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The Journal of Neuroscience, December 1994, 14(12): 7357-7366 Transparent Motion Perception as Detection of Unbalanced Motion
 

Summary: The Journal of Neuroscience, December 1994, 14(12): 7357-7366
Transparent Motion Perception as Detection of Unbalanced Motion
Signals. I. Psychophysics
Ning Qian,a Richard A. Andersen, and Edward H. Adelson
Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
Our visual system can solve the difficult problem of repre-
senting multiple motions in the same part of the visual space,
the motion transparency problem. We investigated the con-
ditions under which transparent motion perception occurs
through psychophysical observations, using a series of vi-
sual displays composed of two simple patterns moving in
opposite directions. We found that whenever a display has
finely balanced opposing motion signals in all local regions,
it is perceptually nontransparent. The displays that appeared
transparent always contain locally unbalanced motion sig-
nals, with some local regions having net motion signals in
one direction and some other regions in the opposite direc-
tion. These interdigitating net motion signals in both direc-
tions appear to be integrated separately to form two over-
lapping transparent surfaces. Displays that were spatially

  

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

 

Collections: Biology and Medicine