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A psychoneural model of visual contrast
Author(s) -
Hirsch Henry R.,
Gibson John M.
Publication year - 1975
Publication title -
journal of neuroscience research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.72
H-Index - 160
eISSN - 1097-4547
pISSN - 0360-4012
DOI - 10.1002/jnr.490010509
Subject(s) - brightness , luminance , contrast (vision) , stimulus (psychology) , artificial intelligence , optics , perception , physics , computer vision , computer science , mathematics , psychology , neuroscience , psychotherapist
A typical set of visual contrast data can be described by a function which relates brightness responses to the luminance stimulus provided by a target that is viewed against an illuminated surround. This brightness‐luminance function is represented by a psychoneural visual‐contrast model having two channels, one corresponding to the brightness of the target and the other to the brightness of the surround. The principal ascending and descending pathways in each channel are represented by a submodel which is equivalent to the intensity‐perception model described by MacKay. The interaction between the channels, which accounts for the perception of contrast, takes the form of nonlinear lateral inhibition. Brightness responses calculated with the use of the pshychoneural contrast model correspond very closely to the data upon which the brightness‐luminance function is based.