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An improved quantitative description of the equidistant color and lightness spacing of the Munsell and OSA‐UCS Systems is presented. The basic idea is to apply physiologically acceptable hyperbolic response functions to relate light absorption in and the excitation of the three cone types with...
Available colour‐discrimination data for surface colours have been analysed to produce chromaticity‐discrimination ellipses for individual colour centres. Applying simulated errors showed that when the distribution of samples around a standard was unsatisfactory, the ellipses obtained were...
Color measurements were carried out in September, 1981, and again in January, 1982, on a total of 102 color zones in 12 different figures in the polychromatic roof of the Paintings Room of the Altamira Cave. The comparative study was carried out to evaluate any seasonal variations in reflectance...
The field of colorimetry appears to be arbitrarily divided into two areas, matching‐and‐formulation colorimetry and image‐reproduction colorimetry. It is believed that the end uses for the colorimetric data and the methods of color generation are sufficiently different in these two areas to...
A color order system may arrange color perceptions, color stimuli, or material color samples according to certain rules. Material color systems have many practical applications but are different for different materials and different applications. Stimulus systems are useful in comparing...
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