Document Detail

Surround articulation. II. Lightness judgments.
MedLine Citation:
PMID:  10192959     Owner:  NLM     Status:  MEDLINE    
It has been hypothesized that to achieve color constancy, lightness judgments require an estimate of the illuminant. A companion paper [J. Opt. Soc. Am. A 16, 793 (1999)] suggests that surround articulation enhances the likelihood that a global luminance edge will be interpreted as being due to changes in illumination rather than in reflectance. Articulation is the process of adding equally spaced incremental and decremental patches within a surround while preserving the surround's space-average luminance. Such a process results in lightness judgments that correlate perfectly with equal local ratio matches. For decrements, lightness constancy does not require articulation. These findings help explain why Arend and Goldstein [J. Opt. Soc. Am. A 4, 2281 (1987)] obtained color constancy with complex Mondrian surrounds but not with simple center surrounds.
J A Schirillo
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Journal of the Optical Society of America. A, Optics, image science, and vision     Volume:  16     ISSN:  1084-7529     ISO Abbreviation:  J Opt Soc Am A Opt Image Sci Vis     Publication Date:  1999 Apr 
Date Detail:
Created Date:  1999-04-20     Completed Date:  1999-04-20     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:  804-11     Citation Subset:  IM    
Department of Psychology, Wake Forest University, Winston-Salem, North Carolina 27109, USA.
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MeSH Terms
Contrast Sensitivity / physiology*
Photic Stimulation / methods

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

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