DIN EN ISO 11664-3:2013-08

This document (EN ISO 11664-3:2013) contains the German translation of the International Standard ISO 11664-3, which has been prepared by the "International Commission on Illumination". On the European level, the responsibility is held by Technical Committee CEN/TC 139 "Paints and varnishes" (secretariat: DIN, Germany). The responsible national committee is NA 025-00-02 GA "Gemeinschaftsarbeitsausschuss FNF/FNL: Farbmetrik" ("Joint working committee FNF/FNL: Colorimetry") of the Colour Standards Committee (FNF) at DIN. Colour stimuli with different spectral distributions can look alike. An important function of colorimetry is to determine which stimuli look alike to a given observer with a given set of colour-matching functions. This is done by calculating a set of three tristimulus values for each stimulus. Equality of tristimulus values indicates equality of colour appearance under equal irradiation and viewing conditions. This Standard is based on long-standing CIE recommendations (CIE, 2004) for the calculation of tristimulus values.