Document Detail

Color appearance: effects of illuminant changes under different surface collections.
MedLine Citation:
PMID:  8120699     Owner:  NLM     Status:  MEDLINE    
A theory about how changes in the illuminant affect the color appearance of objects must specify how the visual system's adjustments to illuminant changes vary with the surface collection in a scene. I report an experiment designed to investigate this issue. The stimuli were CRT simulations of flat matte surfaces rendered under diffuse illumination. For all combinations of 7 daylight illuminants and 12 collections of surface reflectances the subject's achromatic locus was measured on an isoluminant plane in color space. For any surface collection the changes in the achromatic locus could be well approximated by a linear transformation of the illuminant changes. These linear transformations showed relatively small variation with the surface collection. To first approximation, these results suggest that the effect of changes in the illuminant on color appearance can be described linearly and that it can be separated from the surface collection. There was an effect of the surface collection on the achromatic locus. The data rejected the idea that a surface collection's mean reflectance function might capture this effect, ruling out models of color appearance that are based on this kind of averaging assumption.
K H Bäuml
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of the Optical Society of America. A, Optics, image science, and vision     Volume:  11     ISSN:  1084-7529     ISO Abbreviation:  J Opt Soc Am A Opt Image Sci Vis     Publication Date:  1994 Feb 
Date Detail:
Created Date:  1994-04-04     Completed Date:  1994-04-04     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9800943     Medline TA:  J Opt Soc Am A Opt Image Sci Vis     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  531-42     Citation Subset:  IM    
Institut für Psychologie, Universität Regensburg, Germany.
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MeSH Terms
Color Perception / physiology*
Computer Simulation
Photic Stimulation
Surface Properties

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

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