Document Detail

A bidimensional theory of achromatic color vision.
MedLine Citation:
PMID:  1304088     Owner:  NLM     Status:  MEDLINE    
The theory is based on a perceptive color system where the achromatic colors are specified by their degree of similarity to the three qualities white, black and luminous. Black and luminous are treated as opponent variables. It is assumed that white and luminous/black are determined by different kinds of visual processes termed the w- and the b-process. The relationship between these processes and luminance parameters in a simple disc/ring configuration is derived from available data. The b-process is related to stimulus contrast in a simple manner. It is assumed to involve cells with antagonistic center/surround organization of the receptive field. The w-process is primarily determined by the local luminance, and it is assumed to involve cells that lack a center/surround organization of the receptive field. The w-process has properties similar to the processes involved in chromatic color vision. The theory can account for different kinds of psychophysical data on achromatic colors like data on simultaneous contrast, color scaling, and color constancy.
P Heggelund
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Vision research     Volume:  32     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  1992 Nov 
Date Detail:
Created Date:  1993-06-30     Completed Date:  1993-06-30     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  2107-19     Citation Subset:  IM    
Institute of Neurophysiology, University of Oslo, Norway.
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MeSH Terms
Color Perception / physiology*
Contrast Sensitivity / physiology
Models, Biological*

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