Document Detail

Color measurement and discrimination.
MedLine Citation:
PMID:  3968600     Owner:  NLM     Status:  MEDLINE    
Theories of color-difference measurement provide a quantitative means for predicting whether two lights will be discriminable to an average observer. Consider the following color-measurement hypothesis. Suppose that two lights evoke responses from the color channels that we write as vectors, U and U'. The vector difference dU = U - U' is itself a set of channel responses that will result from the presentation of some light. I test the hypothesis that U and U' will be discriminable only if the light that gives rise to their differential, dU, is detectable. In the absence of a luminance component in the difference stimulus, dU, the vector-difference hypothesis holds well. In the presence of a luminance component, the theory is clearly false. When a luminance component is present, discrimination judgements depend largely on whether the lights U and U' are in separate, categorical regions of color space.
B A Wandell
Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of the Optical Society of America. A, Optics and image science     Volume:  2     ISSN:  0740-3232     ISO Abbreviation:  J Opt Soc Am A     Publication Date:  1985 Jan 
Date Detail:
Created Date:  1985-03-05     Completed Date:  1985-03-05     Revised Date:  2009-11-19    
Medline Journal Info:
Nlm Unique ID:  8402086     Medline TA:  J Opt Soc Am A     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  62-71     Citation Subset:  IM    
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MeSH Terms
Biofeedback, Psychology
Color Perception*
Color Perception Tests
Photic Stimulation
Sensory Thresholds
Grant Support

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

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