ISO 18314-4:2020 分析比色法 第4部分：光源变化时成对样品的异质指数

标准编号：ISO 18314-4:2020

中文名称：分析比色法 第4部分：光源变化时成对样品的异质指数

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

发布日期：2020-08

标准范围

本文件规定了计算固体表面颜色的光源同色异谱的形式。如果没有韵律调整，它不能应用于效果涂层的颜色。本文件仅涵盖因光源变化而产生的同色异谱现象，这在实际应用中具有最大意义。如果一对样品在参考条件下的色度坐标不完全匹配，则给出了采取校正措施的建议。关于颜色的复制，同色异谱指数被用作质量的衡量标准，以指定不同照明条件下颜色样本和颜色匹配之间的色差公差。通过色差评估正式对成对样品的光源同色异谱进行量化，可使用评估残余色差的常见公差。注: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:在视觉评估和选定的标准观察者和标准光源对的特定几何条件下，两种颜色似乎相同，但在改变的观察几何条件下被视为两种不同的颜色。术语几何同色异谱与本文中描述的同色异谱不同。

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 of chromaticity coordinates of a pair of samples under reference conditions that do not exactly match, recommendations are given on which correction measures are to be taken. 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 that two colours appear to be the same under a specific geometry for visual assessment and selected standard observer and standard illuminant pair, but is 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