Document Detail


Parallel detection of violations of color constancy.
MedLine Citation:
PMID:  11438751     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The perceived colors of reflecting surfaces generally remain stable despite changes in the spectrum of the illuminating light. This color constancy can be measured operationally by asking observers to distinguish illuminant changes on a scene from changes in the reflecting properties of the surfaces comprising it. It is shown here that during fast illuminant changes, simultaneous changes in spectral reflectance of one or more surfaces in an array of other surfaces can be readily detected almost independent of the numbers of surfaces, suggesting a preattentive, spatially parallel process. This process, which is perfect over a spatial window delimited by the anatomical fovea, may form an early input to a multistage analysis of surface color, providing the visual system with information about a rapidly changing world in advance of the generation of a more elaborate and stable perceptual representation.
Authors:
D H Foster; S M Nascimento; K Amano; L Arend; K J Linnell; J L Nieves; S Plet; J S Foster
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Proceedings of the National Academy of Sciences of the United States of America     Volume:  98     ISSN:  0027-8424     ISO Abbreviation:  Proc. Natl. Acad. Sci. U.S.A.     Publication Date:  2001 Jul 
Date Detail:
Created Date:  2001-07-04     Completed Date:  2001-08-09     Revised Date:  2013-06-09    
Medline Journal Info:
Nlm Unique ID:  7505876     Medline TA:  Proc Natl Acad Sci U S A     Country:  United States    
Other Details:
Languages:  eng     Pagination:  8151-6     Citation Subset:  IM    
Affiliation:
Visual and Computational Neuroscience Group, Department of Optometry and Neuroscience, University of Manchester Institute of Science and Technology, Manchester M60 1QD, United Kingdom. d.h.foster@umist.ac.uk
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MeSH Terms
Descriptor/Qualifier:
Color Perception*
Humans
Light
Lighting
Models, Theoretical*
Comments/Corrections

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