
"anytime" algorithm such that if I stop it at any time before it's
"done" it can give me what it has. The produced graph should become
progressively less tangled as time passes.
   I don't care so much if its really slow. 
   Does such a beast exist? If you have any information regarding its
whereabouts or eventual capture please mail me, as I don't read this
group regularly.
   Thanks very much for your help.
          Sincerely,
          Greg Siegle

Newsgroups: comp.graphics,comp.unix.aix
From: IMAGING.CLUB@OFFICE.WANG.COM ("Imaging Club")
Subject: Wang SEAVIEW open document imaging
Organization: Mail to News Gateway at Wang Labs
Date: 23 Jul 92 21:43:45 EST

If you'd like a copy of the Wang SEAVIEW open
document imaging news from the AIIM imaging
show in June, let me know.

Michael.Willett@OFFICE.Wang.com
Newsgroups: comp.graphics
From: dave@appi.iis.u-tokyo.ac.jp (David Wuertele)
Subject: psychographics?
Organization: Institute of Industrial Science, University of tokyo.
Distribution: comp
Date: Wed, 29 Jul 1992 05:44:19 GMT

Anybody here hear of the field "psychographics?"

(I already know what "psychophysics" is.)

-----
David Wuertele, Yasuda Lab, Electronic Engineering, Institute of Industrial Science,
University of Tokyo.				dave@windsor.iis.u-tokyo.ac.jp
From: vesper@2draw.enet.dec.com
Newsgroups: comp.graphics
Subject: Re: 24 bit display of 24 bit images in X on DECStation 5000/240
Keywords: 24 bit
Date: 23 Jul 92 13:18:09 GMT
Reply-To: vesper@2draw.enet.dec.com ()
Organization: Digital Equipment Corporation


In article <1992Jul22.214630.5024@noose.ecn.purdue.edu>, dmc@ecn.purdue.edu (David M Chelberg) writes:
|>What I am interested in is in
|>displaying 24 bit images on a DECStation 5000/240 running Ultrix 4.2A
|>with their full 24 bits.  I am aware of XV 2.21 and Xloadimage, but
|>they both appear to first convert to 8 bits.  I was wondering what
|>were the best/fastest public domain programs to display such images,
|>and sequences of such images in rapid succession.

Consider getting the Utah Raster Toolkit (URT).I don't know off-hand the
location from which you can FTP this, but the name Spencer Tracy of
the University of Utah is very closely associated with URT. It certainly
does 24-bit image display on a 24-bit system; even if the default visual
is only 8-bit. (If they pulled that code out, I will get very angry!)

Andy V
From: gm35@prism.gatech.EDU (Greg Montgomery)
Newsgroups: comp.graphics
Subject: 3d grid rotating around wrong point
Date: 22 Jul 92 18:55:34 GMT
Organization: Georgia Institute of Technology


I am in need of some help with some 3d graphics programming. I have a program that reads in a series of x,y points with elevations, and I'm trying to display them as a 3d grid. I'm using polygons (triangles) to display the grid. The grid comes out good, but I would like to rotate it and scale it. I can do this without matrices, but when I put in the matrix code, it does not rotate properly. I've put together a matrixthat transforms each point by -.5, scales it, rotates it on the x and y axis, and then tran

sforms it back by .5. The grid seems to be rotating fine except for one corner by the origin which seems to be staying pretty much in one place. It's like the grid is rotating on that corner. I am pretty sure the matrix multiplication and the matrix-vector multiplication is working fine. I have a feeling that it has something
to do with the transformations, but I'm not sure. I'm still in high school, and
haven't even had trig yet, so this matrix and trig stuff is new to me, but I'm
pretty sure most of the code is right. Does anybody have any ideas or code
examples they could give me? Let me know if more details are necessary.
Thanks!

Greg

-- 
Greg Montgomery
Georgia Institute of Technology, Atlanta Georgia, 30332
uucp:	  ...!{decvax,hplabs,ncar,purdue,rutgers}!gatech!prism!gm35
Internet: gm35@prism.gatech.edu
Newsgroups: comp.graphics
From: jk87377@cc.tut.fi (Juhana Kouhia)
Subject: Re: FAQ as requested
Organization: Tampere University of Technology
Date: Fri, 31 Jul 92 17:56:50 GMT


In article <sxqmjyc.jef@netcom.com> Jef Poskanzer <jef@netcom.com> writes:
>
>I am actively searching for someone to take it over.

I take the job.
Actually, I have allready made basis for my own FAQ.
May I take some chapters from your FAQ?
I thought to take image format chapter, but may it be better
that you include it to your pixutils FAQ (if not allready there)?

I have few new sections in my FAQ, for example pointers to other
usefull information sources -- your pixutils FAQ is mentioned there.

I have allready written to news.answers moderator and the thing is ok.
I'm sure siggraph.org would like to take my FAQ to their site.


I will omit the debate with permissions on posting the FAQ;
there was no Jef's copyrights; the FAQ belong to comp.graphics
newsgroup. One person is just choosen to post and update it
*frequently*. I tried to be friendly for requesters; I thought Jef
only refused to post it, not hold the valuable information.


Juhana Kouhia
Newsgroups: comp.graphics
From: tsmaster@media.mit.edu (David LeCompte)
Subject: Help: PICT/TIFF -> Quicktime
Organization: MIT Media Laboratory
Date: Wed, 22 Jul 1992 16:05:11 GMT

At work I'm doing some graphics work with MacRenderman, and I'd like
to take the cool graphics that I'm producing and generate a Quicktime
movie. Or really, any other kind of easily played animation file.

A friend said that he thought that something exists that will take a
series of PICTs named something like FOOxx where xx is the frame
number and generate a movie. Any pointers?

			Thanks in advance
			Dave LeCompte

-- 
---------------------
ObSig
From: sngattan@matt.ksu.ksu.edu (Sanjay N Gattani)
Newsgroups: comp.graphics
Subject: Laser pens?
Date: 23 Jul 1992 16:14:38 -0500
Organization: Kansas State University
Distribution: usa
NNTP-Posting-Host: matt.ksu.ksu.edu

Hi:

	I am looking for information regarding laser pens for presentation 
purposes.  Can someone tell me where I should look for this item?
My email address is 

			sngattan@matt.ksu.ksu.edu
		
sanjay
Xref: sparky comp.graphics:8192 news.answers:2272