color preference index (of a light source)

[ ] R_{p}

A measure for appraising a light source with respect to its ability to enhance the appearance of an object or objects by making their colors tend toward people’s preferences. Judd’s “Flattery Index” is an example.*


* Jerome CW. The flattery index.” Journal of the Illuminating Engineering Society. Jul 1973;2(4):351; and Judd DB. A flattery index for artificial illuminants. Illuminating Engineering. 1967;62(10):593.

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