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VISION-LIST Digest 1988 04 20
Vision-List Digest Wed Apr 20 16:06:24 PDT 1988
- Send submissions to Vision-List@ADS.COM
- Send requests for list membership to Vision-List-Request@ADS.COM
Today's Topics:
*** Change in VISION LIST moderator
Character recognition
Digitizer boards for Q-bus
contrast and size
Recording Visual Images
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Date: Wed, 20 Apr 88 14:42:16 PST
From: Vision-List-Request@ads.com <Vision List moderator>
Subject: *** Change in VISION LIST moderator
To the Readership:
Just to let you know, there has been a change of guard. Tod
Levitt, the moderator, protector, and champion of this Vision List for
the past several years has decided to buy a sailboat and travel around
the world. (Actually, Tod's not REALLY doing that; he just thought a
change in moderatorship was due.) His efforts in expanding the
readership (now into the thousands) have made this List the primary
conversant forum for Vision and Image Processing researchers and
practicians. Tod's presence and valuable input will continue in his
submissions to this List.
The list will continue to operate as before. That is, mail
Vision List submissions to VISION-LIST@ADS.COM. Administrative
mail (e.g., adding/deleting you from the list, problems in receiving
the List) should continue to be directed to VISION-LIST-REQUEST@ADS.COM.
Please notify me of any problems you have; this changeover is likely
to cause at least a few glitches.
Since Tod assumed the moderatorship in 1985, I have been
encouraged at the solidity and diversity of the readership. Readers
vary from newcomers to the field to well-established researchers in
vision and/or image processing. The bulk of the submissions to the
List is made up of seminar announcements, requests for literature, and
specific system questions. This role is important in helping us keep
abreast of the field and it provides us with a rapid way to answer
questions by asking a large group.
Yet, this List is not being utilized to our full advantage.
When I founded this List in 1984, I had hoped there would be more
technical dialogue on vision and IP-related issues. In part, the
historically more limited role of this List is due to the great
diversity in the technical background of the readership and the
chronic time pressues most of us must endure. Even within these
constraints, I believe that submissions to this List can be expanded
in order to substantively address other important issues. I encourage
all of you to consider how you can more effectively use this List and
other readers to solve and discuss common problems and issues.
Comments to me or submitted to the List could get this going.
Phil Kahn
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From: oltz@tcgould.tn.cornell.edu (Michael Oltz)
Date: 23 Mar 88 19:27:08 GMT
Organization: Theory Center, Cornell U., Ithaca NY
Frequently-asked question #487 :-)
What are some good references re character recognition, particularly
re arbitrary typeset fonts? Algorithms requiring training for each
font would be fine, but forgiving algorithms would be helpful too.
Please respond by email and I will summarize.
Mike Oltz oltz@tcgould.tn.cornell.UUCP (607)255-8312
Cornell Computer Services
215 Computing and Communications Center
Ithaca NY 14853
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Date: Mon, 11 Apr 88 14:38:18 CDT
From: dyer@cs.wisc.edu (Chuck Dyer)
Subject: Digitizer boards for Q-bus
What vendors sell digitizer boards for the Q-bus (for Vaxstations)?
-- Chuck Dyer
dyer@cs.wisc.edu
[ All I know about is the MicroVAX II/Q-bus board(s) by Data Translation
(617) 481-3700; I've no experience with them. Let us know what you find.
-pk- ]
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From: munnari!latcs1.oz.au!suter@uunet.uu.net (David Suter)
Subject: contrast and size
Keywords: classical size illusion
Date: 12 Apr 88 11:30:46 GMT
Organization: Comp Sci, La Trobe Uni, Australia
I am seeking pointers or comments on variations upon what I believe is
called the classical size illusion: A dark square on a light
background - or the reverse - seems to be larger than it really is and
that this apparent size increases with increasing contrast.
Specifically I am interested in whether one can deduce that a 1-D
version of this (stripe instead of square) induces the same effect.
Furthermore, I am interested in explanations of this illusion. I am
aware of the explanations mentioned in van Erning et al. (Vision
Research Vol. 28 No. 3) and wonder if any radically different
explanations have been proposed.
I have tried using this newsgroup for commentary and pointers before -
without success - Is anybody out there? - or is it just that my
queries are not in the interests of subscribers. Any comments etc.
would be welcome.
[ I believe this question is well within the bounds of this List. You
may also want to post these type of questions to the Psychology
bboards/digests. -pk- ]
d.s.
David Suter ISD: +61 3 479-1311
Department of Computer Science, STD: (03) 479-1311
La Trobe University, ACSnet: suter@latcs1.oz
Bundoora, CSnet: suter@latcs1.oz
Victoria, 3083, ARPA: suter%latcs1.oz@uunet.uu.net
Australia UUCP: ...!uunet!munnari!latcs1.oz!suter
TELEX: AA33143
FAX: 03 4785814
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Date: Thu, 14 Apr 88 11:45:54 MDT
From: Wahner Brooks <wbrooks@yuma.arpa>
Subject: Recording Visual Images
Greetings,
Can anyone provide me recommendations for film/lens/filters and
exposure durations that would record an image as the "average" human
eye would see it under both photopic and scotopic conditions? Data
is required for still and motion cameras (and, if anyone has worked
with it, video). Leads to individuals or organizations working this
problem would be useful.
Thank you. Wahner Brooks <wbrooks@yuma.arpa>
602-328-2135
[ Contrast sensing after dark adaptation is scotopic (has reduced ability
to perceive color); light adapted sensing is photopic. P46 in
"Digital Picture Processing," by Rosenfeld and Kak describes the
phenomena. The index for the Optical Society of America or the
Science Citation Index might help...
-pk- ]
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End of VISION-LIST
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