Document Detail


Illuminant color perception of spectrally filtered spotlights.
MedLine Citation:
PMID:  15493963     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The color perceived to belong to the illumination of objects is often based on cues from the scene within which the objects are perceived, instead of being based on any view of the source itself. We present measurements of illuminant color estimation by human observers for moving, spectrally filtered spotlights. The results show that when only one illuminant is in the field of view, estimates of illuminant color are seriously biased by the chromaticities of the illuminated surfaces. When the surround of the spotlight is illuminated by a dimmer second light, spotlight matching moves toward veridical in most conditions. Simulations show that a gray-world model cannot be rejected as an adequate explanation for illuminant color estimation and provides as good a fit as a model that gives greater weights to the brightest surfaces. When the surrounding illuminant is brighter than the spotlight, the situation is similar to that of a moving filter. Spotlight matches are close to veridical, and the results can be fit by a model based on estimating both illuminants.
Authors:
Byung-Geun Khang; Qasim Zaidi
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.     Date:  2004-08-24
Journal Detail:
Title:  Journal of vision     Volume:  4     ISSN:  1534-7362     ISO Abbreviation:  J Vis     Publication Date:  2004 Aug 
Date Detail:
Created Date:  2004-10-20     Completed Date:  2004-12-16     Revised Date:  2008-04-29    
Medline Journal Info:
Nlm Unique ID:  101147197     Medline TA:  J Vis     Country:  United States    
Other Details:
Languages:  eng     Pagination:  680-92     Citation Subset:  IM    
Affiliation:
Helmholtz Institute, Utrecht University, Utrecht, The Netherlands. b.g.khang@phys.uu.nl
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MeSH Terms
Descriptor/Qualifier:
Color Perception / physiology*
Humans
Light
Lighting*
Mathematics
Motion Perception / physiology*
Grant Support
ID/Acronym/Agency:
EY07556/EY/NEI NIH HHS

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


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