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CIE Color-Rendering Index

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Encyclopedia of Color Science and Technology

Definition

Color rendering (of a light source):

effect of an illuminant on the color appearance of objects by conscious or subconscious comparison with their color appearance under a reference illuminant [1, 2]

Color rendering index :

measure of the degree to which the psychophysical color of an object illuminated by the test illuminant conforms to that of the same object illuminated by the reference illuminant, suitable allowance having been made for the state of chromatic adaptation

Abbreviation: CRI

CIE 1974 special color rendering index [R i]:

measure of the degree to which the psychophysical color of a CIE test color sample illuminated by the test illuminant conforms to that of the same sample illuminated by the reference illuminant, suitable allowance having been made for the state of chromatic adaptation

CIE 1974 general color rendering index [R a]:

mean of the CIE 1974 special color rendering indices for a specified set of eight test color samples

Overview

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References

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Schanda, J. (2015). CIE Color-Rendering Index. In: Luo, R. (eds) Encyclopedia of Color Science and Technology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-27851-8_2-1

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  • DOI: https://doi.org/10.1007/978-3-642-27851-8_2-1

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