HDTenEightyP/NetNews huggingface dataset:
From: jbm@eos.arc.nasa.gov (Jeffrey Mulligan)
Newsgroups: comp.graphics,comp.multimedia,comp.compression
Subject: Re: Looking for analytic image quality metric
Date: 9 Nov 92 22:15:47 GMT
Distribution: usa
Organization: NASA Ames Research Center

westover@sunpix.East.Sun.COM (Lee Westover - Sun NC Development Center) writes:


>Hello netters,

>We are doing some work with digital video compression/decompression and
>are looking for a way to measure image quality that is not subjective.
>We would like to find a reasonable way of comparing an original image
>with the decompressed compressed image.  MSE and MAE are bad metrics
>and we do not want to hassle with user studies.

>Does anybody know of a good image quality measure?

Different types of measures are needed depending on what question you want
to ask:  ie., a different computation is required to answer "are the
artifacts visible or invisible" as opposed to "of these two images,
both with visible artifacts, which is better."

A simple model to predict the visibility of artifacts is to take
the error image, filter it with a filter that mimics human contrast
sensitivity, and then either integrate over the image or look for
the max.  More sophisticated models incorporate masking effects,
oriented subbands, and other stuff.

> Know of any
>institutions working on finding a good analytic image quality measure?
>Know of any papers about this subject?

People that I know are working in this area:

Peter Baarten	(consultant, Netherlands)
Jeff Lubin	(Sarnoff Research Lab)
Scott Daly	(Kodak Research)

Places to look for papers are proceedings of the Society for Information
Display (SID), and recent SPIE conferences on "Human vision and electronic
imaging."


-- 

	Jeff Mulligan (jbm@vision.arc.nasa.gov)
	NASA/Ames Research Ctr., MS 262-2, Moffett Field CA, 94035-1000
	(415) 604-3745
From: spl@pitstop.ucsd.edu (Steve Lamont)
Newsgroups: comp.graphics
Subject: Re: SIGGRAPH Journal out?  Haven't received mine.
Date: 9 Nov 1992 23:34:36 GMT
Organization: University of Calif., San Diego/Microscopy and Imaging Resource
NNTP-Posting-Host: pitstop.ucsd.edu

In article <1992Nov09.212234.18401@sco.com> brianm@sco.com (Brian Moffet) writes:
>I have received the proceedings of the SIGGRAPH 92 "faire", but I haven't
>received the normal journal that supposed to come out.  

Which normal journal?  Do you mean Computer Graphics or Transactions
on Graphics?

							spl
-- 
Steve Lamont, SciViGuy -- (619) 534-7968 -- spl@szechuan.ucsd.edu
UCSD Microscopy and Imaging Resource/UCSD Med School/La Jolla, CA 92093-0608
"Far out, man"
            - President George Bush, heard in a stump speech on NPR
From: mcastle@mcs213d.cs.umr.edu (Michael R Castle)
Newsgroups: comp.graphics
Subject: Re: Animation using gif or jpeg files. Conversion to .gl or .fli?
Date: 7 Nov 92 03:07:18 GMT
Organization: University of Missouri - Rolla

In article <1992Nov6.132238.11560@bsu-ucs> 00rbspelman@leo.bsuvc.bsu.edu writes:
>	Quick question: Say you have a 640x480(?)  16-color picture you want to
>use for your run of .gif's.  You have say, 8 of these in a series.  Separately
>these files would take up around 1meg of disk space total, right?  Now, when
>you take the run of .gif's and merge them into a .fli animation,  will the
>.fli file(s?) take up MORE or LESS space?  

Probably depends on frame-to-frame coherency.  FLI only use run length encoding
which does not save all that much. But, they also only store the pixels that
change from one frame to another.  If you have an animation that is a pretty
solid (or just unchanging background), and the objects don't move far between
frames so you only have pixels changing at the edges of some objects, then
it's possible for the fli to be smaller.   

On the other hand, if you suddenly change scenes in the middle of the animation,
the fli spec calls for you to just copy the frame into the fli file without
even rle compression (I assume this is for speed reading the image off disk,
don't want to change speed in middle of animation to decode a rle frame, but
decoding the initial frame on start up is ok).

So, it depends.

Hmm... I just decided to break apart a fli file and convert to gifs.
The fli in question (slider1.fli) was 320x200, but only about 1/3 of the 
screen was used for the actuall animation.  The fli was 147092 bytes, but
the sum of the gifs was only 86166. Compressing the fli with arj made it
only 71900 bytes.  I must admit to being surpised by this.  Part of it may
be due to the fact that the animation also only has 32 colors, which the
gif standard may be able to pack better because of it more bit-oriented 
compression (lzw).

Hmm... don't have quick access to any 256 color fli's to test this theory
wish.

oh well...
mrc


ps:  with any luck, i will be able to re-write and distribute ppmtofli/flitoppm
over thanksgiving weekend.
From: bvh@cse.unl.edu (Obi-Wan)
Newsgroups: comp.graphics
Subject: Re: Graphic File Formats
Date: 11 Nov 1992 01:58:57 GMT
Organization: MicroImages, Inc.
Distribution: world
NNTP-Posting-Host: cse.unl.edu

In article <6311@sersun1.essex.ac.uk>, shepa@sersun1 (Shepherd A J) writes:
> Can anyone let me know where I could get hold of information on various
> graphic file formats? 
> 
> TIFF, GIF, BMP, MAC, PCX or whatever. Especially TIFF though.

The offical TIFF 6.0 docs (in Postscript form) can be had via anonymous
ftp from sgi.com in the /graphics/tiff directory.  There's also sample
pics there demonstrating the various TIFF options.  A word of warning:
the printed documentation is one or two hundred pages.

				-- Obi-Wan

-- 
 |\_/|  AACK! ||  Genius may have its   ||  "Obi-Wan" (Ben Hollingsworth)
\'o.0'/       ||  limitations, but      ||  MicroImages, Inc.  Lincoln, Nebraska
=(___)=       ||  stupidity is not thus ||  University of Nebraska - Lincoln
   U   PTHAT! ||  handicapped.          ||  email:  bvh@cse.unl.edu
From: sloan@cis.uab.edu (Kenneth Sloan)
Newsgroups: comp.graphics
Subject: Re: polyhedron/polyhedron intersection
Keywords: 3d graphics, intersection
Date: 11 Nov 92 04:12:37 GMT
Article-I.D.: cis.1992Nov11.041237.9669
Organization: CIS, University of Alabama at Birmingham

In article <1992Nov11.002123.27579@kpc.com> hollasch@kpc.com (Steve Hollasch) writes:
>katkere@engin.umich.edu writes:
>| I am looking for code/ideas for finding if two polyhedrons intersect.
>| I think that polygon/polygon intersection will be used as a building
>| block for this. Is there a better way to do this? Can the sgi
>| rendering engine be used in any way to do this? Where can I find
>| code for polygon/polygon intersection?
>
>    Polyhedron intersection has both trivial accept and trivial reject
>conditions.  Let P and Q be two polyhedra, and let Pc and Qc be some
>arbitrary "center" of the polyhedron.  Then let Prmin & Qrmin be the
>minimum distance from the center to any of the vertices of the polyhedra,
>and Prmax & Qrmax be the maximum distances from the polyhedra centers to any
>vertex on the corresponding polyhedra.
>
>    Trivial Reject:  |Pc - Qc| > (Prmax + Qrmax)
>
>    Trivial Accept:  |Pc - Qc| < (Prmin + Qrmin)
>
>    If neither of these tests succeed, then you must test each vertex of P
>to see if it lies within Q, and then you have to test each vertex of Q to
>determine if it lies within P.
>
>    This is not all that simple for non-simple polyhedra (e.g. a torus), but
>you may just be dealing with simple polyhedra anyway.

Even for simple polyhedra, is it not possible for two polyhedra to
intersect even though your Trivial Reject fails, your Trivial Accept
fails, and no vertex lies INSIDE the other polyhedron?  I believe that
you must also test all edges for intersection with all faces of the
other polyhedron or triangulate (tetrahedralize) and test all tetrahedra
in one polyhedron against all tetrahedra in the other..  Testing
vertices works for polygons - but polyhedra are tougher.


-- 
Kenneth Sloan                   Computer and Information Sciences
sloan@cis.uab.edu               University of Alabama at Birmingham
(205) 934-2213                  115A Campbell Hall, UAB Station 
(205) 934-5473 FAX              Birmingham, AL 35294-1170
Newsgroups: comp.graphics,comp.graphics.animation
From: g.coulter@daresbury.ac.uk (GC)
Subject: TGA to GIF on SUN/Unix 
Reply-To: g.coulter@daresbury.ac.uk
Organization: Daresbury Laboratory, UK
Date: Thu, 12 Nov 1992 09:27:12 GMT

Hi everyone.

I know this is an age old problem but I have looked around and can,t
seem to find what I want. I am using the POV raytracer on a SUN 
SPARCstation and wish to convert its output "data.dis" or "data.tga"
to a file format that I can display on the screen "GIF", "JPEG".

Someone told me that I could use a program called PBMPLUS but I cant
for the life of me find an FTP site where I can get it. Can anyone
out there let me know where I can get this program or something similar
that will also do the job.

Thanks Gary.




Newsgroups: comp.graphics
From: hysky@polaris.utu.fi (j.h.husgafvel)
Subject: Need True Type/Type 1 font specs!
Organization: University of Turku, Finland
Date: Wed, 11 Nov 92 18:56:31 GMT

First: sorry if this is a wrong group (someone suggested comp.fonts
but I don't get it).

If anyone knows where to get True Type and/or Type 1 font specifications
(for free preferably) please tell me!
Any info about converting them to some other format (sources, programs etc.)
would also be appreciated!

Thanks in advance,
/hysky  hysky@polaris.cc.utu.fi   (j.h.husgafvel)

Newsgroups: comp.graphics
From: tessmann@cs.ubc.ca (Markus Tessmann)
Newsgroups: comp.graphics
Subject: Re: MPEG (what haapened to the new drivers for dos?)
Date: 12 Nov 1992 10:41:43 -0800
Organization: Computer Science, University of B.C., Vancouver, B.C., Canada
NNTP-Posting-Host: larry.cs.ubc.ca

<GNR100@psuvm.psu.edu> writes:


>        Some time back, I saw a post stating that Xing Technologies
>is working on a new version of MPEGXING  for DOS that includes more drivers.
>I was just wondering if anyone knows how close that is to being released.
>Alos, if anybody wants to see the origiona artical, Email me + I will send it.
>                                               Gordon Rogers
>                                               gnr100@psuvm.psu.edu
>     Please respond via Email, as I do not often read this group.


I called them last Monday (Nov 9) and they said that they expect to release the
new version within a couple of weeks.

	Markus
Newsgroups: comp.graphics,comp.multimedia,comp.compression
From: jonathan@rahul.net (Jonathan Heiliger)
Subject: Re: Looking for analytic image quality metric
Organization: a2i network
Distribution: usa
Date: Tue, 10 Nov 1992 00:06:00 GMT

In article <1dmt1iINNgt7@news.aero.org> werner@aero.org (Michael F. Werner) 
writes:
>    Can anyone recommend a service in the Los Angeles area that could 
generate
>a high quality negative or transparency from an image file?  The final 
objective
>is to make prints from 8 by 10 inches up to poster size.

   There definately should be.  I don't know any off the top of my head 
though.  All you need is a Service Bureau with linos or an Agfa Selectset for 
higher resolution.  This will allow you to print 8x10" negs at either 3386dpi 
(on the lino) or 3600dpi on the SelectSet.



 
-- 
Jonathan Heiliger ........ Electric Power Research Institute
Internet: -/- jonathan@rahul.net -/- flix@mecca.epri.com -/-
Telephone <*> (415) 855-2888
Organization: Middle East Technical University - Computer Center
Date: Saturday, 7 Nov 1992 14:53:56 TUR
From: <E59392@TRMETU.BITNET>
Newsgroups: comp.graphics
Subject: WANTED: Simulation of physics experiments


      Hi, I'm looking forward simulation of physics experiments especially

  for high school students.

      If you can direct me where I can find them I'l be glad.


      THANKS IN ADVANCE.

Newsgroups: comp.graphics
From: brianm@sco.com (Brian Moffet)
Subject: SIGGRAPH Journal out?  Haven't received mine.
Organization: The Santa Cruz Operation, Inc.
Date: Mon, 09 Nov 1992 21:22:34 GMT

I have received the proceedings of the SIGGRAPH 92 "faire", but I haven't
received the normal journal that supposed to come out.  

I had heard that they were doing a review of recording options for 
computer graphics, which piqued my interest.

thanks

brian moffet
--
"Face it, Chuck.  Taken as an aggregate, the human race is a stupid, sorry lot."
                           -- Jonathan Quist

brianm@sco.com  or uunet!sco!brianm                    Speaking for Myself
Newsgroups: comp.graphics
From: fred@balzac.scd.ucar.edu (Fred Clare)
Subject: Re: Need True Type/Type 1 font specs!
Organization: NCAR/UCAR
Date: Wed, 11 Nov 1992 20:10:48 GMT

In article <1992Nov11.185631.28512@polaris.utu.fi>, hysky@polaris.utu.fi (j.h.husgafvel) writes:
> First: sorry if this is a wrong group (someone suggested comp.fonts
> but I don't get it).
> 
> If anyone knows where to get True Type and/or Type 1 font specifications
> (for free preferably) please tell me!
> Any info about converting them to some other format (sources, programs etc.)
> would also be appreciated!
> 
> Thanks in advance,
> /hysky  hysky@polaris.cc.utu.fi   (j.h.husgafvel)
> 

-- 
Adobe has a book

Adobe Type 1 Font Format
(c) 1990 Adobe Systems Incorporated
Part number LPS0064

Adobe's phone number: 415-961-4400

----------------------------------------------------------
Fred Clare * NCAR (Nat'l Center for Atmospheric Research)
PO Box 3000 * Boulder, CO  80307-3000 * 303-497-1284
fred@ncar.ucar.edu
Newsgroups: comp.graphics,comp.graphics.animation
From: kkt@philabs.philips.com (Kim-Kiat Tan)
Subject: Re: Info on these 3d animator software
Keywords: 3d software
Organization: Philips Laboratories, Briarcliff, New York
Date: Wed, 11 Nov 1992 21:13:14 GMT

In article <1992Nov11.025302.28624@midway.uchicago.edu> chrisw@fciad2.bsd.uchicago.edu (chris williams) writes:
>In article <1992Nov5.083408.7517@u.washington.edu> eylerken@u.washington.edu writes:
>>
>>   I would like some information about these products, what you like, featur,
>>bad, etc.
>>
>>     1.       3D studio ( now I see one by autodesk at ver 2.0, is this the sae
>>                          one that everyone tells me is so great? >
>>
>>     2.       Topas 4.0 by at&t I believe
>>
>>     3.       Digital Arts DGS 3.3
>>
>>and I would like to know if there is a student price for these programs.
>
>   If I were just starting out, and had no previous experience with any
>of these programs I would probably go with 3D Studio. It is the only one
>of these that is currently being developed at a reasonable pace. Topas
>is Crystal 3D with a more interactive face grafted on, and GSL (the
>former graphic software arm of AT&T) believes in tiny improvments at
>high prices. Digital Arts fired their tech support guy, and seems to
>want to dump the PC product in favor of a product for the Indigo.
>
>   Autodesk seems likely to be the most likely to offer a student price,
>as they offer one on AutoCad. 
>
	The last time I asked about the student price, it's about $1500.00.
Any student has the kind of money ?
Newsgroups: comp.graphics
From: powhwee@iti.gov.sg (Tan Pow Hwee)
Subject: Isoparametric Surface
Organization: Information Technology Institute, National Computer Board, Singapore.
Date: Fri, 6 Nov 1992 08:17:53 GMT

Hi,

    Does anyone has an algorithm/program to compute a tight bounds
for an isoparametric (those used in finite element analysis) patch
given the range of its two parameters?  In particular, a second
order quadrilateral patch.

    Thanks in advance for any help.

ph

Newsgroups: comp.graphics
From: ledwards@leland.Stanford.EDU (Laurence James Edwards)
Subject: Re: polyhedron/polyhedron intersection
Keywords: 3d graphics, intersection
Organization: DSG, Stanford University, CA 94305, USA
Date: Thu, 12 Nov 92 09:13:52 GMT

In article <1992Nov12.011952.1154@cis.uab.edu>, sloan@cis.uab.edu (Kenneth Sloan) writes:
|> [......]
|> 
|> Here's a nice simple question to keep everyone occupied (sit down Joe -
|> this one's not for you).  
|> 
|> GIVEN an arbitrary, simple polyhedron, P.
|> 
|> FIND the largest (greatest volume) convex polyhedron completely
|> contained in P.

Interesting question ... well it would seem that you'd have to split the
polyhedra with planes containing each concave edge. It would also seem that
to maximize the volume the splitting plane would have to contain a face.
So split the polyhedra up into convex pieces with two splitting planes
at each concave edge, then find the combination of convex pieces that
maximizes the volume and is convex. Not very efficient (and maybe not even
correct) but, as usual, this is just off the top of my head.

Larry Edwards
From: sdoran@kitty.ksu.ksu.edu (Steven Marcotte)
Newsgroups: comp.graphics
Subject: N bit planes/pixel or N bits/pixel?
Date: 9 Nov 1992 21:04:19 -0600
Organization: Kansas State University
Distribution: world
NNTP-Posting-Host: kitty.ksu.ksu.edu


  What is the advantage of N bitplanes/pixel over N bits/pixel?  I would
think that the N bin/pixel (packed-pixel) representation would offer
better speed than jumping through memory and performing bit twiddling,
especially at 8 bits/pixel.

Steven

--
Steven Marcotte


"Sometimes it is better to have twenty million instructions by
        Friday than twenty million instructions per second." -- Wes Clark
Newsgroups: comp.graphics,comp.os.os2.misc,comp.sys.ibm.pc.hardware
From: Brandon.Vanevery@launchpad.unc.edu (Brandon Vanevery)
Subject: 24-bit TMS34020 graphics cards w OS/2 2.0 drivers?
Organization: University of North Carolina Extended Bulletin Board Service
Distribution: usa
Date: Thu, 12 Nov 1992 23:17:59 GMT

Many thanks to those who responded to my earlier post!  I should have been
more specific about what I was looking for.  I need a "high-end" graphics
board for work in computer graphics.  I'd love to go with Silicoln Graphics,
etc., but I'm afraid it's not in the budget right now.  The board MUST have
the following minimal characteristics:

1) Texas Instruments TMS34020 processor
1) 24-bit color, minimum 1024 x 768 resolution.
2) EISA or MCA board.
3) OS/2 2.0 drivers.
4) Must be available and working _NOW_.
5) Budget is about $2000, can be increased if essential for performance.

If anyone has experience with such a _LIVE_ system, or with vendors of
TMS34020-based products in general, I'm all ears.

Please no feuds about the performance of EISA vs. MCA vs. LocalBus.  I
followed that thread for awhile, "did some homework" at the library, and
have made some binding decisions for my particular situation.

Thanks in advance,
brandon.vanevery@bbs.oit.unc.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:  laUNChpad.unc.edu or 152.2.22.80
Xref: sparky comp.graphics:11863 alt.cd-rom:4474 misc.forsale.computers:40210
From: posze@ecst.csuchico.edu (Paul J. Osze)
Newsgroups: comp.graphics,alt.cd-rom,misc.forsale.computers
Subject: Graphics CD-ROM Announcement
Date: 13 Nov 92 20:23:27 GMT
Organization: California State University, Chico
NNTP-Posting-Host: bummer.ecst.csuchico.edu


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The most recent versions of assorted  graphics programs, sources, 
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awe		hv12		pbmplus		TTDDD	
cellsim		image		phigs		urt
dcview		ImageMagick	polyblit	vesadrv	
dkb		imagetool	polyview	vgif
dvpeg		img		popi		vis
fbm		imobs		pov-Ray1	vogl
fractint	imtools		pv		vogle		
Gems I		irit		qrt		vopl
Gems II		jpegsrc		rad		vort	
Gems III	kali		radiance	webbobjects
geomutil	list.erichanes	radiosity	wframe	
geomview	mandelspawn	Rayshade	xpbm
gle		mineview	rend386		xpic
gnuplot		movietool	saoimage	xv
grafic		mtv		sipp		xview

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Newsgroups: comp.graphics
From: sloan@cis.uab.edu (Kenneth Sloan)
Subject: Re: SIGGRAPH Journal out?  Haven't received mine.
Organization: CIS, University of Alabama at Birmingham
Date: Tue, 10 Nov 1992 18:31:55 GMT

In article <1992Nov10.170212.20756@koko.csustan.edu> rsc@altair.csustan.edu (Steve Cunningham) writes:
>Once again (everybody join in on the chorus, folks...)
>
>	SIGGRAPH  <-->  Computer Graphics
>	ACM       <-->  Transactions on Graphics
>

Not to mention:


	conference proceedings  <-->  Computer Graphics
         + newsletter

	journal                 <-->  Transactions on Graphics

-- 
Kenneth Sloan                   Computer and Information Sciences
sloan@cis.uab.edu               University of Alabama at Birmingham
(205) 934-2213                  115A Campbell Hall, UAB Station 
(205) 934-5473 FAX              Birmingham, AL 35294-1170
From: j_wilson@csd.uwe.ac.uk (Hi how are you)
Newsgroups: comp.graphics
Subject: Info wanted on graphics hardware.
Date: 12 Nov 92 16:22:14 GMT
Organization: University of the West of England, Bristol

Sorry if this is not the correct group for this posting, but there isn't a 
comp.graphics.hardware or anything similar.
I have a Racal-Redac R500 graphics system. I am interested to know if anyone
has experience of using this system and if so what is it capable of ?
What sort of application was it used for ?
It is fairly old and contains the following boards : Matrox GXB1000 and 1 
Matrox RMB1000, etehernet controller, floopy/hard drive controller and
a microbar DBC68K single board CPU. 
I am particularly interested in any info on the Matrox boards, I have the
manuals, but if I can get some driver software etc. this would be usefull.
Thanks a lot in advance,
Jamie.
j_wilson@csd.uwe.ac.uk
Newsgroups: comp.graphics