Confusion points and constant-luminance planes for trichromats, protanopes and deuteranopes.
The confusion points of dichromats are derived from the constant-luminance planes of trichromats, protanopes and deuteranopes experimentally defined by heterochromatic-flicker photometry: (1) the zero-luminance planes of the observers considered in this experiment intersect almost exactly in a line that crosses the plane of the chromaticity diagram in the tritanopic-confusion point and confirm that the short-wavelength sensitive cones can be considered to have no contribution to luminance; (2) protanopic- and deuteranopic-confusion points are taken as being defined by the intersection of the tangent line to the long-wavelength region of the spectrum locus and the zero-luminance plane for protanopes and deuteranopes, respectively.
Oleari
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Physics Department (INFM-GNEQP), University of Parma, Italy. oleari@fisica.unipr.it
Baratta
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Lamedica
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Macaluso
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D000221:Adaptation, Ocular; D003117:Color Vision Defects / Q000503:physiopathology*; D006801:Humans; D008433:Mathematics; D010783:Photometry; D017949:Retinal Cone Photoreceptor Cells / Q000502:physiology