ABSTRACT
We propose a new color rendering index based on categorical color name rather than color difference.
Subjects were asked to sort 292 Munsell color samples under 14 separate illuminants into eleven basic colors.
The distributions of color category in the Munsell Color Space were different from one illumination to another.
In order to quantify the category overlap for two different illumination conditions, an evaluation method for the categorical color rendering was development.
Assuming the D65 fluorescent illumination as a reference illuminant, the comparison was made between the condition of the D65 fluorescent illumination and each other 13 illumination condition.
The order from best to worst rate by the index of categorical color rendering does not completely agree with the general color rendering index.
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