Document Detail

Color and luminance in the perception of 1- and 2-dimensional motion.
MedLine Citation:
PMID:  10492826     Owner:  NLM     Status:  MEDLINE    
An isoluminant color grating usually appears to move more slowly than a luminance grating that has the same physical speed. Yet a grating defined by both color and luminance is seen as perceptually unified and moving at a single intermediate speed. In experiments measuring perceived speed and direction, it was found that color- and luminance-based motion signals are combined differently in the perception of 1-D motion than they are in the perception of 2-D motion. Adding color to a moving 1-D luminance pattern, a grating, slows its perceived speed. Adding color to a moving 2-D luminance pattern, a plaid made of orthogonal gratings, leaves its perceived speed unchanged. Analogous results occur for the perception of the direction of 2-D motion. The visual system appears to discount color when analyzing the motion of luminance-bearing 2-D patterns. This strategy has adaptive advantages, making the sensing of object motion more veridical without sacrificing the ability to see motion at isoluminance.
B Farell
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Vision research     Volume:  39     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  1999 Aug 
Date Detail:
Created Date:  1999-10-04     Completed Date:  1999-10-04     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  2633-47     Citation Subset:  IM; S    
Institute for Sensory Research, Syracuse University, NY 13244-5290, USA.
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MeSH Terms
Color Perception / physiology*
Contrast Sensitivity
Depth Perception / physiology
Motion Perception / physiology*
Pattern Recognition, Visual / physiology
Time Factors
Grant Support

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