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Proc. Natl. Acad. Sci. USA Vol. 94, pp. 34773480, April 1997
 

Summary: Proc. Natl. Acad. Sci. USA
Vol. 94, pp. 34773480, April 1997
Psychology
Reciprocal interactions between occlusion and
motion computations
BARTON L. ANDERSON* AND PAWAN SINHA
Massachusetts Institute of Technology, Cambridge, MA 02139
Communicated by Bela Julesz, Rutgers University, Piscataway, NJ, January 22, 1997 (received for review November 8, 1996)
ABSTRACT The ``aperture problem'' refers to the inher-
ent ambiguity of the motion generated by an untextured
contour moving within an aperture. The limited spatial extent
of the receptive fields of neurons in cortical areas like V1 and
MT render them susceptible to this problem. Most psycho-
physical experiments have probed how the visual system
overcomes the aperture problem by presenting moving con-
tours behind one or more simulated apertures. The assump-
tion has been that the computational ambiguities that arise in
resolving these displays are equivalent to the computational
problems created by receptive fields that sample a small
region of visual space. Evidence is presented here that chal-

  

Source: Anderson, Barton L. - School of Psychology, University of Sydney

 

Collections: Biology and Medicine