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Summary: Vision Research 40 (2000) 38233827
Stereopsis with persisting and dynamic textures
R.S. Allison *, I.P. Howard
Centre for Vision Research, York Uni6ersity, 103 Farquharson, Toronto, Ontario, Canada M3J 1P3
Received 5 May 2000; received in revised form 18 July 2000
Abstract
We measured the percept of changing depth from changing disparity in stereograms composed of random-dot textures that were
either persistent or dynamically changed on every frame (a dynamic random-dot stereogram). Disparity was changed between
frames to depict a surface undergoing smooth temporal changes in simulated slant. Matched depth was greater with dynamic
random-dot stereograms than with persistent random-dot stereograms. These results confirm and extend earlier observations at
depth threshold. We posit an explanation based on cue conflict between stereopsis and monocular depth cues. © 2000 Elsevier
Science Ltd. All rights reserved.
Keywords: Stereopsis; Cue conflict; Dynamic random-dot stereogram
www.elsevier.com/locate/visres
1. Introduction
Julesz (1971) introduced random-dot stereograms
(RDS) for the study of binocular vision, particularly
stereopsis. In a RDS, similar random-dot textures are
presented to each eye as a stereogram. Disparity can be
introduced by displacing the dots in one eye relative to
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