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Neuron, Vol. 24, 919928, December, 1999, Copyright 1999 by Cell Press Stereoscopic Surface Perception

Summary: Neuron, Vol. 24, 919928, December, 1999, Copyright 1999 by Cell Press
Stereoscopic Surface Perception
these interocular positional shifts and discovering howBarton L. Anderson*
Department of Brain and Cognitive Sciences these local signals are integrated into a coherent repre-
sentation of surface structure.Massachusetts Institute of Technology
Cambridge, Massachusetts 02139 Here, a series of novel stereoscopic phenomena are
presented that demonstrate a striking dissociation be-
tween the pattern of positional signals specified by
binocular disparity and perceived surface structure.Summary
These phenomena show that stereoscopic mechanisms
do much more than simply provide information aboutPhysiological, computational, and psychophysical
studies of stereopsis have assumed that the perceived depth. Indeed, it is shown that dramatic transformations
in perceived lightness, depth, and opacity can be in-surface structure of binocularly viewed images is pri-
marily specified by the pattern of binocular disparities duced without any concomitant changes in the posi-
tional signals generated by the binocular disparitiesin the two eyes' views. A novel set of stereoscopic
phenomena are reported that demonstrate the insuffi- present in the two eyes. To explain these findings, a
novel theoretical framework is introduced that articu-ciency of this view. It is shown that the visual system
computes the contrast relationships along depth dis- lates principles utilized by the visual system to infer
surface properties from binocular image data. More spe-continuities to infer the depth, lightness, and opacity of
stereoscopically viewed surfaces. A novel theoretical cifically, it is argued that the visual system contains


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


Collections: Biology and Medicine