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The transformation from cone to channel sensitivities
Author(s) -
Ingling Carl R.
Publication year - 1982
Publication title -
color research and application
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.393
H-Index - 62
eISSN - 1520-6378
pISSN - 0361-2317
DOI - 10.1002/col.5080070229
Subject(s) - achromatic lens , hue , channel (broadcasting) , transformation (genetics) , mathematics , stimulus (psychology) , cone (formal languages) , physics , spatial frequency , optics , mathematical analysis , geometry , computer science , algorithm , telecommunications , psychology , chemistry , biochemistry , psychotherapist , gene
Zone theories of color vision transform R, G, B cone signals to a set of summing and differencing channels. Although the general principles of this transformation are well known, there are subtleties in the transformation which are not well understood. For example: (i) The r–g channel sends two kinds of signal, depending on the spatial frequencies of the stimulus. It sends a difference or hue signal at low spatial frequencies and an additive or achromatic signal in response to high spatial frequencies. (ii) The B ‐cone contribution to the r–g channel is greater by a factor of 10 for desaturated stimuli. A quantitative saturation‐dependent mechanism can account for the B ‐cone input to the r–g channel.