Document Detail

Lightness constancy: a direct test of the illumination-estimation hypothesis.
MedLine Citation:
PMID:  11933998     Owner:  NLM     Status:  MEDLINE    
Many models of color constancy assume that the visual system estimates the scene illuminant and uses this estimate to determine an object's color appearance. A version of this illumination-estimation hypothesis, in which the illuminant estimate is associated with the explicitly perceived illuminant, was tested. Observers made appearance matches between two experimental chambers. Observers adjusted the illumination in one chamber to match that in the other and then adjusted a test patch in one chamber to match the surface lightness of a patch in the other. The illumination-estimation hypothesis, as formulated here, predicted that after both matches the luminances of the light reflected from the test patches would be identical. The data contradict this prediction. A second experiment showed that manipulating the immediate surround of a test patch can affect perceived lightness without affecting perceived illumination. This finding also falsifies the illumination-estimation hypothesis.
M D Rutherford; D H Brainard
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Psychological science     Volume:  13     ISSN:  0956-7976     ISO Abbreviation:  Psychol Sci     Publication Date:  2002 Mar 
Date Detail:
Created Date:  2002-04-05     Completed Date:  2002-10-29     Revised Date:  2011-05-20    
Medline Journal Info:
Nlm Unique ID:  9007542     Medline TA:  Psychol Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  142-9     Citation Subset:  IM    
University of California, Santa Barbara, USA.
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MeSH Terms
Contrast Sensitivity*
Discrimination Learning*
Grant Support

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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