ISO 18314-4:2024 分析比色法 第4部分：光源变化用成对样品的同色异谱指数

标准编号：ISO 18314-4:2024

中文名称：分析比色法 第4部分：光源变化用成对样品的同色异谱指数

英文名称：Analytical colorimetry — Part 4: Metamerism index for pairs of samples for change of illuminant

发布日期：2024-01

标准范围

本文件规定了计算固体表面颜色的发光同色异谱的形式。没有度量适应，它不能应用于效果涂料的颜色。本文仅涉及光源变化的同色异谱现象，这在实际应用中具有最大意义。在参考条件下的一对样品的色度坐标不完全匹配的情况下，本文档给出了采取何种校正措施的指导。关于颜色的再现，同色异谱指数被用作质量的量度，以便指定在不同照明条件下颜色样品和颜色匹配之间的色差的容差。成对样品的发光体同色异谱的定量正式通过色差评估进行，对于该色差评估，可以使用用于评估残余色差的常见公差。笔记？在色度学文献和教科书中，术语几何同色异谱有时用于以下情况:两种颜色在用于视觉评估的特定几何形状和选定的标准观察者和标准光源对下看起来相同，但在改变的观察几何形状下被感知为两种不同的颜色。术语几何同色异谱不同于本文所述的同色异谱。

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.

标准预览图