Document Detail

Depth discrimination of a crowded line is better when it is more luminant than the lines crowding it.
MedLine Citation:
PMID:  7900304     Owner:  NLM     Status:  MEDLINE    
Observers usually cannot discriminate the relative depth of a crowded feature with respect to crowding features about 2 arc min distant if all the features have the same luminance. However, stereo thresholds significantly less than 20 arc sec are obtained when the crowded feature is about twice as luminant as the features crowding it. The thresholds depend only upon the ratio of the luminance of the target feature to the luminance of the crowding features and are independent of the absolute luminance of the features. With further increase in the relative luminance of the target feature, the performance eventually deteriorates and this deterioration is not due to difficulty in seeing the features which were individually clearly visible for all the luminances tested. The closest spacing of local crowded features that still allows good stereo discrimination is about the same as the spatial resolution attainable for many luminance-based non-stereo tasks.
T Kumar; D A Glaser
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Vision research     Volume:  35     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  1995 Mar 
Date Detail:
Created Date:  1995-04-24     Completed Date:  1995-04-24     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  657-66     Citation Subset:  IM; S    
Department of Molecular and Cell Biology, University of California, Berkeley 94720.
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MeSH Terms
Depth Perception / physiology*
Discrimination (Psychology)
Sensory Thresholds / physiology
Vision Disparity / physiology*
Vision, Binocular / physiology

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