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Summary: Vision Research 41 (2001) 31333143
Effects of horizontal and vertical additive disparity noise on
stereoscopic corrugation detection
Stephen Palmisano a,
*, Robert S. Allison b,c
, Ian P. Howard c
a
Department of Psychology, Uni6ersity of Wollongong, Wollongong, New South Wales 2522, Australia
b
Department of Computer Science, York Uni6ersity, Toronto, Ontario, Canada, M3J 1P3
c
Centre for Vision Research, York Uni6ersity, Toronto, Ontario, Canada, M3J 1P3
Received 20 October 2000; received in revised form 23 April 2001
Abstract
Stereoscopic corrugation detection in the presence of horizontal- and vertical- additive disparity noise was examined using a
signal detection paradigm. Random-dot stereograms either represented a 3-D square-wave surface with various amounts of
Gaussian-distributed additive disparity noise or had the same disparity values randomly redistributed. Stereoscopic detection of
2 arcmin peak amplitude corrugations was found to tolerate significantly greater amplitudes of vertical-disparity noise than
horizontal-disparity noise--irrespective of whether the corrugations were horizontally or vertically oriented. However, this
directional difference in tolerance to disparity noise was found to reverse when the corrugation and noise amplitudes were
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