Abstract
The authors experimentally defined the dependences of chromaticity thresholds between an object and a background for 10 trichromatic observers. The experiments included observation of monochromatic objects with dimension of (2?2) angular degree against a white background. Based on the statistical theory of human threshold colour vision, it was proved that in the XYZ colorimetric system, the value of Y coordinate of the primary colour Mphys is positive and lies along the y=1x line. This fact allowed to define all the characteristics of a trichromatic physiological system (LMS)phys necessary for chromatic calculations.
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