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The Journal of Neuroscience, September 1991, 7 f(9): 2766-2765 The Response of Area MT and VI Neurons to Transparent Motion
 

Summary: The Journal of Neuroscience, September 1991, 7 f(9): 2766-2765
The Response of Area MT and VI Neurons to Transparent Motion
Robert J. Snowden," Stefan Treue, Roger G. Erickson,b and Richard A. Andersen
Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
An important use of motion information is to segment a com-
plex visual scene into surfaces and objects. Transparent
motions present a particularly difficult problem for segmen-
tation because more than one velocity vector occurs at each
local region in the image, and current machine vision sys-
tems fail in these circumstances. The fact that motion trans-
parency is prevalent in natural scenes, and yet artificial sys-
tems display an inability to analyze it, suggests that the
primate visual system has developed specialized methods
for perceiving transparent motion. Also, the currently prev-
alent model of physiological mechanisms for motion-direc-
tion selectivity employs inhibitory interactions between neu-
rons; such interactions would silence neurons under
transparent conditions and render the visual system blind
to transparent motion. To examine how the primate visual
system solves this transparency problem, we recorded the

  

Source: Andersen, Richard - Division of Biology, California Institute of Technology

 

Collections: Biology and Medicine