Document Detail

Chromatic detection and discrimination analyzed by a Bayesian classifier.
MedLine Citation:
PMID:  11248275     Owner:  NLM     Status:  MEDLINE    
Detection and threshold-level discrimination of Gabor patches were studied under the conditions of noise masking, in an attempt to isolate 'higher-order' or nonclassical color mechanisms. Detection contours in the equiluminant plane of cone contrast space were measured by varying test chromaticity in the presence of chromatic masking noise. Three equiluminant noise directions were used, in separate experiments. In the discrimination experiment, observers had to discriminate between pairs of stimuli that were fixed at their masked threshold contrasts. A Bayesian color classifier model was used to analyze the discrimination data, with no free parameters. There was no evidence of nonclassical color mechanisms in either the detection or discrimination data.
R T Eskew; J R Newton; F Giulianini
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Vision research     Volume:  41     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  2001 Mar 
Date Detail:
Created Date:  2001-03-15     Completed Date:  2001-06-07     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  England    
Other Details:
Languages:  eng     Pagination:  893-909     Citation Subset:  IM    
Department of Psychology, Northeastern University, 125-NI, Boston, MA 02115, USA.
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MeSH Terms
Bayes Theorem*
Color Perception / physiology*
Differential Threshold
Discrimination (Psychology) / physiology*
Perceptual Masking / physiology
Grant Support

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