Date: 08 Jun 90 16:37:22-PST
From: Vision-List moderator Phil Kahn <Vision-List-Request@ADS.COM>
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Vision-List Digest	Fri Jun 08 16:37:23 PDT 90

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Today's Topics:

 List of industrial vision companies
 Curvature for 2-D closed boundary description
 Array Technologies Color Scanner
 CVGIP table of contents: Vol. 51, No. 2, August 1990
 ECEM6 1991 Eye-Movements Conference, First Call
 Evans & Sutherland PS390 FOR SALE!!

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Date: 4 Jun 90 19:45:50 GMT
From: Brian Palmer <bpalmer@BBN.COM>
Subject: List of industrial vision companies
Organization: Bolt Beranek and Newman Inc., Cambridge MA

Well Samir and my attempts to generate a list of Industrial Vision
companies is going slowly.  Please continue to send info!  I will post
the summary.

The final posting will contain all related information but for now
here is the list of companies mentioned.

	Automatix
	Cognex
	Datacube
	View Engineering (still alive?)
	Adept 
	GMF
	Intelledex
	Focus Systems

Please send more names and a little info on the company.  Also, if you know
anything about the above (some descriptions were short) please pass that
along too.

Thanks,
Brian

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Date: 6 Jun 90 23:17:11 GMT
From: zeitzew@CS.UCLA.EDU (Michael Zeitzew)
Subject: Curvature for 2-D closed boundary description
Organization: UCLA Computer Science Department

From:
O. Mitchell and T. Grogan
"Global and Partial Shape Discrimination for Computer Vision"
Optical Engineering,
     Volume 23, Number 5, September 1984. pg.484-491

A portion (section on the Fourier-Mellin Correlation) can 
be summarized as follows :

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
If the boundary function $z(i) = x(i) + \jmath y(i)$ is twice differentiable,
the the curvature function, denoted by $\kappa(i)$ is given by :
\[ \kappa(t) = \partial / \partial t \;\; \arctan \dot{y}(t) / \dot{x}(t) \]
A discrete approximation of the curvature is :
\begin{eqnarray}
\kappa(i) = \arctan \frac{y_{i} - y_{i-1}}{x_{i} - x{i-1}} - \\
\arctan \frac{y_{i-1} - y_{i-2}}{x_{i-1} - x_{i-2}} \;\;i=0,\ldots,N-1 \nonumber
\end{eqnarray}

The curvature function provides a contour description which is invariant
under translation and rotation.....
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Does anyone know why the definition of curvature is given as the
partial derivative with respect to "time", and not "arc length" as
one would see in a first year Calculus book ? What are the
assumptions/implications here ?

If this is a stupid/obvious/boring question, I'm sorry. If you care
to e-mail me a response, thank you in advance.

Mike Zeitzew
zeitzew@lanai.cs.ucla.edu

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

Date: Thu, 7 Jun 90 10:07:32 EDT
From: marra@jargon.whoi.edu (Marty Marra)
Subject: Array Technologies Color Scanner

Does anyone have experience working with an Array Technologies Color
Scanner?  Ideally I'd like to control their "image server" from my Sun
via GPIB. Any general info about these scanners would also be greatly
appreciated.

Thanks.

 /\/\   /\/\  Marty Marra, Woods Hole Oceanographic Institution  (WHOI DSL)
/    \ /    \ Woods Hole, MA 02543 "marra@jargon.whoi.edu" (508)457-2000x3234

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

Date: Fri, 1 Jun 90 13:08:02 -0700
From: graham@cs.washington.edu (Stephen Graham)
Subject: CVGIP table of contents: Vol. 51, No. 2, August 1990

COMPUTER VISION, GRAPHICS, AND IMAGE PROCESSING			              .  	
Volume 51, Number 2, August 1990

CONTENTS

A. Huertas, W. Cole, and R. Nevatia.  Detecting Runways in Complex Airport
	Scenes, p. 107.

Maylor K. Leung and Yee-Hong Yang.  Dynamic Strip Algorithm in Curve Fitting, 
	p. 146.

Josef Bigun.  A Structure Feature for Some Image Processing Applications Based
	on Spiral Functions, p. 166.

Lawrence O'Gorman.  k x k Thinning, p. 195.

ANNOUNCEMENTS, p. 216.

ABSTRACTS OF PAPERS ACCEPTED FOR PUBLICATION, p. 217.


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

Date:         Fri, 08 Jun 90 15:36:42 +0200
From: ECEM6 <FPAAS91%BLEKUL11.BITNET@CUNYVM.CUNY.EDU>
Subject:      ECEM6 1991 Eye-Movements Conference, First Call
Organization: 6th European Conference on Eye Movements

        6th European Conference on Eye Movements
             15 - 18 september 1991
                 Leuven, Belgium

          First Announcement & Call for Papers

      AIM

      This is the sixth  meeting of the European Scientists  actively
      involved in  eye movement research and is  the successor to the
      first  meeting  held   in  Bern   (Switzerland)  in  1981,   an
      initiative  of the  European  Group for  Eye  Movement Research
      (for more information  on the  Group: R. Groner,  Laupenstrasse
      4, CH-3008 Bern, Switzerland). The aim of the Conference is  to
      promote  the  wider  exchange  of  information  concerning  eye
      movement research in all its  diverse fields, and to  encourage
      contact  between  basic  and applied  research.  The Conference
      will  be of interest  to psychologists, educational scientists,
      neurophysiologists,  medical doctors, bioengineers, ergonomists
      and others interested in visual science.

      VENUE

      The Conference  will be held  at the Department  of Psychology,
      University  of Leuven, Belgium, and  many presentations will be
      given in the Michotte Lecture Hall of the Department.

      CALL FOR PAPERS AND POSTERS

      If you wish to present a paper or a  poster, please send a one-
      page abstract  by January  31, 1991,  at the  very latest.  The
      selection  of posters or papers to be presented will be made by
      a  committee including  all  preceding  organizers of  E.C.E.M.
      (with notifications  to the  proposers in  April 1991).  Papers
      and   posters   on   the    following   topics   are   welcome:
      Neurophysiology   of   eye    movements,   oculomotor   system,
      measurement   techniques,  eye  movements   in  perceptual  and
      cognitive  tasks,   eye  movements   and  reading,   oculomotor
      disorders,  and applied  research.  Papers integrating  sensory
      sciences  and higher-order studies will  be favored. Papers and
      posters  should  be in  English,  and the  presentation  of the
      paper should not exceed 20 minutes.

      CONFERENCE PUBLICATIONS

      If your  paper is selected for presentation,  you will be asked
      to  resubmit  your  abstract  in  the form  specified  for  the
      publication in the  Congress Proceedings.  This volume will  be
      made  available at the  beginning of the  Conference. An edited
      volume   of  selected  papers  will   be  published  after  the
      Conference  by  North-Holland  Publishing  Company in  the  new
      series  "Studies  in  Visual  Information  Processing"  (Series
      Editors: R. Groner & G. d'Ydewalle).

      SECOND AND FINAL CALL

      The second and  final call will be  forwarded to all those  who
      submitted a paper and poster abstract. If you do  not submit an
      abstract and you  want to receive  the final call, please  give
      your address in the attached  information sheet. The final call
      will  include  more  details  on  the  programmes  as  well  as
      information on registration and accommodation.

      The organizers of  the conference will  be happy to answer  any
      questions  you  may have.  Our  address is  given  here at  the
      bottom line of the letter.

         ___   __
        /     /               6th European Conference on Eye Movements
       /---  /                         15 - 18 september 1991
      /___  /____                          Leuven, Belgium
     ___   __  __  l
    /     / l /  l l___        Laboratory of Experimental Psychology
   /---  /  l/   l l   l           Katholieke Unversiteit Leuven
  /___  /        l l___l             B-3000     Leuven, Belgium

  FPAAS91@BLEKUL11.EARN     Presidents: Gery d'Ydewalle & Eric De Corte
  tel: (32)(16) 28 59 65         Organizer: Johan Van Rensbergen
  fax: (32)(16) 28 60 99                                                99

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

Date: Mon, 4 Jun 90 15:48:52 CDT
From: ssmith (Sean Smith)
Subject: Evans & Sutherland PS390 FOR SALE!!

Evans & Sutherland PS390 (includes):
                        Graphics Control processor with 2 dual-sided Floppies
                        2 Megabytes Memory
                        Display Processor
                        19" Color Raster Monitor
                        RS-232C interface
                        PS390 System Firmware, Host Software and License
                        5 Volume user set
                        Ethernet Interface
                        1 Megabyte Memory
                        Keyboard w/led display
                        Control Dials w/LED display
                        Tablet 6" x 6" (active area)

*****Please contact Sean Smith
                    (713)363-8494
                    ssmith@bcm.tmc.edu
Please pass this message on to interested users.



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End of VISION-LIST
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