Document Detail


Mechanisms of color constancy under nearly natural viewing.
MedLine Citation:
PMID:  9874814     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Color constancy is our ability to perceive constant surface colors despite changes in illumination. Although color constancy has been studied extensively, its mechanisms are still largely unknown. Three classic hypotheses are that constancy is mediated by local adaptation, by adaptation to the spatial mean of the image, or by adaptation to the most intense image region. We measure color constancy under nearly natural viewing conditions, by using a design that allows us to test these three hypotheses directly. By suitable stimulus manipulation, we are able to titrate the degree of constancy between 11% and 83%, indicating that we have achieved good laboratory control. Our results rule out all three classic hypotheses and thus suggest that there is more to constancy than can be easily explained by the action of simple visual mechanisms.
Authors:
J M Kraft; D H Brainard
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Proceedings of the National Academy of Sciences of the United States of America     Volume:  96     ISSN:  0027-8424     ISO Abbreviation:  Proc. Natl. Acad. Sci. U.S.A.     Publication Date:  1999 Jan 
Date Detail:
Created Date:  1999-03-01     Completed Date:  1999-03-01     Revised Date:  2013-04-16    
Medline Journal Info:
Nlm Unique ID:  7505876     Medline TA:  Proc Natl Acad Sci U S A     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  307-12     Citation Subset:  IM    
Affiliation:
Department of Psychology, University of California, Santa Barbara, CA 93106, USA.
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MeSH Terms
Descriptor/Qualifier:
Adaptation, Biological
Adult
Color Perception*
Color Perception Tests
Female
Humans
Light
Male
Models, Biological
Grant Support
ID/Acronym/Agency:
EY06745/EY/NEI NIH HHS; EY10016/EY/NEI NIH HHS
Comments/Corrections

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