Conference heron::euro_swas_ai

326.0. "Seminar on vision in DEC CRL" by YIPPEE::TARANTOLA (Carlo *AI IST* @VBE) Thu Apr 25 1991 14:54

From:	CRL::MARYG "Mary Gallagher" 24-APR-1991 20:57:36.82
To:	yippee::tarantola 
CC:	
Subj:	Visual Surface Perception - Digital Cambridge Research Lab - May 15 

                     Digital Equipment Corporation
                        Cambridge Research Lab 
                               Seminar
 
                         Wednesday, May 15, 1991
                  3:15pm - 4:15pm, Refreshments at 3:00pm
 
	               "Visual Surface Perception"
 
			     Ken Nakayama
		       Department of Psychology
			  Harvard University
 
 
Because we live in a 3 dimensional world, along any given general
direction, our visual system is often confronted with multiple surfaces,
not just a single surface.  We make the working assumption that our
visual system and those of other animals have developed (possibly through
learning), very specific and probably "low level" mechanisms for dealing
with these ever-present and unavoidable situations.  Thus we think that
occlusive relations in the world are processed very early in the visual
system of primates, probably as early as the primary visual cortex.  In
addition, we propose the "generic view principle" to understand why the
visual system encodes: 1) surfaces continuing behind other surfaces, 2).
surfaces completing accross other surfaces (as in subjective contours),
3) perceived transparency in very simple stereograms.
 
A set of visually unexpected and surprising stereoscopic demonstrations 
will accompany the talk.
 
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Ken Nakayama is Professor of Psychology, Faculty of Arts and Sciences at
Harvard University.  He received his Ph.D. degree from U.C.L.A in the
late 1960s.  After doing a post-doctoral fellowship at U.C. Berkeley, and
teaching at a medical school in Canada, he spent nearly the last 20 years
as a senior scientist at Smith Kettlewell Eye Research Institute in San
Francisco.  His early interests and work concentrated on low-level
vision, including the processing of neural signals in the retina and
lateral geniculate as well as studying eye rotations.  More recently, he
has become interested in intermediate level vision, using psychophysical
methods of investigation.
 
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Digital Equipment Corporation's Cambridge Research Lab is located on the
north side of Technology Square, at the junction of Hampshire Street and 
Broadway.  The address is:
 
     Digital Equipment Corporation
     Cambridge Research Lab
     One Kendall Square, Bldg. 700
     Cambridge, MA 02139
 
For questions regarding the seminar, directions, or parking, or to add 
your name to the mailing list, call DTN: 259-6601 or send email to 
crl::tss
 
 
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To: yippee::tarantola
Subject: Visual Surface Perception - Digital Cambridge Research Lab - May 15
Date: Wed, 24 Apr 91 09:49:37 EDT
From: maryg