HDTenEightyP/NetNews huggingface dataset:
From: spl@szechuan.uucp (Steve Lamont)
Newsgroups: comp.graphics.visualization
Subject: Re: Legal Visualization
Date: 2 Sep 1992 16:59:16 GMT
Organization: University of Calif., San Diego/Microscopy and Imaging Resource
NNTP-Posting-Host: szechuan.ucsd.edu

In article <1992Sep2.162054.8466@nas.nasa.gov> eugene@wilbur.nas.nasa.gov (Eugene N. Miya) writes:
>In article <1992Sep2.144943.6404@unocal.com> stgprao@st.unocal.COM
>(Richard Ottolini) writes:
>>Visuals were not allowed in the infamous King trial that started the 1992 LA
>>riot, but I don't know why.
>
>The Hint to this is: why are statues of justice are blindfolded?

So they can't see the lawyers?

>Different development: I have found through a friend and climbing partner,
>a most fantastic book.  It has some choice comments about imagery if a tad
>on the expensive side (better than Tufte or Cleveland).

Uh... what is this "fantastic book," Gene? :-)  Don't keep us in
suspense.

							spl
-- 
Steve Lamont, SciViGuy -- (619) 534-7968 -- spl@dim.ucsd.edu
UCSD Microscopy and Imaging Resource/UCSD Med School/La Jolla, CA 92093-0608
"O generation of the thoroughly smug/and thoroughly uncomfortable...
.. the fish swim in the lake/and do not even own clothing." - Ezra Pound
From: sunil@lsl.co.uk
Newsgroups: comp.graphics.visualization
Subject: looking for Vista
Date: 3 Sep 92 10:50:22 GMT
Organization: Laser-Scan Ltd., Cambridge

Does anyone know if there is a Vista-esque utility for X?

(for those who dont know Vista (By VR Labs) generates fairly realistic images
from Digital terrain models)

Alternatively pointers to demonstration versions of similar utilities would be 
appreciated.

Many thanks

Sunil

--
sunil@lsl.co.uk
cs89ssg@brunel.ac.uk
Newsgroups: comp.graphics.visualization
From: spencer@med.umich.edu (Spencer W. Thomas)
Subject: Re: Curvature of a Surface
Followup-To: comp.graphics.visualization
Organization: University of Michigan
Date: Thu, 27 Aug 1992 18:51:13 GMT

There is no single number that is the "curvature" of a curface.
Directional curvature is defined as the curvature along a particular
tangent direction, and is the curvature of the curve of intersection
between a plane perpendicular to the surface at the point.  The
minimum and maximum values of the directional curvature occur along
perpendicular directions and are called the principal curvatures.  The
Gaussian curvature is the product of the principal curvatures.  It is
positive for "sphere-like" points, negative at "saddle" points, and
zero for ruled surfaces.  The mean curvature is the average of the
principal curvatures.

To compute the curvature tensor (from which the others may be
derived),

Note: below, i,j,k are in the set {1,2} and denote the two parameters of
the surface u1 and u2.  I.e., S(u1,u2) = (x(u1,u2), y(u1,u2), z(u1,u2)).

Capital letters are vector valued, lowercase are scalar (except g, g',
L and C, which are matrices, while gij, etc. are elements of those
matrices.)

1. Compute basic tangent vectors Xi = dS/dui

2. Compute metric coefficients gij = Xi . Xj (dot product)

3. Compute inverse metric coefficients g'ij = matrix inverse of gij

4. Compute normal vector N = Xi * Xj (cross product)

5. Compute derivatives of basic tangent vectors Xij = (d^2)S/(duj dui)
	i.e., Xij = dXi/duj

6. Compute coefficients of the second fundamental form 
	Lij = Xij . N

7. Compute components of curvature tensor Cij = sum(k)(Lki g'kj)

The Gaussian curvature is the determinant of the matrix C.  The mean
curvature is 1/2 trace(C).  The principal curvatures (c1, c2) are the
eigenvalues of C, and the principal directions are the corresponding
eigenvectors. If X(1) is the first principal direction, corresponding
to the curvature c1, then the directional curvature in the direction Y
is c1 cos^2(theta) + c2 sin^2(theta), where theta is the angle between
Y and X(1).

Reference: Elements of Differential Geometry, Millman and Parker,
Prentice-Hall, 1977.

--
=Spencer W. Thomas 		HSITN, U of Michigan, Ann Arbor, MI 48109
spencer.thomas@med.umich.edu	313-747-2778
Newsgroups: comp.graphics.visualization
From: Peter.Gorny@arbi.informatik.uni-oldenburg.de (Peter Gorny)
Subject: Re: Changing controlling stereo real estate (possible?)
Organization: University of Oldenburg, Germany
Date: Sun, 30 Aug 1992 15:48:25 GMT

sw@mdavcr.mda.ca (Scott Wood) writes:

>In a previous posting (which, unfortunately, expired before I got around
>to replying to), Howard Stroyan wrote:

>> An alternate approach is to not half the effective frame resolution but to
>> instead half the effective video bandwidth.  That is, have left and right
>> framebuffer of full resolution (say 1280x1024) and display them in 
>> alternation (either interlaced or complete frames).  This would produce
>> an effective frame rate of 30 fps on a typical 60Hz display.  The 
>> benefit of this approach is that a high screen res and a 1:1 aspect ratio
>> are maintained.  The disadvantage is ... well it reminds me of an other
>> old movie "My Friend Flicker" :-).  I remember seening this setup on
>> mac in the 89' SIGGRAPH Textronics booth.  I did have stereo_in_a_window
>> but it strobed terribly.

>We did this in our stereo X Windows implementation. If done properly,
>the flicker is not very bad. We felt that there was no contest in
>deciding between slightly more flicker and regaining the full frame 
>resolution. Although, since we were able to get a patent on the
>technique, maybe we did it differently than it has been done before.

Today you can buy 120 Hz displays and split that to 60 Hz -- no
flicker!

Peter Gorny


.     ________________________________________________________
      Snail-Mail:    P.O.Box 2503 - D-2900 Oldenburg - Germany 
      Voice:            +49-441-798-2901 or -4521 (Fax: -2155)
      E-Mail:     Peter.Gorny@arbi.Informatik.Uni-Oldenburg.DE 
                                         040003@DOLUNI1.bitnet 
                                              gorny@uniol.uucp
      ________________________________________________________
From: samaa@athena.mit.edu
Newsgroups: comp.graphics.visualization
Subject: Satellite Images
Date: 3 Sep 92 02:35:45 GMT
Organization: Massachusetts Institute of Technology


 Hi,

 I know that this might not sound as a good group to post that, but I
don't kkow where to ask that action.
 Anyway, I am looking for an FTP site for Satellite, Space, and earth
images. I am very interested in satellite images.


				Thanks
From: fortuna@cs.man.ac.uk (Armando Fortuna)
Newsgroups: comp.graphics.visualization
Subject: Mathematica 2.0 for MS-Windows Help!
Date: 27 Aug 92 10:59:19 GMT
Organization: Dept Computer Science, University of Manchester, U.K.

Hi netters,
A friend of mine has Mathematica 2.0 for MS-Windows. He has been having 
a few problems, and asked me to post this message.

1) It seems that, when a graphic is plotted on the screen, memory is
used, and there seems to be no way to get it back. You have to leave
Mathematica (ie "close" it0, and start again... Is there anyway to
reclaim memory after it has been taken? "Clear" and "ClearAll" do not
work...

2) Sometimes, when Mathematica is told to solve an equation, it crashes.
If you tell it to

Solve[a*x^4+b*x^3+c*x^2+d*x+e==0,x]

you can say good-bye to windows... If crashes just after it beeps, as if saying
that it has evaluated the expression above. Windows freezes, and you have
to *reboot* the machine.

The manual says that the program should be able to "Solve" polynomial
equations up to degree 4, and a few of higher degrees. 

After Mathematica loads its Kernel, there are 4.3 Meg of free (virtual)
RAM.

Plot a few 3D graphics, and you'll soon find yourself with 1 Meg free RAM,
and below that, the program crashes taking the computer along...

We would appreciate any help, and I'll post the answers.

Thanks,
Armando
--
===========================================================================
Armando de Oliveira Fortuna                    E-mail: fortuna@cs.man.ac.uk
Dept. of Computer Science                      Tel.: +44 61 275-6132
University of Manchester                       Fax.: +44 61 275-6204
Oxford Road
Manchester M13 9PL                          "...It works better...
England                                             ...if you plug it in..."
============================================================================
All opinions expressed are mine only! If you think otherwise, think it over!
From: spl@szechuan.uucp (Steve Lamont)
Newsgroups: comp.graphics.visualization
Subject: Re: CT head data set Public Domain???
Date: 2 Sep 1992 16:56:53 GMT
Organization: University of Calif., San Diego/Microscopy and Imaging Resource
NNTP-Posting-Host: szechuan.ucsd.edu

In article <1992Sep2.150828.2231@crl.dec.com> hsu@crl.dec.com (William Hsu) writes:
>
>The CT head data set I was refering to is public domain. It is contained
>in the Chapel Hill Volume Rendering Test Dataset Vol. II
>                                                      --
>You need only give proper acknowledgement to the originators of the
>data set, which is suppled in the collection.

Just to clarify, volume II is also available at that same site --
omicron.cs.unc.edu (128.109.136.159).

							spl
-- 
Steve Lamont, SciViGuy -- (619) 534-7968 -- spl@dim.ucsd.edu
UCSD Microscopy and Imaging Resource/UCSD Med School/La Jolla, CA 92093-0608
"O generation of the thoroughly smug/and thoroughly uncomfortable...
.. the fish swim in the lake/and do not even own clothing." - Ezra Pound
Newsgroups: comp.graphics.visualization
From: tlynchhuw@cc.curtin.edu.au
Subject: WANTED: 2D Image display tools...
Organization: Curtin University of Technology
Date: Thu, 3 Sep 1992 00:13:09 GMT


SUMMARY: Searching for X-Windows image display programs/widgets

I'm searching for a public domain X-Windows based image display tool for
the visualization of 8 & 16 bit raster scalar data to use as part of a
3rd year computer science project. I don't expect to find anything that
meets all of the requirements (a draft version of which is attached to
the end of this posting), but I hope to be able either extend or use
parts of an existing program/widget for developing a program that does.

Could anyone who knows of any such programs (that are not listed below)
please email me a note with instructions on how to obtain a copy.

I have so far found the following programs but I have decided to
continue searching.

Complete programs :-

      saoimage     - iraf image display tool (X11)
      ximage       - NCSA image display tool (X11)

Widgets/libraries :-

      vimage0.9 - Widget set for raster image display

        Does anyone know when version 1.0 of vimage will be
        released? I haven't been able to contact the author.

Please reply via e-mail and I will post a summary.

Thanks in advance,
Huw Lynch
tlynchhuw@cc.curtin.edu.au
----------------------------------------------------------------------
Student of Computer Science
Curtin University of Technology
Western Australia

PS - Following is a brief summary of the requirements of the
     3rd year project.

      o Images must be displayed in a format suitable for professional
        presentation (ie, at conferences on colour photographics slide
        etc). This will involve :-

            - labeled locational grids (by lattitude/longitude
              or line and pixel depending on the type of image)
            - coastline overlays (for geographically regular
              images using a map such as the CIA world map)
            - legends
            - labels
            - contrast enhancement tools enhanced over multiple
              images using a technique such as histogram
              equalization.
            - pseudo-colour manipulation and display facilities
            - gamma correction
            - image flipping (horizontal/vertical)
            - image zooming (in/out)
            - panning
            - contouring

Newsgroups: comp.graphics.visualization
From: andyrose@netcom.com (San Francisco Fractal Factory)
Newsgroups: comp.graphics.visualization
Subject: Re: Workshop on Automated Design of Visualizations
Date: 1 Sep 92 18:45:05 GMT
Organization: Netcom - Online Communication Services  (408 241-9760 guest)


There is significant need for adaptive learning
{hierarchical grouping of pronouns}
to be incorporated into anything like this.  Something like the following dialog
would be nice.

user: Load prison data.
machine: There are several files which have contain prison data.
Please elaborate or use file browser tool.
u:geographic, population, nutrition
m: Two files found.  Northern California Inmate Population,
Amnesty International Report on Prison Nutrition
u: load both
m: file1: 523 records, field labels: Facility, Population (long term), 
Population (short term), file is linked to California Facilities
Locator (loaded).
   file2: 75 records, field labels: Country Name, Caloric Intake, 
linked to World Map.
u: cross reference.
m: No entry for California (USA state), USA caloric intake 2200 Kcal/day
u: Make map
m: World or California?
u: California.
{draws map of california with default prison icons scaled to total population}
u: Animate to videodisc from north to south pause at prisons fade 
name, long term population up and down hold at end.
{animation is recorded to videodisc}
u: PictureTel to Boxer
{dials Rep Boxers v-mail archives and dumps animation}
u:later...


-- 
Andrew Rose andyrose@netcom.com FAX 4155537756 When peace rules the planet
From: andyrose@netcom.com (San Francisco Fractal Factory)
Newsgroups: comp.graphics.visualization
Subject: Legal Visualization
Date: 1 Sep 92 19:17:53 GMT
Organization: Netcom - Online Communication Services  (408 241-9760 guest)

Legal viz is the ethically amorphous line of work I find myself in.
In our case, a concrete company is sueing a cement company (or vice
versa) regarding quality.  Apparently several thousand concrete
railroad ties developed cracks,etc.,etc.

So there exists a quarry in N. Mass which rests on a fault.  This
fault runs from N. Carolina (or somewhere) up north.  Glacial
activity provided the site with gravel which was hauled out of there
before the workers got to the bedrock.  The argument rests on
the microscopic structure of the quarried rock being unsuitable.

Whether there is a shred of truth in this scenario is beyond
me .  I've never seen the quarry or felt the rock, although
I have some overhead photos.  I know nothing of making
cement.  I don't know there is a fault there.  In fact, I
don't know if the cracks in the railroad ties are important
or dangerous.

I am contracted to create a 'tutorial' which I suppose a jury
or a judge will look at.  This 'tutorial' will last about
12 minutes and will combine 2D and 3D elements, video and
narrative to illustrate the scenario.  I got some cool 3D geographies
of the area and generated a hill from contours supplied
by the gravel company.  Using maps of quarry working faces
I constructed spaces where the quarry was and subtracted them
from the hillside (Wavefront Booleans are much more solid than 
previously experienced, hill grid size was 100 X 100).  I will
texture map the overhead photos onto the quarry and probably
a dimmed version of a topo map of the area onto the landscape.
There will be some camera motion but not much.  Labels fade
in and out.  

When I am through I will post a list of bugs in 3.0 which right now
is about 17 items.  Can't seem to get Wavefront support on the phone.

Crimson VGX is really a dreamboat and is almost acceptable
for large grids.  Wavefront Director has made the setup much much better.
This code handles all the environment variables and launches 
applications using widgets to set command line args.  Property Editor
is super_ I mean it.  If you ever had to pick colors for a Wavefront
job by typing in RGB triples you can relate.  RenLine is really
useful also.  It 'renders' 'lines' which were previously ignored
by Wavefront.

later...

-- 
Andrew Rose andyrose@netcom.com FAX 4155537756 When peace rules the planet 
Newsgroups: comp.graphics.visualization
From: hsu@crl.dec.com (William Hsu)
Newsgroups: comp.graphics.visualization
Subject: CT head data set Public Domain???
Date: 1 Sep 92 15:23:48 GMT
Organization: DEC Cambridge Research Lab

Hi, I have a data set that I'm using to test my volume renderer and I'd
like to use to when other people demonstrate the program (i.e. sales people)
The data set is quite common, but I don't know if it is truely public domain
or not. It's the CT head often used by Marc Levoy. The CT scans have flares at
the mouth from the X-rays reflecting off the fillings.  Here's more detail on the
data set itself.

Description:    CT study of a cadaver head.  113-256x256 slices.
Dimensions:     z-113  y-256  x-256
Order:          z-y-x
Format:         16-bit integers -- two consecutive bytes make up one binary 
                integer.
File size:      14,811,136 bytes
Data source:    Data taken on the General Electric CT Scanner and provided
                courtesy of North Carolina Memorial Hospital.

I could contact NC Memorial Hospital, but I'm afraid that noone will know
what I'm talking about. If anyone has information regarding its public use,
I would greatly appreciate you dropping me a line.

Thanks,
William
-- 
=============================================================================
William Hsu				Watch out for those 18-wheelers....
Digital Equipment Corporation
hsu@crl.dec.com
=============================================================================
From: af1x+@andrew.cmu.edu (Alan S. Ferrency)
Newsgroups: comp.graphics.visualization
Subject: siggraph?
Date: 28 Aug 92 08:03:03 GMT
Article-I.D.: andrew.8ebYsrm00WB5J0k74j
Organization: Sophomore, Math/Computer Science, Carnegie Mellon, Pittsburgh, PA

Hi.  I'd like information on siggraph.
When and where is the next conference?  (I guess '92 already happened, where
and when will '93 be?)
Where can I get information about membership, and stuff like that (forms, etc)?

Thank you very much.

-me
Newsgroups: comp.graphics.visualization,soc.culture.china
From: xlli@silver.ucs.indiana.edu (xiao-lin li)
Subject: Recommendation of 3D graphics package in SPARC needed.
Organization: Indiana University
Date: Thu, 27 Aug 1992 18:50:48 GMT


Dear netters,

I highly appreciate your recommendation for the following.

A 3D graphics package to be used in SUN SPARC stations to 
represent triangulated surface with lighting, shading. 
Capability for animation prefered. I want to have the
best quality and best price (free software is most welcome).

Thanks.

Xiao Li
From: andyrose@netcom.com (San Francisco Fractal Factory)
Newsgroups: comp.graphics.visualization
Subject: The demise of worksations...
Date: 3 Sep 92 19:39:17 GMT
Organization: Netcom - Online Communication Services  (408 241-9760 guest)

As prophetic as it may sound, John Smith (Datasmiths, SF, CA)
told me all platforms were dead now that the 486-p5 upgrade
path is available.

This is a purely market-wise assessment.  I think the thread on
PC based graphic accelerator cards points out the strong impetus for
low-end high-speed devices in the future.  When is the future though?

Let's see.  You can buy Indigo-on-a-card from SGI, for a 
whatever bus.  Maybe somebody can say whether this will fit
into an advanced PC type architecture.

Alias is marketing their modeler, previewer for IBM PCs at
much less cost than there workstation software.  TOPAS from
AT&T is also available, as well as Swivel3D and AutoCAD 13.

Wavefront will run model and preview on 486 platforms (rumor).

OpenGL for 486->p5 looks probable (?).

Where does Apple fit into this?  The computer for the rest
of us (rich folk).  Probably somewhere out in desktop land, who knows?


BTW I got a covox card for my 486 which is way cool (man).
You train a command three times and the card will generate
keystrokes upon hearing the command.  Not accurate for
one or two syllables but great for someting like:
"Fireup CorelDraw" to open up applications.
"DialNetComm" to log into my account. etc.

I figure with one of those cool head mounted mouse and
a breath-sensor for a button, with voice recognition you
could work-in-bed.  Damage may result if your monitor
falls on your bed in the event of an earthquake though.

MicroCrap update:  Microsoft C/C++ crashes Microsoft Windows
upon compilation with the following C++ code:
#include <stdio.h>
#include <string.h>
main(){
	cout <<"Hello, world!\n";
}

This is out-of-the box.  Bummer, huh.
later

-- 
Andrew Rose andyrose@netcom.com FAX 4155537756 When peace rules the planet 
Newsgroups: comp.graphics.visualization
From: timo.vendelin@vtt.fi (Timo Vendelin)
Subject: Re: adaptive pseudo color program (24bit to 8bit) ?
Keywords: pmbplus, pmb+, fbm, mogrify, ChromaTools, RGB
Organization: VTT/TIK
Date: Tue, 1 Sep 1992 04:52:09 GMT
Reply-To: timo.vendelin@vtt.fi (Timo Vendelin)


Hello,

I have received  responses to my question.
I have not check which one is nearest for what I need.

One think ...  I was not clear enough in my first question.

I am interested an ADAPTIVE pseudo color program.
so the 256 color should be the best for visualization.
I have received few answers, which did not notice this one.
any way thank you all.

Here is what I have get so far. If you know something more let me know.
I will summarize.

- Several people mention pmbplus package, which is in most archives.

- fbm tool was also mentioned few times

- ChromaTools (Videotex Systems Inc)

- mogrify from contrib/ImageMagick.tar.Z on export.lcs.mit.edu

- I reveid also an implementation of Wan's variance method, which is
an adaptation of the Heckbert color quantization algorithm


	Timo Vendelin
	email: timo.vendelin@vtt.fi
From: andyrose@netcom.com (San Francisco Fractal Factory)
Newsgroups: comp.graphics.visualization
Subject: Headhunters - harsh reality
Date: 1 Sep 92 23:39:09 GMT
Organization: Netcom - Online Communication Services  (408 241-9760 guest)

This is for those of you who haven't looked for a job
in the Bay Area in computer graphics.  There are a lot of you
and a lot more coming I'm sure so you should know that...

.  headhunters are valuable resources but haven't much time for
those of you without LOCAL experience.  This can be a shock if
you've worked for four or five years at something you figure your
good at, you enjoy, and you want to help others do.

.  a headhunter MAY say something to you like "If your not willing
to commute a hundred miles a day, work 60 to 80 hours a week,
and take orders, there are others who will."

.  if asked by headhunter "What do you really want to do?" don't
say "Eat, I guess."  The charming headhunter may say "I'm sure you
will eat." and show you the door. 

This happened to me and I'm doing fine so don't worry about those
two car garages stuffed with Acuras and chain link fence around the
tennis court and health insurance and paying for your kids college.
I'm sure you will eat.




-- 
Andrew Rose andyrose@netcom.com FAX 4155537756 When peace rules the planet 
Newsgroups: comp.graphics.visualization
From: eugene@wilbur.nas.nasa.gov (Eugene N. Miya)
Subject: Re: Legal Visualization
Organization: NAS, NASA Ames Research Center, Moffett Field, CA
Date: Wed, 2 Sep 92 16:20:54 GMT

In article <1992Sep2.144943.6404@unocal.com> stgprao@st.unocal.COM
(Richard Ottolini) writes:
>Visuals were not allowed in the infamous King trial that started the 1992 LA
>riot, but I don't know why.

The Hint to this is: why are statues of justice are blindfolded?

>It might be a problem if the defense could not afford to compete with the
>prosecution.

Or vice versa.  Certainly an interesting social development to watch.

Different development: I have found through a friend and climbing partner,
a most fantastic book.  It has some choice comments about imagery if a tad
on the expensive side (better than Tufte or Cleveland).

--eugene miya, NASA Ames Research Center, eugene@orville.nas.nasa.gov
  Resident Cynic, Rock of Ages Home for Retired Hackers
  {uunet,mailrus,other gateways}!ames!eugene
Second Favorite email message: Returned mail: Cannot send message for 3 days
A Ref: Mathematics and Plausible Reasoning, vol. 1, G. Polya
Newsgroups: comp.graphics.visualization