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VISION-LIST Digest Volume 10 Issue 30
VISION-LIST Digest Mon Jul 15 15:13:27 PDT 91 Volume 10 : Issue 30
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Today's Topics:
3D discrete tessellation
Parallel and neural net implementations of Hough transform
Computational Medicine
Texture Measures
Camera calibration
2-D Fast Fourier Transform (FFT)
New Toshiba Still Camera ?
X-ray film scanners
Wide angle lens (C mount)
COLOR cameras?
Looking for volume rendering s/w on UNIX/X11R4
segmentation program for raw landsat data?
OCR software
University Lectureship Advert.
Image file formats summary
----------------------------------------------------------------------
Date: 1 Jul 91 07:19:04 GMT
From: paris@colotte.crin.fr (Stephane Paris)
Organization: CRIN-INRIA Lorraine, Nancy, France
Subject: 3D discrete tessellation
I am looking for algorithms for computing 3D discrete tessselation
from a set of points. Any references will be highly appreciated.
Please respond by e-mail.
Thanks in advance.
Stephane Paris - CRIN / INRIA Lorraine
EMAIL : paris@loria.crin.fr
POST : BP 239, 54506 VANDOEUVRE CEDEX, France
------------------------------
Date: Fri, 12 Jul 1991 23:16:17 GMT
From: jefff@saturn.sdsu.edu (jeff fayman)
Organization: San Diego State University, Math Dept.
Subject: Parallel and Neural Net implementations of Hough Transform
I am interested in both multiprocessor and neural network
implementations of the Hough transform for recognizing patterns in
images. If anybody has seen any literature on work done in these
areas could you please guide me to the references. If you are
interested I will send you the results of this search.
Thank you in advance.
Jeff Fayman
------------------------------
Date: Sat 29 Jun 91 21:44:36-PDT
From: Ken Laws <LAWS@ai.sri.com>
Subject: Computational Medicine
>From the Computists' Communique:
Dr. Matthew Witten is writing Frankenstein in the Machine,
a comprehensive study of high-performance computing in medicine,
dentistry, veterinary science, biology, and allied health sciences,
to be published by Pergamon Press. The work is nearing completion,
but Matt can still incorporate leads for the next month or so.
He would particularly like to hear about sources -- published or
animate -- for images and illustrations of computational results
(medical imaging, medical microscopy visualization, molecular visual-
ization, simulation, etc.) and for appropriate papers or preprints
in computational health sciences: physiology, pharmacology,
chemistry, epidemiology, biostatistics, disease and organ
modeling, cell biology, radiology, surgery, cardiology, etc.
If you have such materials or can suggest leads, please e-mail
mwitten@hermes.chpc.utexas.edu or mwitten@uthermes.bitnet, or call
(512) 471-2472; 471-2445 Fax. (If you can't suggest a lead, do
you know someone who might?) Dr. Matthew Witten, Assoc. Director,
UT System Center for High Performance Computing, Balcones Research
Center, 1.154 CMS, 10100 Burnet Road, Austin, TX 78758-4497.
------------------------------
Date: 3 Jul 91 21:33:47 GMT
Organization: Hughes Aircraft Colorado Engineering Labs
From: abirenbo@adara.cel.scg.hac.com (Aaron Birenboim)
Subject: Texture Measures
Summary: any good texture features out there?
Keywords: texture, recognition, features, statistics
I'm performing pattern recognition job, and I am looking for some
good texture-features to measure. I have a few papers, and they have
some good ideas, but I'd like to see some more.
Does anybody know of some good refrences on textures? I'm looking
for texture features which can described by a single number for a
baysian decision system.
also... is there another newsgroup i should start reading?
I saw no comp.pattern.recognition or anything.
Aaron Birenboim |I was not told to make a
abirenbo%rigel.cel.scg.hac.com@hac2arpa.hac.com|disclaimer about my opinions vs.
abirenbo@isis.cs.du.edu |those of Hughes, so I appointed
w (303) 344-6486 |myself as the voice of HAC
------------------------------
Date: Sat, 13 Jul 1991 07:22:11 GMT
From: team3d@bullet.ecf.utoronto.ca
Organization: University of Toronto, Engineering Computing Facility
Subject: Camera Calibration Test Object
Hi there, all;
I'm presently working on calibrating a two camera stereo vision system for
robot arm tracking/positioning applications (i.e. two cameras on two arms.)
Would anyone out there have any suggestions as to what a good test
object for that set up would be? Also, what would be the kind
accuracy I could hope for? I know that that depends on hardware, and
the algorithm, but give me a best figure obtainable in 'real world'
conditions using off-the-shelf cameras. (I don't want a guarantee,
just an opinion).
Also:
Would someone out there please direct me to a calibration algorithm which
uses two images of a planar test pattern as basis for calibration? I'm sure
that one exists, but I cannot seem to be able to find it anywhere. Thanks.
Thanks.
Damian
please respond to:
damian@virtual.rose.utoronto.ca,
Virtual Reality Group, Department of Computer Engineering,
University of Toronto, CANADA
------------------------------
Date: Mon, 8 Jul 1991 19:52:53 -0400
From: krishnan@theory.cs.psu.edu (Krishnan Radha)
Subject: 2-D Fast Fourier Transform (FFT)
I need to have a C-code for performing a 2-D FFT on an image as soon
as possible - it is really urgent. Any pointers to source code for
FFT will be greatly appreciated. Thanks in advance, --Radha Krishnan
(krishnan@theory.cs.psu.edu)
------------------------------
Date: Wed, 03 Jul 91 11:23:54 PDT
From: aew@eosvcr.wimsey.bc.ca (Alan Walford)
Organization: Eos Systems Inc, Vancouver, B.C., Canada
Subject: New Toshiba Still Camera ?
Hi Visioners,
I'm looking for information on and a contact at Toshiba for the new
digital still image camera from Toshiba. The camera uses a memory card
to store 6 to 12 images. The cards are read in a special reader that
is attached to your computer. Sounds like a great device for capturing
shots for image analysis etc.
It is called the Electronic Still Toshiba MC200 "Memory Card Camera".
Anybody seen it ? It was shown at the NCGA show in Chicago.
Anybody from Toshiba read this list ? Does anybody know a contact at
Toshiba where we can find out info. If I find out more info myself I'll
post it here.
Thanks,
Alan Walford Eos Systems Inc. Tel: 604-734-8655
..uunet!van-bc!eosvcr!aew OR aew@eosvcr.wimsey.bc.ca
------------------------------
Date: Mon, 1 Jul 91 10:53:20 EDT
From: rajan@rocdec.roc.wayne.edu (VARADARAJAN KRISHNAN)
Subject: x-ray film scanners
Hi,
I'm looking for scanners to digitize x-ray films with optical
densities of 3.5 and higher. I looked in Photonics buyer's guide and
could not find anyone who makes one. They all talk about cameras, or
35 mm film scanners, or document scanners. Any hints or info in this
respect will be highly appreciated. Please mail directly to
rajan@rocdec.roc.wayne.edu varada@pacvax.roc.wayne.edu or (313)
745-1670 (call collect is fine) FAX: (313) 745-2314
------------------------------
Date: Thu, 4 Jul 91 17:22:01 MET DST
From: bellutta@irst.it (Paolo Bellutta)
Organization: I.R.S.T. 38050 POVO (TRENTO) ITALY
Subject: wide angle lens (C mount)
I'm in the need of 2 C mount lens. We once bought 6.5 mm lens with
manual iris and focus, wich ad a very good geometric distortion
(almost unnoticeable). Unfortunately we are not able to buy from the
same source and the lens don't carry any brand name/model number.
Is there a source (possibly in Europe) of 6.5mm lens with no geometric
distortion and manual iris and focus?
Any info, pointers, ect. is welcome.
Paolo Bellutta
I.R.S.T. vox: +39 461 814417
loc. Pante' di Povo fax: +39 461 810851
38050 POVO (TN) e-mail: bellutta@irst.it
ITALY bellutta@irst.uucp
------------------------------
Date: Mon, 15 Jul 1991 03:37:04 GMT
From: hougen@uirvlj.ads.com (Darrell Roy Hougen)
Organization: University of Illinois at Urbana
Subject: COLOR cameras?
Summary: Want information about color cameras
Keywords: color, camera
Has anyone purchased COLOR cameras for his/her vision lab?
What are the particulars of a good camera system?
What is the Price?
What is the Quality?
What does the interface look like?
How large is the camera?
Can the cameras be conveniently mounted to a pan/tilt head?
What is the Vendor name and Address?
I will summarize and post the responses.
Thanks in advance.
Darrell Hougen
hougen@uirvld.csl.uiuc.edu
------------------------------
Date: Mon, 8 Jul 91 15:16:09 CDT
From: "Tom K. Lu" <elee7cw@Menudo.UH.EDU>
Subject: Looking for volume rendering s/w on UNIX/X11R4
Hi,there:
I'm looking for some volume rendering software (either commercial
package or in public domain) running on UNIX, X11R4 platform (esp. on
Ultrix or/and HP-UX). Does anyone have the pointers or even phone
numbers we can call in about such software?
The "sunvision" for *SunSparc2* does the similar thing and image
processing. Could it work under Ultrix/X11R4?
Please email responses!
Tom Lu E-Mail : elee7cw@menudo.uh.edu
Image Processing Group Phone : (713)749-4938
Elec. Engineering Department
University of Houston
------------------------------
Date: 4 Jul 91 10:44:54
From: psoikkon@vipunen.hut.fi (Petteri Soikkonen)
Organization: Helsinki University of Technology, Finland
Subject: segmentation program for raw landsat data?
Is there any PD segmentation program for raw satellite (landsat, SPOT)
-data? I would appreciate program, which
* is written in C or C++ (Fortran will do, but C is better)
* is small, well written and easy to understand.
Thanks,
Petteri.Soikkonen@hut.fi
------------------------------
Date: Tue, 9 Jul 1991 02:56:30 GMT
From: nkkwan@crocus.uwaterloo.ca ()
Organization: University of Waterloo
Subject: OCR software
Hi Net Reader,
I am interested in knowing anything related OCR software, i.e.,
theory, implementation and journal articles. I want to learn
about how the commercial products do it and good article about
this field.
Name of reference book or article are welcome.
Thanks.
------------------------------
Date: 8 Jul 91 14:23:37 GMT
From: Richard Prager <rwp@eng.cam.ac.uk>
Subject: University Lectureship Advert.
Keywords: lectureship job cambridge uk
CAMBRIDGE UNIVERSITY ENGINEERING DEPARTMENT
Lectureship in Artificial Intelligence/Computer Vision
A University Lectureship is advertised to recruit a person to strengthen
broad teaching in Artificial Intelligence and particular research in
computer vision in robotics. The appointment is in the Information Division
headed by Professor Frank Fallside, which includes the disciplines of
Computing, Control and Communications. Teaching includes lectures to final
year students on AI principles and applications such as computer vision
and robotics, labs and projects. These subjects attract large numbers of
students and we wish to strengthen teaching as a result.
The research group is mainly concentrated on speech processing but includes
other ai applications such as computer vision and robotics centred around
fundamental problems in scene understanding, geometric reasoning, path
planning and assembly planning, rather than robotics technology. The group's
interests include algorithmic, probabilistic, neural network and rule-based
techniques and their applications. It is also interested in parallelism and
makes extensive use of a 64-transputer array. Other facilities include a
network of Suns etc.
The group currently has 5 tenured staff, 2 SERC Advanced Research Fellows,
5 RAs and 39 research students. The appointment is to strengthen and build
up the computer vision side. The group has strong support from UK and
European research grants etc. The appointee will be expected to build this up
on the computer vision robotics side and to supervise research students.
The person appointed will have relevant qualifications and a good research
record in computer vision.
The advertised closing date is 18 July 1991. The intention is to appoint on
1 October 1991 or soon after, although a later start could be entertained.
The appointment is initially for 3 years, followed by tenure appropriately.
Current UL scales are in range 15,444 - 23,819 UKL.
Application forms and further details from:
Dr D.J. Payne
Secretary of the Faculty Board of Engineering
Cambridge University
Trumpington St
Cambridge CB2 1PZ
Tel (223) 332618
Fax (223) 332662
also e-mail fallside@eng.cam.ac.uk
------------------------------
Date: Wed, 3 Jul 91 17:14:19 +0200
From: j_goncalves@cen.jrc.it (Joao Goncalves)
Subject: Image file formats summary
Hello everybody,
About one month ago, I posted a request for information on image file formats.
Though I did not receive a lot of answers (Thanks to all those that answered),
I did receive a lot of requests for the results. This confirms my view, that
the situation of image file formats is a bit messy, and a lot of people,
including myself, are confused with such diversity. I decided to post the
answers rather than sending them to those who have requested.
* Ray Suorsa (grendel@opos.arc.nasa.gov) send the results of a questionnaire
on image file formats, and some observations based on the 108 responses.
There is a list of 99 file formats being used, though most of them with only
one preference. I'll list below those with 4 or more preferences:
56 GIF 32 PBM/PGM/PPM
32 TIFF 28 Sun Rasterfile
25 Homebrew 16 Utah RLE
15 PostScript (incl. encapsulated PS) 13 XBM (X11R4 BitMap)
11 XWD 10 Targa
9 FITS 9 SGI (Silicon Graphics)
7 IFF 7 PICT
7 PICT2 6 PCX (WINDOWS)
5 BMP (WINDOWS) 4 FBM
4 GEM (.IMG) 4 HDF
4 HIPS
By the way though, JPEG had only 2 preferences, it was the format that 9 people
would want to use in a near future.
* Dr. Ming XIE (ming.xie@mirsa.inria.fr) sent a description of a TIFF like
format, called DSF (Data Storage Format) aiming the storage of all sort of
results generated by a dynamic vision system (e.g., camera parameters, image
sequences, sets of contour chains, etc..). DSV is implemented as C++ class.
It looked to me an interesting idea. Contact Ming Xie for details.
* Some people have sent some references on where to find details about
image formats. I am transcribing the references, though I haven't yet accessed
them all.
* " A Survey of Computer Graphics Image Encoding and Storage Formats"
Wayne E. Carlson, Computer Graphics, vol.25. No.2, Apr.1991.
* "Bit Mapped Graphics" by Steve Rimmer, Publisher Windcrest Books, ISBN
0-8306-3558-0 (US$26.95)
TIFF: There is a whole chapter on TIFF in the Microsoft Windows Development
Kit manual. It is a well written text with some examples and advice on
how to write TIFF readers or writers. There is an interesting
discussion on what are the advantages and disadvantages of fixed
format files, and tagged formats.
I found the TIFF format very powerful, though very complicated to
implement, specially the TIFF reader. It looks like it is a format to
stay for a long time. Microsoft actually manages all TIFF developments
and extensions.
PostScript: I read the PostScript manual, and found that it was reasonably
easy to write a program to convert a grey level image into PostScript.
PostScript and TIFF do not compete, since the former is basically a
way of describing a page layout (that may include images). TIFF aims
to be a exchange image file format for DeskTop Publishing.
GIF and TIFF: "Graphics Formats" by GL Graef, Byte, Sept. 1989, pp 305-310
ISO Standard: Recently (Digest No.25), there was a proposal for an ISO
(International Standards Office) standard for image format.
Well, that's all. If you have any more informations on Image formats please let
me know. Thanks.
Joao Goncalves
Commission of the European Communities tel: 39 + 332 + 789 416
Joint Research Centre fax: 39 + 332 +78 185
21020 Ispra (VA) E-mail: j_goncalves@cen.jrc.it
Italy
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End of VISION-LIST digest 10.30
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