基于复杂观察条件的色差公式评价

色差是印刷生产中用于控制产品颜色质量的重要参数.本文以常见色差公式CIELAB、CIE94、CIEDE2000以及基于CIECAM02色貌模型的颜色空间为基础,通过变换光源、照度等条件进行了一系列的心理物理学实验,新建了一个考虑多种观察条件的色差评价数据集XUT.利用该数据集,采用STRESS、F分布方法,对CIELAB、CIE94、CIEDE2000、CMC以及CIECAM02系列的色差公式进行了性能评价.结果表明,在不同的条件下,各个色差公式的性能有所差异,在D50、D65和TL84条件下CIEDE2000的性能都为最佳,另外,在D65条件下CIE94的表现优于CIECAM02系列色差公式.一般而言,照度太高反而影响色差公式的性能.

Evaluation on the Performance of Color-Difference Formula under Various Viewing Conditions

Color difference is a very important parameter to control the printing quality in printing production.According to the color-difference formulae and color space based on CIECAM02,the data set named XUT was established with series of psychophysical experiments under various illuminants and illuminance.The data set was used to evaluate the existing color formulae such as CIELAB,CIE94,CIEDE2000,CMC and series of color difference formulae based on CIECAM02.The evaluation methods including STRESS、F-test were used.The results showed that the performance of these color difference formulae is different.Under illuminant D₅₀,D₆₅ and TL84,CIEDE2000 is the best while CIE94 is better than series of formulae of CIECAM02 under illuminant D₆₅.In general,the formulae under appropriate illuminance are better than that under too high illuminance.