Document Detail

Binocular correlation detection with oriented dynamic random-line stereograms.
MedLine Citation:
PMID:  8776495     Owner:  NLM     Status:  MEDLINE    
Stereopsis relies principally on the extraction of horizontal retinal disparities. As such, we assume that the vertical contours (i.e., horizontal contrast energy) are of principle import for stereopsis. Yet there are theoretical reasons for believing that horizontal contours should be involved in binocular matching (if not stereopsis proper) as well. First, they would facilitate the computation of vertical disparities, which are necessary for the control of disjunctive eye movements and perhaps the computation of absolute depth. Second, the process of binocular matching is a two-dimensional one; its solution requires information along both principle orientations. In this study, we have measured the efficacy with which horizontal or vertical contours can be binocularly matched by measuring thresholds for the detection of interocular correlation for oriented dynamic random-line stereograms. We find that the slopes of the psychometric functions are almost a factor of two steeper when matching vertical contours, indicating a narrower noise distribution along the decision axis associated with these stimuli.
L K Cormack; R B Riddle
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Vision research     Volume:  36     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  1996 Aug 
Date Detail:
Created Date:  1996-10-24     Completed Date:  1996-10-24     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  2303-10     Citation Subset:  IM    
Department of Psychology and Center for Vision and Image Sciences, University of Texas at Austin 78701, USA.
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MeSH Terms
Fixation, Ocular
Pattern Recognition, Visual / physiology*
Sensory Thresholds / physiology
Vision Disparity / physiology*
Vision, Binocular / physiology*
Grant Support

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