Date: 29 Aug 90 13:05:53-PST
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Vision-List Digest	Wed Aug 29 13:05:54 PDT 90

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Today's Topics:

 MRF and simulated annealing for image restoration
 Vision equipment references
 Survey of vision systems for automated inspection
 Help : Separate bitmap characters
 Position available in Human Visual Perception

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Date: Thu, 23 Aug 90 16:23:01 BST
From: Guanghua Zhang <guanghua@cs.heriot-watt.ac.uk>
Subject:  MRF and simulated annealing for image restoration

Dear readers,

Anybody on in the group familar with using MRF and Simulated Annealing
for the image restoration?

It was orginally proposed in Gemans' paper and the success and robustness
of the technique was desmontrated. A series of subsequent work were reported.
Extension were made from the constant depth to piecewise smooth surfaces 
[Marroquin 1984]. But nearly all I have read just modied the original 
version for different applications.

It is diffcult to understand how the enery is assigned to each of the
clique configurations. It is related to the observations and the estimats 
 -- the Gaussian model, but how ? 

Although most of the authors claim that the parameters are chosen on a 
trial-and-error bases, it can be seen some of the common points in the
parameters.

I would like to hear comments on the technique and experiences in using it.

guanghua zhang

Computer Science
Heriot-Watt University
Edinburgh, Scotland 

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Date: Wed, 29 Aug 90 13:06:57 bst
From: Eduardo Bayro <eba@computing-maths.cardiff.ac.uk>
Subject: Vision equipment references
Organization: Univ. of Wales Coll. of Cardiff, Dept. of Electronic & Systems 
              Engineering

Dear friends !!
Does anybody knows about the Pi030 image processing system
from the company: Performance Imaging (2281 Dunstan Street,
 Oceanside , CA 92054, USA). Because its convenient price
we are thinking to buy it. This will be used by research 
fellows involved with industrial real-time applications of 
computer vision . Answers by e-mail are appreciate.
                         Eduardo//

 Eduardo Bayro, School of Electrical, Electronic and Systems Engineering,
 University of Wales College of Cardiff, Cardiff, Wales, UK.
 Internet: eba%cm.cf.ac.uk@nsfnet-relay.ac.uk        Janet:  eba@uk.ac.cf.cm
 UUCP:     eba@cf-cm.UUCP or ...!mcsun!ukc!cf-cm!eba

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Date: Tue, 28 Aug 90 15:07:54 BST
From: Netherwood P J <cs_s424@ux.kingston.ac.uk>
Subject: Survey of vision systems for automated inspection

I am currently doing a survey of vision systems to perform automated
visual inspection of surface mount solder joints. Anybody know of
any systems? (comercial or academic) If so send replys to me.

Thanks in advance

Paul Netherwood                      janet    :  P.J.Netherwood@uk.ac.kingston
Research                             internet :  P.J.Netherwood@kingston.ac.uk
                                     phone    :  (+44) 81 549 1366 ext 2923    
                                     local    :  cs_s424@ux.king  
          
School of Computer Science and Electronic Systems,
|/ingston |>olytechnic, Penrhyn Road, Kingston-upon-Thames, Surrey KT1 2EE, UK.
|\--------|--------------------------------------------------------------------
  \
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Date: Mon, 27 Aug 90 17:26:55 GMT
From: brian@ucselx.sdsu.edu (Brian Ho)
Subject: Help : Separate bitmap characters
Organization: San Diego State University Computing Services

Hello out there,
  I have some interesting problem that you may find interested and may be
  you can give me a hand/hint.

  I am currently working on a OCR (optical Character Recogniation) project.
  I am now in the stage that I need to scan a page of document, and sperate
  each character appears in the document.  The image of the document from the
  scanner will converted into (binary) bitmap format. e.g


0001111111100000000000000111000000000000000000000000000000000000000000
0001110000000000000000000111000000000110000001101110000000000000000000
0001100000000111111100001111111000011111100001111110000000000000000000
0001100000000111101110001111000000110000110001110000000000000000000111
0001111110000111000110000111000001111111110001100000000000000000011110
0001100000000111000110000110000001111111110001100000000000000000001111
0001100000000111000110000111000001110000000001100000000000000000000011
0001100000000111000110000111000000111001110001100000000000000000000000
0001111111100111000110000011111000011111100001100000000000000000000000
0001111111100010000000000000000000000000000000000000000000000000000000

  
  And I have a function that can sperate each character from the document.
  My function work fine when two characters are sperated by one or more
  (blank) column, as the example shown in above.

  My problem is when two characters are sperated less than one blank column,
  I can not distinguish/sperate the two character. (P.S. the character has
  unknown size) e.g.


000111111110000000000001110000000000000000000000000000000000000000
000111000000000000000001110000000110000001101110000000000000000000
000110000001111111000011111110011111100001111110000000000000000000
000110000001111011100011110000110000110001110000000000000000000111
000111111001110001100001110001111111110001100000000000000000011110
000110000001110001100001100001111111110001100000000000000000001111
000110000001110001100001110001110000000001100000000000000000000011
000110000001110001100001110000111001110001100000000000000000000000
000111111111110001100000111110011111100001100000000000000000000000
000111111110100000000000000000000000000000000000000000000000000000

The characters "En" and "te" are eventually appears side by side with the other
character.


I am wondering if anybody out there that can give me some advices, how to solve
this problem.  Or even someone who is facing the same type of problem, I'll like
to hear about it.. Thank you .. Thank you.....


Thank you for advance.. 

Brian

Contact me at :

brian@yucatec.sdsu.edu
brian@ucselx.sdsu.edu

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Date: 	Tue, 28 Aug 90 14:12:23 EDT
From: Color and Vision Network <CVNET%YORKVM1.bitnet@ugw.utcs.utoronto.ca>
Subject: CVNet- Position Available.

Position available in Human Visual Perception
in the Department of Experimental Psychology,
University of Oxford.

A pre- or post-doctoral research position will be available from 1st October (or
as soon as possible thereafter) for one year in the first instance (with the
possibility of renewal).  The project is funded by the Science and Engineering
Research Council of U.K. and the European Community Esprit programme.

The project is concerned with the perception and representation of 3-D surfaces
from disparity and optic flow information.  Applicants should have a background
in human psychophysics or computational vision and have an interest/experience
of research in 3-D or motion perception.

For further information, please contact:

Dr Brian Rogers,
Department of Experimental Psychology,
South Parks Road,
Oxford, OX1 3UD,
U.K.

Email:  BJR@vax.oxford.ac.uk

(I shall be at the E.C.V.P meeting in Paris, 5th-7th September)



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