Document Detail


Difference scaling of gloss: nonlinearity, binocularity, and constancy.
MedLine Citation:
PMID:  15493965     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Gloss is an attribute of visual appearance that originates from the geometrical distribution of the light reflected by the surface. We used the maximum likelihood difference scaling (MLDS) procedure (L.T. Maloney & J. N. Yang, 2003) to estimate gloss scales over an extended range. Observers' judgments were obtained for a series of 10 black, coated samples for two directions of illumination, in binocular and monocular vision. The results showed a nonlinear relation between gloss percept and instrumental specular gloss values. Sensitivity is higher at extreme scale values than in the middle. In binocular vision, the sensitivity to gloss is higher than in monocular vision exclusively for high gloss levels. Lastly, we found that gloss difference scales, when expressed in terms of the samples rather than the photometric characteristics, vary little with the direction of illumination. Gloss scaling thus seems to be independent of the geometrical variations of the luminous flux at the surface of the sample. By analogy with the term "color constancy," we call this property "gloss constancy."
Authors:
Gaël Obein; Kenneth Knoblauch; Françoise Viénot
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2004-08-30
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:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  101147197     Medline TA:  J Vis     Country:  United States    
Other Details:
Languages:  eng     Pagination:  711-20     Citation Subset:  IM    
Affiliation:
Centre de Recherches sur la Conservation des Documents Graphiques, CNRS FRE 2743 - Muséum National d'Histoire Naturelle, Paris, France. obein@mnhn.fr
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MeSH Terms
Descriptor/Qualifier:
Humans
Light*
Lighting
Ocular Physiological Phenomena
Vision, Binocular / physiology*
Visual Perception / physiology*

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


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