International Standard
ISO 18314-4:2024
Analytical colorimetry — Part 4: Metamerism index for pairs of samples for change of illuminant
Reference number
ISO 18314-4:2024
Версия 2
2024-01
International Standard
Предпросмотр
ISO 18314-4:2024
85116
недоступно на русском языке
Опубликовано (Версия 2, 2024)

ISO 18314-4:2024

ISO 18314-4:2024
85116
Язык
Формат
CHF 129
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Тезис

This document specifies a formalism for the calculation of the illuminant metamerism of solid surface colours. It cannot be applied to colours of effect coatings without metrical adaptation.

This document only covers the phenomenon of metamerism for change of illuminant, which has the greatest meaning in practical application. In the case where chromaticity coordinates of a pair of samples under reference conditions do not exactly match, this document gives guidance on which correction measures to take. Regarding the reproduction of colours, the metamerism index is used as a measure of quality in order to specify tolerances for colour differences between a colour sample and a colour match under different illumination conditions.

The quantification of the illuminant metamerism of pairs of samples is formally performed by a colour difference assessment, for which tolerances that are common for the evaluation of residual colour differences can be used.

NOTE       In the colorimetric literature and textbooks, the term geometric metamerism is sometimes used for the case where two colours appear to be the same under a specific geometry for visual assessment and selected standard observer and standard illuminant pair, but are perceived as two different colours at changed observation geometry. The term geometric metamerism is different to metamerism described in this document.

Общая информация

  •  : Опубликовано
     : 2024-01
    : Опубликование международного стандарта [60.60]
  •  : 2
  • ISO/TC 256
    87.060.10 
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