色度学(Colorimetry),又名比色法,是量化和物理上描述人们颜色知觉的科学和技术。 色度学同光谱学(spectrophotometry)相近,但是色度学更关心的是于人们颜色知觉物理相关的光谱。最常用的是CIE1931色彩空间和相关的数值。


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