NetNews Usenet Archive 1992 #18/NN_1992_18.iso/spool/comp/ai/vision/27

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From: [e-mail] (Vision-List moderator Phil Kahn)
Newsgroups: comp.ai.vision
Subject: VISION-LIST digest 11.27
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Date: 10 Aug 92 22:28:49 GMT
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VISION-LIST Digest    Mon Aug 10 14:28:50 PDT 92     Volume 11 : Issue 27

 - Send submissions to [e-mail]
 - Vision List Digest available via COMP.AI.VISION newsgroup
 - If you don't have access to COMP.AI.VISION, request list
   membership to [e-mail]
 - Access Vision List Archives via anonymous ftp to FTP.ADS.COM

Today's Topics:

 Re: Motorized Lenses
 Re: Motorized lenses
 Re: Motorized lenses
 Frame grabber boards
 Stereo Images
 Images Needed
 Need color textures
 Amoco position correction
 JOB ANNOUNCEMENT: Post-Doc in machine learning/computer vision
 One year  research  associateship
 Computer Vision Symposium
 Tech Report: Neural Model of Visual Attention & Invariant PR

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

Date: Tue, 21 Jul 92 03:48:52 -0400
From: Payman Khalili <[e-mail]>
Subject: Re:  Motorized Lenses

Marapane Suresh ([e-mail]) writes:

> I am interested in purchasing a couple of lenses that have
> electric motors WITH feedback to operate zoom, focus, and
> iris. Does anyone know where I can buy such lenses?
>
> Thanks in advance.

Well, I did research this area quite a bit.  However, we never
purchased such a system.  Here is all the information which I
gathered.  I hope someone in netland finds it useful!

I know for a fact that Fujinon and Cosmicar make motorized lenses.
However, I am not sure what kind of feedback you are looking for.
I believe the lenses sold by these manufacturers simply have a motor
on them and they use a simple potentiometer for feedback.

Depending on what model lens you decide to purchase, you can control
one or all of zoom, focus, and iris.  The price range for such lenses
(lens alone!) is from $1000 (6x zoom lens, fully motorized) to $5000 (14x
zoom lens, fully motorized).  These prices are about 2 years old.

Fujinon lenses are available through the following suppliers (and maybe
others too):

D.O. Industries, Inc.
200 Commerce Dr.,
Rochester, NY 14623
[phone]
(716) 359-400

Cosmicar lenses are available through (and maybe others too):

Chori America, Inc.,
One Penn Plaza, Suite 5440,
New York, NY 10119
[phone]

Furthermore, there is a company called VICON which makes motorized
lenses.  I don't know what kind of feedback these lenses provide.
But, they do provide feedback.  Their address is:

VICON Industries, Inc.
Corp. Headquarters
125 E. Bethpage Rd.,
Plainview, NY 11803
[phone]
[phone]

In addition, there is a company called TS Products who will custom make
such a lens as well as the controller for it.  I believe that University
of Illinois has purchased two such lenses from them.  The system which
they sell comes complete with lens, controller, and software, etc. and
can be connected to a computer via a serial port.

I believe that they modify a (motorized) Vicon Lens to make such a system.
They remove the original motor and install one of their own DC micromotors.
Furthermore, I think they add a digital encoder on the lens for precise
feedback.

The price which they quoted me for this (single lens) system is $11,700.

Their address is:

TS Products,
12455 Branford St., Bldg. 22
Arleta, CA 91331, USA
[phone]

Well, thats's all folks!  Good luck...

     -- Payman Khalili ([e-mail])

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

Date: Tue, 21 Jul 92 11:35:55 +0200
From: Joao Goncalves <[e-mail]>
Subject: Re: Motorized lenses

We are using motorized lenses from ERNITEC, a danish company (see address
below). We have two M10Z10 lenses with the following characteristics:
        * focal length:  10.0 -> 100.0 mm
        * aperture F1.2
        * Auto iris (8-18VDC)
        * Potentiometers on Zoom and Focus

We built our own driving system (very simple: 2 A/D converters, and motor
control based on a ON/OFF drive, and a electronic switch for direct and
reverse motion - 6 or 12 Volt DC)

They have other models with feedback pots: M8Z6, M12Z6, M17Z6, M16Z10
MxxZyy:   minimum focal length = xx mm
          maximum focal length = xx * yy mm

The quality of the optics is not super, but it suits our needs.

ERNITEC: Horkaer 22-24, DK 2730 Herlev, Denmark
         tel: 45 + 44 92 30 00
         fax: 45 + 44 92 72 82

Joao G.M. Goncalves
CEC - Joint Research Centre             tel: 39 + 332 + 789 416
21020 Ispra (VA)                        fax: 39 + 332 + 789 185
ITALY                                E-mail: [e-mail]

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

Date: Tue, 28 Jul 92 11:36:32 MDT
From: [e-mail]
Organization:     Lab of Image Analysis, IES, Aalborg University
Subject: Motorised lenses

Hello,

Motorized lenses are available from a number of companies, examples are:

Ernitec, Denmark:

Zoom, Focus, Aperture (DC motor control)
Available with the following options

    TYPE    Focal length    Max Aperture
    m8z6    8-48 mm        F1.2
    m12z6    12-75 mm    F1.2
    m10z10    10-100 mm    F.16
    m17z6    17-105 mm    F1.8
    m16z10    16-160 mm    F1.8

There is feedback for zoom, focus and aperture (also available with
autoiris). Feeddback through 5K potentiometers.

Ernitec is a production company and you will have to buy through a
distributor such as Antech A/S, Bygaden 51A, 4040 Jyllinge, Denmark
Phone: [phone].
//////////////////////////////////////////////////
VideoTronic Uwe Bischke GMBH, Lahnstrasse 1, 2350 Neumunster 6, Germany
Phone: [phone]

The following options are available:

    Type    Focal Length    Aperture
    575738    8-48 mm        F1.2
    530303    12.5-75    mm    F1.8
    575740    15-90 mm    F1.8
    530271    17-102 mm    F2.0

All lenses have DC motors. Feedback for zoom and focus and autoiris.
Feedback exploits 5K potentiometers.
//////////////////////////////////////////////////
Vista Vision Systems, Levanroy House, Deanes Close, Stevenson,
Oxfordshire OX13 6SR, UK., Phone [phone]

Motorised lense 7 - 60 mm with potentiometer feedback from focus, zoom
and aperture (5Kohm). All motors are DC with a nominal voltage of 12 V
(30 mA)
//////////////////////////////////////////////////
Electronique Informatique Applications, Multipole BP-6, 41 - Chemin de
Vieux chene, 38241 MEYLAN Cedex, Phone [phone].

Motorised lenses in two options:

    Servolens
    X6        12-75 mm     F1.6
    X10        10-100 mm    F1.6

Moth lenses are equipped with a microcontrooler and the interface is
thus an RS-232 serial line through which one may interact with the
lens controller using a simple command language.

Regards,

Henrik I Christensen

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

Date: 23 Jul 92 07:28:38 GMT
From: [e-mail] (Olivier de Vel)
Organization: James Cook University
Subject: Frame grabber boards
Keywords: frame grabber, PC AT

We are interested in purchasing a DataTranslation QuickCapture
frame grabber board for the PC AT.

Anybody have any experience with this board (advantages and
disavantages etc...).

Thanks,
Olivier de Vel
Dept of Computer Science
James Cook University
Townsville Q4811
AUSTRALIA

[e-mail]

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

Date: Tue, 4 Aug 1992 19:59:34 GMT
From: [e-mail] (Amol Bokil)
Organization: School of Engineering and Applied Science
Subject: Stereo Images

Hi,
  We are interseted in acquiring epipolar stereo images (hopefully with
their true disparity maps) and as such would be very grateful if someone could
make them available to us or provide pointers to where they might be obtained
from.  Please respond to [e-mail].

Thanks

Amol

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

Date: Tue, 28 Jul 1992 12:23:40 GMT
From: [e-mail] (Jagath Rajapakse)
Subject: Images Needed

 Hello everybody,

   I am looking for the following images for some experiments relating to
   my thesis.
    (1). Pentagon Building Image.
    (2). An intensity image and A range image taken from the same
         scene (registered).

   If anyone willing to provide me with the above image/s, could email
   me at [e-mail] .

  thanks for your kind consideration.

  -Jagath Rajapakse
   Dept of Electrical Engineering.
   SUNY  at Buffalo.

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

Date: Thu, 30 Jul 92 18:52:11 BST
From: [e-mail] (Tieniu Tan)
Subject: Need color textures

Dear Colleagues,

Some of my current research work requires the use of color textures. I would
greatly appreciate pointers to possible FTP sites where color textures
(preferablly in SUN raster format) are freely available.

Please send your reply to me directly.

Thanks in advance.

TNT.

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

Date: Thu, 23 Jul 92 11:34:25 CDT
From: [e-mail] (Amir Waks)
Subject: Amoco position correction

The previous announcement of the position was mistaken in the following sense.
The candidate should possess MS/Ph.D and not BS/MS.

Amir Waks, Ph.D
Amoco Technology Company
Mail Code F-2
P.O. Box 3011
Naperville, IL  60566

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

Date: Wed, 29 Jul 92 23:07:37 GMT
From: [e-mail] (Gregory J. Wolff)
Organization: RICOH California Research Center
Subject: JOB ANNOUNCEMENT: Post-Doc in machine learning/computer vision
Keywords: job, learning theory, image processing, vision

POST-DOCTORAL POSITION AVAILABLE

The Machine Learning and Perception Group at The Ricoh California
Research Center seeks an exceptionally talented candidate for a one-year
post-doctoral position in either of the following two areas:

1) Computational learning theory
The ideal candidate will have knowledge of theories of learning and
generalization (Vapnik-Chervonenkis dimension, Kolmogorov methods,
Probably Approximately Correct methods,...), information theory (Akaike
and Fisher information, Cramer-Rao bounds,...), and connectionist learning
methods (backpropagation, Boltzmann learning,...).  C programming ability
and experience with parallel and connectionist learning systems is highly
desirable.  The successful candidate will have access to extremely powerful
learning machines at Ricoh, such as an Adaptive Solutions, Inc. CNAPS
Neurocomputer and an in-house giga-connection update/second Boltzmann
learning machine, for fundamental and applied studies of computational
learning theory.

2) Computer vision and understanding
The ideal candidate will have knowledge and experience with visual feature
detection methods, motion estimation, shape from shading, adaptive visual
processing, model based recognition, and be an accomplished C
programmer.  A knowledge of lip reading and speech recognition is highly
desirable.

A completed dissertation is expected.

The Ricoh California Research Center
Nestled at the base of the panoramic Palo Alto Hills, The Ricoh California
Research Center is adjacent to hundreds of acres of wildland and is within
walking distance of Stanford University and easy driving distance of
Berkeley, Santa Cruz and other San Francisco Bay Area research centers.
Research areas at CRC include Machine Learning and Perception; Color
Image Processing; Document Analysis; Remote Diagnostics and Parallel
Image Processing.  There is an extensive UNIX-based network of SUN,
Silicon Graphics and other workstations, graphics capability, and an in-
house learning machine mentioned above.  We expect to have an ASI
Neurocomputer by the time the post-doc has arrived.  Accounts on
Connection Machine and MassPar supercomputers are also possible.

Please send a letter describing research interests and curriculum vita and one
or two representative papers/conference papers/dissertation chapters to the
address below.  (Please do not have letters of recommendation sent at this
time; neither should you send your vita by e-mail.)

Questions may be addressed to:  [e-mail] or the address below.
Send application to:

Dr. David G. Stork
Ricoh California Research Center
2882 Sand Hill Road Suite 115
Menlo Park, CA 94025-7022            attn:  Post-doc position

Ricoh Corporation, an equal opportunity/affirmative action employer.
M/F/H/V.  Must be able to legally work in the U.S. on a full time basis.

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

Date: Mon, 3 Aug 92 12:24:07
From: [e-mail]
Subject: One year  research  associateship

Applications are invited a one year  research  associateship
within the department of Computer Science on a DTI/SERC JFIT
research project. The post is available from  mid  september
1992.    Applicants  should  preferably    have programming and
research experience of computer vision and neural  networks.
Furthermore, a knowledge of C is required, preferably with a
knowledge of UNIX and X windows.

The work is in the domain of automated    visual    guidance  of
airborne  vehicles. In particular, the development of paral-
lel vision algorithms, based on neural networks. A major aim
is  to    develop  methods  for  combining  high and low level
information in the recognition process.

The project is    in  collaboration  with  the  University  of
Surrey,  RSRE  Malvern    and British Aerospace plc.  Salaries
will be on the 1A  scale  (12,129-14,936  pounds  sterling).
Informal  enquiries  may  be  made  to    Dr. Jim Austin (0904
432734, email: [e-mail]). Further  particu-
lars  may  be  obtained  from  The  Registrar's  Department,
University of York, Heslington, York, YO1 5DD,    UK  to    whom
three copies of a curriculum vitae should be sent. The clos-
ing date for applications is Friday 14th August 1992. Please
quote reference number 6401.

               August 3, 1992

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

Date: Mon, 10 Aug 92 17:31:45 GMT
From: [e-mail] (Gregory Dudek)
Organization: McGill Research Centre for Intelligent Machines
Subject: Computer Vision Symposium

Computer Vision:  Introduction and Perspectives

A tutorial and presentation of current research results
for industry managers, scientists, and engineers.

FOR MORE INFORMATION, REPLY TO
    email: [e-mail]
    telephone number: [phone]
NOT TO THE POSTER OF THIS MESSAGE.

The McGill Research Centre for Intelligent Machines and
The Centre de recherche informatique de Montreal
will be holding a 2-day symposium on computational vision
in Montreal, Canada.  There will be one tutorial day and one
day presenting state-of-the-art research and lab demos.
The will also be selected industrial exhibitors.

Monday, September 14th and
Tuesday, September 15th, 1992

************************

This symposium has two objectives.  On the first day, it will
introduce computer vision to the non--expert and deal with
fundamental approaches to processing and interpreting visual data.
This will provide the background on basic tools and techniques for
solving various types of vision problems which may arise in your
workplace.  It will also address the limitations of convential
computer vision systems.

On the second day, selected state--of--the--art approaches to
outstanding problems in computer vision problems will be presented
by researchers form the McGill Research Centre for Intelligent Machines.
In all, this symposium will present a picture of what is feasible with
current computer vision methods and technology, and how they can be
applied.  In addition, it will indicate where the field is headed and
what potential opportunities are likely to appear in the near future.


LOGISTICAL INFORMATION AND REGISTRATION FORM

Programme and Organizing Committee:
Margaret Dalziel, Gregory Dudek, Julian Lebensold

$300 for both days, $200 for one day (either),
less $50 for CRIM and PRECARN members.
$50 off for early registration.

A limited number of student spaces will be available without
charge on a first come, first served basis.

For information call:  [phone]
Email:  [e-mail]
Fax:  [phone]

*********************************

FOR MORE INFORMATION, REPLY TO
    email: [e-mail]
    telephone number: [phone]
NOT TO THE POSTER OF THIS MESSAGE.

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

Date: Fri, 7 Aug 92 22:53:27 PDT
From: [e-mail] (Bruno Olshausen)
Subject: Tech Report: Neural Model of Visual Attention & Invariant PR


The following technical report has been archived for public ftp:

 A NEURAL MODEL OF VISUAL ATTENTION AND INVARIANT PATTERN RECOGNITION

       Bruno Olshausen, Charles Anderson*, and David Van Essen

        Computation and Neural Systems Program
             Division of Biology, 216-76
                 and
              *Jet Propulsion Laboratory
          California Institute of Technology
              Pasadena, CA 91125

                 CNS Memo 18

Abstract.  We present a biologically plausible model of an attentional
mechanism for forming position- and scale-invariant object
representations.  The model is based on using control neurons to
dynamically modify the synaptic strengths of intra-cortical
connections so that information from a windowed region of primary
visual cortex, V1, is routed to higher cortical areas while preserving
information about spatial relationships.  This paper describes details
of a neural circuit for routing visual information and provides a
solution for controlling the circuit as part of an autonomous
attentional system for recognizing objects.  The model is designed to
be consistent with known neurophysiology, neuroanatomy, and
psychophysics, and it makes a variety of experimentally testable
predictions.

*********************************

Obtaining the paper via anonymous ftp:

1. ftp to kant.cns.caltech.edu (131.215.135.31)

2. login as 'anonymous' and type your email address as the password

3. cd to pub/cnsmemo.18

4. set transfer mode to binary (type 'binary' at the prompt)

5. get either 'paper-apple.tar.Z' or 'paper-sparc.tar.Z'.  The first
will print on the Apple LaserWriter II, the other on the SPARCprinter.
(They may work on other PostScript printers too, but I can't guarantee it.)

6. quit from ftp, and then uncompress and detar the file on your
machine by typing

    uncompress -c filename.tar.Z | tar xvf -

7. remove the tarfile and print out the three postscript files
(paper1.ps, paper2.ps and paper3.ps), beginning with paper3.ps.

If you don't have an appropriate PostScript printer, then send a
request for a hardcopy to [e-mail].

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

End of VISION-LIST digest 11.27
************************