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Color‐vision variations represented in an individual‐difference vector chart
Author(s) -
Paramei Galina V.,
Bimler David L.,
Cavonius C. Richard
Publication year - 2000
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 - 10.1002/1520-6378(2001)26:1+<::aid-col49>3.0.co;2-z
Subject(s) - chart , artificial intelligence , computer vision , computer science , color difference , color vision , mathematics , pattern recognition (psychology) , statistics , enhanced data rates for gsm evolution
The aim was to reconstruct a uniform color space that could accommodate normal and abnormal variations in color vision. Color‐dissimilarity data were collected from normal trichromats and red‐green deficients, using lights varying in spectral composition and luminance. The data were analyzed with an individual‐differences multidimensional scaling program and resulted in a 3D group configuration. In addition, differences in saturation required a hemispherical representation for the “color plane,” with a 4 th dimension obtained when a constraint of sphericity was included in the algorithm. Subject‐specific color spaces were derived from this group configuration by axial compression, preceded by a rotation of the chromatic plane. In the spaces of color deficients, compression along a red‐green axis occurred, though the direction of the compression differed for protans and deutans. The extent of the compression reflected the severity of abnormality. Transformations of the subject‐specific color spaces — compression extent and the angle of rotation — were portrayed in a polar‐coordinate chart. The chart separates normal trichromats from the red‐green deficients, distinguishes protans from deutans, and quantifies the deficiency within each class. © 2000 John Wiley & Sons, Inc. Col Res Appl, 26, S230–S234, 2001