Document Detail

Three-dimensional shape perception from chromatic orientation flows.
MedLine Citation:
PMID:  16961963     Owner:  NLM     Status:  MEDLINE    
The role of chromatic information in 3-D shape perception is controversial. We resolve this controversy by showing that chromatic orientation flows are sufficient for accurate perception of 3-D shape. Chromatic flows required less cone contrast to convey shape than did achromatic flows, thus ruling out luminance artifacts as a problem. Luminance artifacts were also ruled out by a protanope's inability to see 3-D shape from chromatic flows. Since chromatic orientation flows can only be extracted from retinal images by neurons that are responsive to color modulations and selective for orientation, the psychophysical results also resolve the controversy over the existence of such neurons. In addition, we show that identification of 3-D shapes from chromatic flows can be masked by luminance modulations, indicating that it is subserved by orientation-tuned neurons sensitive to both chromatic and luminance modulations.
Qasim Zaidi; Andrea Li
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, N.I.H., Extramural    
Journal Detail:
Title:  Visual neuroscience     Volume:  23     ISSN:  0952-5238     ISO Abbreviation:  Vis. Neurosci.     Publication Date:    2006 May-Aug
Date Detail:
Created Date:  2006-09-11     Completed Date:  2006-10-18     Revised Date:  2014-09-15    
Medline Journal Info:
Nlm Unique ID:  8809466     Medline TA:  Vis Neurosci     Country:  England    
Other Details:
Languages:  eng     Pagination:  323-30     Citation Subset:  IM    
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MeSH Terms
Computer Simulation
Form Perception / physiology*
Orientation / physiology*
Pattern Recognition, Visual / physiology
Photic Stimulation / methods
Psychophysics / methods
Grant Support
EY07556/EY/NEI NIH HHS; EY13312/EY/NEI NIH HHS; R01 EY007556/EY/NEI NIH HHS; R01 EY007556-13/EY/NEI NIH HHS; R01 EY007556-14/EY/NEI NIH HHS; R01 EY007556-15/EY/NEI NIH HHS; R01 EY007556-16/EY/NEI NIH HHS; R01 EY007556-17A2/EY/NEI NIH HHS; R01 EY007556-18/EY/NEI NIH HHS; R01 EY007556-19/EY/NEI NIH HHS; R01 EY007556-20/EY/NEI NIH HHS; R01 EY013312/EY/NEI NIH HHS; R01 EY013312-01/EY/NEI NIH HHS; R01 EY013312-02/EY/NEI NIH HHS; R01 EY013312-03/EY/NEI NIH HHS; R01 EY013312-04/EY/NEI NIH HHS; R01 EY013312-05/EY/NEI NIH HHS; R01 EY013312-06/EY/NEI NIH HHS; R01 EY013312-07/EY/NEI NIH HHS; R01 EY013312-08/EY/NEI NIH HHS; R01 EY013312-09/EY/NEI NIH HHS

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