| Projected disparity, not horizontal disparity, predicts stereo depth of 1-D patterns. | |
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MedLine Citation:
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PMID: 19540869 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Binocular disparities have a straightforward geometric relation to object depth, but the computation that humans use to turn disparity signals into depth percepts is neither straightforward nor well understood. One seemingly solid result, which came out of Wheatstone's work in the 1830s, is that the sign and magnitude of horizontal disparity predict the perceived depth of an object: 'positive' horizontal disparities yield the perception of 'far' depth, 'negative' horizontal disparities yield the perception of 'near' depth, and variations in the magnitude of horizontal disparity monotonically increase or decrease the perceived extent of depth. Here we show that this classic link between horizontal disparity and the perception of 'near' versus 'far' breaks down when the stimuli are one-dimensional. For these stimuli, horizontal is not a privileged disparity direction. Instead of relying on horizontal disparities to determine their depth relative to that of two-dimensional stimuli, the visual system uses a disparity calculation that is non-veridical yet well suited to deal with the joint coding of disparity and orientation. |
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Authors:
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Bart Farell; Yu-Chin Chai; Julian M Fernandez |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural Date: 2009-06-21 |
Journal Detail:
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Title: Vision research Volume: 49 ISSN: 1878-5646 ISO Abbreviation: Vision Res. Publication Date: 2009 Aug |
Date Detail:
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Created Date: 2009-08-12 Completed Date: 2009-12-14 Revised Date: 2011-02-21 |
Medline Journal Info:
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Nlm Unique ID: 0417402 Medline TA: Vision Res Country: England |
Other Details:
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Languages: eng Pagination: 2209-16 Citation Subset: IM |
Affiliation:
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Institute for Sensory Research, Syracuse University, 621 Skytop Rd., Syracuse, NY 13323-5290, USA. bfarell@syr.edu |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Depth Perception
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physiology* Humans Pattern Recognition, Visual / physiology* Photic Stimulation / methods Psychometrics Psychophysics Vision Disparity / physiology* Vision, Binocular / physiology |
| Grant Support | |
ID/Acronym/Agency:
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EYR01-012286//PHS HHS; R01 EY012286-09/EY/NEI NIH HHS |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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