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A New Look at the Calculation of Tristimulus Values
Author(s) -
Stearns E. I.
Publication year - 1981
Publication title -
color research and application
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.393
H-Index - 62
eISSN - 1520-6378
pISSN - 0361-2317
DOI - 10.1002/col.5080060404
Subject(s) - radiance , interpolation (computer graphics) , interval (graph theory) , mathematics , curve fitting , mathematical analysis , optics , statistics , computer science , physics , artificial intelligence , combinatorics , motion (physics)
Abstract The method of calculating tristimulus values currently recommended by the International Commission on Illumination (CIE) consists of summing, over the visible region, terms which involve an approximation over the wavelength interval 1, 5, or 10 nm for which data from standard tables are multiplied by measured spectral radiance factors. It is suggested that this approximation be carried out by integration. Integration can be carried out if the standard data are considered as points on a curve subject to interpolation between listed values and if the spectral radiance factor can be determined by interpolation between measured values. Adoption of this suggestion would lead to more accurate determination of tristimulus values and improved agreement among laboratories.