HDTenEightyP/NetNews huggingface dataset:
From: vorwald@oasys.dt.navy.mil (John Vorwald)
Newsgroups: comp.graphics
Subject: Generating Contours in Polar Coordinates
Date: 17 Apr 92 19:53:02 GMT
Reply-To: vorwald@oasys.dt.navy.mil (John Vorwald)
Organization: Carderock Division, NSWC, Bethesda, MD


Does anyone have a algorithm or routine to generate countour lines
for polar coordinates?  I have data in polar form,
z(i,j) = f(r(i),theta(j)), i=1,N, j=1,M, and I would like to
plot lines of constant z.
Please send email as I don't follow this board.

John Vorwald
vorwald@oasys.dt.navy.mil
Xref: sparky comp.graphics:5418 comp.graphics.visualization:774
From: Timothy.Allen@dartmouth.edu (Timothy Allen)
Newsgroups: comp.graphics,comp.graphics.visualization
Subject: Image Processing Software
Date: 14 Apr 92 20:54:38 GMT
Reply-To: tim.allen@dartmouth.edu
Organization: Dept. of Earth Sciences, Dartmouth College, Hanover, NH

I am interested in learning about what Image Processing software
packages people are using for the analysis of multi-band data sets,
such as Landsat Imagery.  What are the major software packages in use? 
What are the capabilities of each package -- e.g. rectification,
classification, PC and IHS transformations, filtering, contrast
enhancement, overlays?  Is the software specifically designed for
remote-sensing images, medical images, or more generally for any kind
of multi-band images?  What are the hardware requirements? Any special
requirements for display systems?

I am particularly interested in any software for Macintosh platforms,
but would like to hear about packages that people are using on PCs and
UNIX workstations as well.  I am familiar with Terra-Mar's "MicroImage"
software, and have heard of "ERDAS" but know nothing about it.  I am
also familiar with some single-band image processing software such as
the excellent public-domain "NIH Image" program for the Macintosh.

I'll be glad to post a summary of the responses I receive.

------------------------------------------------------------------------

Tim Allen                                       
tim.allen@dartmouth.edu
Earth Science Department
Dartmouth College, Hanover, NH 03755
From: mollers.pad@sni.de (Josef Moellers)
Newsgroups: comp.graphics
Subject: Re: 3D projection
Date: 10 Apr 92 13:18:08 GMT
Organization: Siemens Nixdorf Info.Sys. AG, Paderborn, Germany

In <ku53q5INNjvk@nunki.usc.edu> takkhoo@nunki.usc.edu (Tak Khoo) writes:

>Hi there!  Anyone out there know how to do 3D parallel/perspective
>projection?
>Thanx in advance for your help.

Simple, by reading the FAQ!

(Or by dividing through depth, i.e. z)
--
| Josef Moellers		| c/o Siemens Nixdorf Informationssysteme AG  |
|  USA: mollers.pad@sni-usa.com	| Abt. STO-XS 113	   | Riemekestrasse   |
| !USA: mollers.pad@sni.de	| Phone: (+49) 5251 835124 | D-4790 Paderborn |
From: hartung@crl.ucsd.edu (Jeff Hartung)
Newsgroups: comp.graphics
Subject: Re: colour dithering
Date: 12 Apr 92 17:06:08 GMT
Organization: University of California, San Diego

In article <1992Apr10.043615.15106@ccu1.aukuni.ac.nz> mmt@ccu1.aukuni.ac.nz (Mark Thomson) writes:
>I'm looking for an algorithm to dither an RGB colour image. I know how to 
>dither monochrome images, but am unable to find any info on colour dithering.
>Any help would be appreciated.
>
>
>Mark Thomson
>mm.thomson@aukuni.ac.nz

I did this once.  The principle is the same for when you are dithering
an image to greyscale or black and white, but somewhat elaborated.
Let's say you are using an error diffusion algorithm such as the
Floyd-Steinberg algorithm.  If you were dithering the color image to
greyscale, you'd convert each pixel's color to an intensity value (I =
.30R + .59G + .11B, if I recall correctly), then you'd find the grey
color in your palette that was the closest in intensity to the color
you are trying to draw, and distribute the "error" (i.e., difference
between what you used and what you wanted to place) both forward and
down according to the filter ratios.

Now let's say you want to take a 256 color image and dither it down to
the 16 colors suitable for an EGA.  First, you have to select the
appropriate 16 colors to use out of the 64 possible colors.  This is
generally the most difficult part of the process.  I usually sample the
pixels across the entire image and take the 16 most common colors, but
this is a real quick and dirty method and doesn't always work very
well.  (Comments from others on how to do this better?)

Anyhow, let's assume that you have your palette of 16 colors.  For each
pixel, as with the greyscale dithering, you first look for the closest
match in your palette.  To do this, you use the following formula:

	dist = sqrt( sqr(palette_R - image_R) +
		     sqr(palette_G - image_G) +
		     sqr(palette_B - image_B))

Having found the closest color in your palette, you measure the
difference between each RGB component drawn and those of the color you
tried to match, and distribute the error for the three components
forward and down according to the filter's ratios.

This can be a very time consuming process for a large image, and some
unwanted side effects often emerge (e.g., aliasing).  One good
antialiasing approach is to use serpentine raster processing so that
you process the odd raster lines from left to right, and the even
raster lines from right to left, always distributing error forward and
down in the direction you are currently processing.

Hope this get's you started,

-- 
 --Jeff Hartung--  	
 Disclaimer: My opinions only, etc., etc., BLAH! BLAH! BLAH!...
 InterNet - hartung@crl.ucsd.edu    	 BITNET - hartung@ucsd
 UUCP - ucsd!crl.ucsd.edu!hartung
Xref: sparky comp.graphics:5299 comp.sources.wanted:2478
From: Bobster@cup.portal.com (Robert Jules Shaughnessy)
Newsgroups: comp.graphics,comp.sources.wanted
Subject: Fast 3D Graphics C Code wanted. (please)
Date: 9 Apr 92 19:41:55 GMT
Organization: The Portal System (TM)


  5



           I am looking for some 3D graphics routines. I would like a

     routine that uses integer routines for speed, has 2d and 3d clipping,

     and uses filled surfaces. If anyone has something like this, even a

     floating point version I can convert, I would be very interested in

     looking at it.

     

     

     I will be using it on a 486-33 using turbo c++ 2.0 and a SVGA monitor.

     

     

     

     

     Thanks in advance!!!
From: dehaan@cs.vu.nl (G de Haan)
Newsgroups: comp.cog-eng
Subject: SPECIAL ISSUE JVLC ON COGNITIVE ASPECTS IN VISUAL LANGUAGES
Date: 9 Apr 92 10:43:34 GMT


 
         JOURNAL OF VISUAL LANGUAGES AND COMPUTING
 
                   CALL FOR PAPERS
 
   SPECIAL ISSUE ON COGNITIVE ASPECTS IN VISUAL LANGUAGES
 
Deadline for paper submission: August 1, 1992
Acceptance notification: October 1, 1992
Final manuscript due: December 1, 1992
Publication: March 1, 1993
 
Visual Languages and Visual Interfaces are becoming increasingly
popular. While the software aspects of Visual Languages and Interfaces
are already well understood little is known about the "usefulness"
of the proposed languages and interfaces. With "usefulness", mainly
the usability of the languages, their acceptance by users, and their
appropriateness for users' tasks is meant. 
 
There is a considerable body of knowledge related to such issues in
Human-Computer Interaction research. However, the key approaches
and findings of HCI do not go beyond the notion of direct manipulation.
Only few work stresses on the notion of Visual Interaction.
 
The "Journal of Visual Languages and Computing" is looking for papers 
presenting new concepts, approaches and theories which help to understand
the phenomenon of visual interaction and the design of visual
languages and interfaces in terms of human cognition.
 
Examples for relevant problem domains are:
 
        - is visual interaction always preferable ?
        - human knowledge presentation and application: 
                visual, propositional, ...
        - mental representation of visual languages and interfaces
        - which task in which representation ?
        - design principles for visual interaction
        - paradigms of visual languages / interfaces / interaction
        - evaluation of different visual paradigms
        - empirical studies of visual interaction
        - graphical methods for knowledge elicitation
        - semantics of visual languages
        - 3D-languages and virtual realities
        - visual representations as vehicle for 
                knowledge transfer / problem solving
        - ........
 
All interested persons can submit five copies of a paper no longer than 
20 pages by August 1, 1992 to
 
        Michael J. Tauber
        JVLC Associate Editor
        Department of Mathematics and Computer Science
        University of Paderborn
        Warburgerstr. 100
        D-4790 Paderborn, Germany
        Tel: +49 5251 60 2637
        Fax: +49 5251 60 3836
        E-mail: tauber@uni-paderborn.de
Xref: sparky comp.cog-eng:193 comp.human-factors:1129
From: rapaport@acsu.buffalo.edu (William J. Rapaport)
Newsgroups: comp.cog-eng
Subject: Computer Science position at SUNY Buffalo
Date: 6 Apr 92 16:50:03 GMT
Organization: State University of New York at Buffalo/Comp Sci


             STATE UNIVERSITY OF NEW YORK AT BUFFALO

                 Department of Computer Science
                   Temporary Faculty Position

We anticipate an opening for a one-year visiting faculty position
for  the  coming  year at a competitive salary for a new Ph.D. or
for a more senior person who wants  to  supplement  a  sabbatical
salary.  The successful candidate will teach one course or gradu-
ate seminar each semester. I would welcome you bringing  this  to
the  attention  of your finishing doctoral students or colleagues
who might be interested.  Please ask anyone interested to  submit
a curriculum vitae, and to arrange to have four letters of refer-
ence  sent  directly  from  their  referees,  to  me  by   e-mail
(selman@cs.buffalo.edu) or by mail to

                  Alan L. Selman
                  Department of Computer Science
                  226 Bell Hall
                  State University of New York at Buffalo
                  Buffalo, NY 14260

The Department currently  has  15  tenure-track  faculty, 12  ad-
ditional    faculty,   and   125   graduate   students.   Primary
research  areas  include:  artificial  intelligence,   complexity
theory,   computer vision, numerical linear algebra, parallel al-
gorithms, programming languages,  systems  and  VLSI.  Department
members   are   actively  engaged  in  interdisciplinary research
programs in the Advanced Scientific  Computing   Graduate  Group,
the  Cognitive Science Center, the Vision Graduate Group, and the
NSF National Center for  Geographic  Information  and   Analysis.
Departmental  computing  facilities include a network of worksta-
tions, hypercubes, Symbolics, an Encore   Multimax   and  several
image processing/graphics systems.
Newsgroups: comp.cog-eng
From: kfieldin@gollum (Kenneth H. Fielding)
Subject: wanted: Computer Vision by Ballard and Brown
Date: Wed, 08 Apr 92 13:57:34 GMT
Organization: Air Force Institute of Technology


I am looking for a used copy of
Computer Vision by Ballard and Brown

If you have a copy to sell please
contact me at

kfieldin@galaxy.afit.af.mil
or
kfieldin@frodo.afit.af.mil
Newsgroups: comp.cog-eng
From: Peter.Gorny@arbi.informatik.uni-oldenburg.de (Peter Gorny)
Subject: Re: Task Analysis Summary
Organization: University of Oldenburg, Germany
Date: Thu, 9 Apr 1992 23:02:16 GMT

mayoka@csgrad.cs.vt.edu (Kevin A. Mayo) writes:

>Honestly, I did not get a big response to my primary mail message.  But, I have
>included cuttings from email that I did receive. I appreciate all who responded,
Here is another hint, which might give you headache, because it is in
German:
Walter Volpert has developed a method called Kontrastive Aufgabenanalyse
(KABA). Approx. engl: Contrasting task analysis. 
The method centers on disturbance/intervention into the task-solving
process by outer influences.

He and his assistant Heiner Dunkel have applied it in the evalu-
ation of banking and insurance office communication.
You can find a short report 
Martina Zoelch and Heiner Dunkel: Erste Ergebnisse des Einsatzes der
"Kontrastive Analyse". In: Software-Ergonomie '91 (Ed.: D.Ackermann
and E.Ulich), Proc of th joint conference of the German Chapter of
the ACM, the Gesellschaft fuer Informatik (GI) and the Schweizer Informa-
tiker Gesellschaft (SI), Zuerich 18.-20.March 1991. Teubner Verlag
Stuttgart 1991. German Chapter of the ACM Berichte no.33. 
ISBN 3-519-02674-0 and ISSN 0724 9764.


I might add that in the same volume you find two other articles on
task analysis - one on "intellectual tools .." (in German) and
one on a case sudy with extended GOMS techniques (in English).

Peter Gorny





+--------------------------  Prof. Dr. Peter Gorny  --------------------------+
| Informatics Department    -   Computer Graphics & Software-Ergonomics Group |
| Carl von Ossietzky Universitaet Oldenburg  -  POB 2503  -  D-2900 Oldenburg |
|-----------------------------------------------------------------------------|
| * Internet *                                   * Telephone *                |
| Peter.Gorny@arbi.Informatik.Uni-Oldenburg.DE   Office:        +441-798-2901 |
| * Bitnet *                                     Secretariat:   +441-798-4521 |
| 040003@doluni1.bitnet                          Fax:           +441-798-2155 |
+-----------------------------------------------------------------------------+
From: smm@HQ.Ileaf.COM (Sheila Marinucci)
Newsgroups: comp.research.japan
Subject: Wanted - Info about Tokyo-based Search Firms
Keywords: Employment Agency, Executive Search
Date: 7 Apr 92 16:18:47 GMT
Article-I.D.: HQ.1992Apr7.161847.986
Reply-To: smm@HQ.Ileaf.COM (Sheila Marinucci)
Organization: Interleaf, Inc.


I have posted this question a few times to various
categories and have not heard from anyone ....

I am bothering you to find out if you can recommend
any Japanese executive search/employment agencies (or warn me about any)
based in Tokyo (reputable, senior management search 
experience, hi-tech search). Any information will be
very appreciated..

I hope to set up some meetings with some firms next week (4/13/92).

Please send responses to me (smm@ileaf.com) - all comments/suggestions/
recommendations will be kept confidential.

Thank you in advance,

Sheila Marinucci
smm@ileaf.com
-- 
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  Sheila M. Marinucci                                    smm@ileaf.com		
  Interleaf       Prospect Place, 9 Hillside Avenue, Waltham, MA 02154
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Newsgroups: comp.dsp
From: johnf@oakhill.sps.mot.com (John Fisher)
Subject: Re: How to get to Dr. Bub ?
Keywords: DSP, Dr BuB, Motorola, DSP56000, DSP56001
Reply-To: johnf@otis.UUCP (John Fisher)
Organization: Motorola Inc., Austin, Texas
Date: Fri, 17 Apr 1992 14:51:28 GMT

In article <1992Apr16.233936.8999@merlin.dev.cdx.mot.com> sepehr@falstaff.dev.cdx.mot.com (Sepehr Mehranbanzad) writes:
>In article <sjb3vINN32d@agate.berkeley.edu> izumi@pinoko.berkeley.edu writes:
>>In article <1992Apr15.101754.27694@cs.tu-berlin.de> leon@opal.cs.tu-berlin.de (Leon Schmidt (  
>>Barmixer )) writes:
>>> Please help me, I need application notes for a digital mixing
>>> panel. A friend of mine told me to watch out for Dr. Bub and
>

Although there is a lot of information about Motorola DSP processors on the
bulletin board, there are no complete application notes posted there.  However,
there is a listing of all the available DSP app notes; they are available at
no charge from Motorola DSP Marketing.  An easy way to order what you need is
to log into the BBS, find the titles you want, then leave a message to the
sysop to mail them to you.

>
>A user can dial up Dr. BuB by dialing (512) 440-3771 using a Bell 212A
>modem or (512) 440-3772 using a V.22 modem (it is possible that they have
>higher speed modems now, It has been while since I 've called them last).
>Be sure you set the character format to 7 data, even parity, and 1 stop bit.
>
>Sepehr Mehrabanzad

There have been some changes since this information was published.  Here is
the new information:

   Dial (512) 891-3771
   Supported baud rates are 9600, 4800, 2400, 1200, and 300.
   Use 8 data, no parity, 1 stop bit.
   You can log in as "guest" to look around, but you will have limited
      privileges.  Log in as "new" to open a new account with full
      access to all the data and capabilities of the BBS.

   (If there is excessive noise on the 3771 line, try 3773; 9600 baud
    service is not available on this line, however.)

I have a list of FTP sites that have Dr. BuB files.  Send me e-mail and
I will send you the list.
-- 
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
John C. Fisher                                                 (512) 891-2305
Motorola DSP Operation                                    FAX  (512) 891-3877
Newsgroups: comp.dsp
Subject: Speech synthesis products
From: mmt@ccu1.aukuni.ac.nz (Mark Thomson)
Date: Mon, 13 Apr 1992 02:20:59 GMT
Organization: University of Auckland, New Zealand.

Hi, I'm interested in finding out about speech synthesis devices. We were
planning a project based on the Philips PCF8200 formant synthesis chip, but
understand that this is now being withdrawn from the market. If anyone can
provide me with any info about similar devices, I would be most grateful.


Mark Thomson
mm.thomson@aukuni.ac.nz
From: kls30@duts.ccc.amdahl.com (Kent L Shephard)
Newsgroups: comp.dsp
Subject: Re: algorithms for special effects on sound
Keywords: Sound effects, sound processing.
Date: 10 Apr 92 18:40:13 GMT
Reply-To: kls30@DUTS.ccc.amdahl.com
Organization: Amdahl Corporation, Sunnyvale CA

In article <1992Apr8.184515.23296@vlsi.polymtl.ca> rouet@vlsi.polymtl.ca (Marc Andre Rouet) writes:
>
>I am looking for algorithms of popular musical instruments' sound effects
>(distorsion, chorus, fazer, flanger, bender, reverb ...)
>
>Can someone suggest me references on that topic ?
>
>Please mail a copy to my mailbox (rouet@info.polymtl.ca)
>
>thanks!
>
>Marc-Andre Rouet

Please post.
--
/*  -The opinions expressed are my own, not my employers.    */
/*      For I can only express my own opinions.              */
/*                                                           */
/*   Kent L. Shephard  : email - kls30@DUTS.ccc.amdahl.com   */
From: jbuck@forney.berkeley.edu (Joe Buck)
Newsgroups: comp.dsp
Subject: Re: Ptolemy software
Date: 16 Apr 92 19:22:21 GMT
Article-I.D.: agate.skk5dINN719
Organization: University of California, Berkeley
NNTP-Posting-Host: forney.berkeley.edu

In article <1992Apr16.233208.16723@grace.dsir.govt.nz> srgxnbs@grace.dsir.govt.nz writes:
>Whats the hardware requirements? or is it a case of "if you have to ask you
>can't possibly have it"?

Ptolemy release 0.3.1 runs on a Sparc, a Sun-3, or a DecStation.  It
builds successfully on the Sparc or the Sun-3 with g++1.40.3 (for which a
precompiled binary is included in the distribution), or a DecStation with
the OSF port of g++ (also included).  It also builds on Sun-4's with Sun
C++ version 2.1 (Sun's port of cfront version 2.1).

Sources and binaries for each of these three platforms can be FTP'd once
you sign the agreement.


--
Joe Buck	jbuck@ohm.berkeley.edu
Newsgroups: comp.dsp
From: leon@opal.cs.tu-berlin.de (Leon Schmidt ( Barmixer ))
Subject: How to get to Dr. Bub ?
Summary: Thanks for your help !
Keywords: How can I get to Dr. Bub
Organization: Techn. University of Berlin, Germany
Date: Wed, 15 Apr 1992 10:17:54 GMT

Please help me, I need application notes for a digital mixing
panel. A friend of mine told me to watch out for Dr. Bub and
he told me to search at "ivucsb.sba.ca.us", but this server
seems not to exist.
So please send me information, which e-mail Dr.Bub has or at
wich ftp-anonymous accounts I may get such application notes.

Many thanks from leon@opal.cs.tu-berlin.de !
Newsgroups: comp.dsp
From: fhoare@eleceng.uct.ac.za
Subject: IP numbers for Universities involved in Medical Image Processing
Summary: Internet numbers for Med Image Proc. Institutions
Keywords: Medical Image processing
Organization: University of Cape Town
Date: Mon, 13 Apr 92 13:19:57 GMT

We are interested in communicating with the following centres:

1. Health sciences center, University of Arizona
2. H Lee Moffitt Cancer Center and Research Institute, University of South 
Florida
3. UCLA school of medicine
4. Kurt Rossman Laboratories for radiological image research, University of 
Chicago.
5. Health Science Center, University of Texas, San Antonio
6. Georgetown University Hospital
7. Siemens Medical Systems, inc; Siemens Corporate Research, inc
8. University of Washington

We would appreciate the internet numbers of any, or all of the above, and 
of any other institutions working in medical image processing.
From: shimizu@unix.SRI.COM (Dan Shimizu)
Newsgroups: comp.dsp
Subject: Re: algorithms for special effects on sound
Keywords: Sound effects, sound processing.
Date: 13 Apr 92 22:31:15 GMT
Organization: SRI International, Menlo Park, California

A good intro that I found is:

	Bloom, P. J., "High Quality Audio in the Entertainment
	Industry", IEEE ASSP Magazine, vol. 2, num. 4, pp. 2-25, 
	October 1985, 
	
It's probably a little dated, but it goes over the basics of digital
audio, including sampling, aliasing, and reverb effects. If you
get any more references, please post them!

An OK text book is:

	Pohlman, Ken C., "Advanced Digital Audio", Carmel, Indiana: SAMS,
	1991, ISBN 0-672-22768-1

DAN
-- 
Dan Shimizu          | SRI International, 333 Ravenswood, Menlo Park, CA 94025
shimizu@unix.sri.com | (W) (415) 859-4391 
From: jsm@hpfcso.FC.HP.COM (John Marvin)
Date: Mon, 6 Apr 1992 07:07:44 GMT
Subject: Re: Article on Audio Restoration Process
Organization: Hewlett-Packard, Fort Collins, CO, USA
Newsgroups: comp.dsp

> >If anybody knows the name of the company or has old issues of BE they
> >could look through, please drop me a line.
> 
> 	Perhaps you were refering to Sonic Solutions' NoNoise?
> Their address:
> 
> 	Sonic Solutions
> 	1891 East Fransicso Boulevard
> 	San Rafael, CA

Another possibility is CEDAR Audio Ltd in Cambridge, England. There is a
very interesting article about their process in the March 1992 Audio Magazine.
Also, FYI, this article mentioned that there was an article about Sonic
Solutions' NoNoise process in the March 1989 issue (of Audio).

	John Marvin
	jsm@fc.hp.com
From: thssrkr@iitmax.iit.edu (Raghunath K Rao)
Newsgroups: comp.dsp
Subject: GRADUATE ASSISTANTSHIP. COMPUTER VISION/IMAGE PROC.
Date: 13 Apr 92 18:38:59 GMT
Organization: Illinois Institute of Technology


There is a graduate assistantship available for M.S/Ph.D candidates
for the Fall'92 semester in the Computer Vision and Neural Networks 
Lab, ECE Dept., Illinois Institute of Technology, Chicago. 

Current Research: 
1. Signal Representation using Wavelets
2. Pattern and Object Recognition
3. Image Compression
4. Probabilistic Models of Vision
5. Neural Networks for Image Representation and Recognition 

We are seeking only candidates with excellent qualifications.  
Interested candidates, please reply via EMAIL and send an ASCII resume 
to me at the following address : 

    thssrkr@iitmax.iit.edu

IMPORTANT: GRE and TOEFL (where applicable) scores.



K. Raghunath Rao