L*a*b*颜色空间在色差评估中的明度标尺均匀性
The Uniformity of Lightness Scale in L*a*b* Color Space for Color-Difference Evaluation
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摘要: 用倍率法对打印色样和ＣＲＴ模拟色样进行视觉评估实验，研究了Ｌ＾＊ａ＾＊ｂ＾＊颜色空间在用于色差评估时明度标尺的均匀性。视觉实验的数据处理结果表明，Ｌ＾＊ａ＾＊ｂ＾＊空间的明度差几乎没有依赖于明度而呈一定变化趋势的特性，因此在ＣＩＥ９４色差公式中的明度权重函数的原始取值为１。Abstract: The printed color samples and CRT simulated color samples were assessed using ratio method to investigate the uniformity of the lightness scale in L *a *b * color space used for color difference evaluation. Lightness dependence was not found in L *a *b * color space. It is reasonable that weighting function for lightness difference in CIE94 color difference model was proposed to be 1.
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