用LED原色的同色异谱样本检验不同颜色匹配函数的表现

Performances of Different Color Matching Functions Examined by Metamerism Samples of LED Primary Colors

颜色刺激的光谱组成不同,个体观察者的颜色感觉不同,用不同颜色匹配函数计算的配色精度也会存在差异。为研究自发光设备原色光谱峰值波长位置改变对这种差异的影响程度,选取了1台3通道(R1G2B1)和1台6通道(R1R2G1G2B1B2)LED发光面板,以3通道LED面板中636nm-524nm-452nm组合呈现的颜色为目标色,分别改变6通道LED面板中的RGB单通道和双通道,共产生了7种(包括1种同谱)组合。组织39名年龄分布在19~24岁的色觉正常观察者,基于7种组合开展了白色的配色实验,共采集到357组光谱数据。将CIE1964,CIE2006,基于反射色优化建立、适于年轻观察者的Sarkar2,BIGC17共4种颜色匹配函数代入计算,以CIE1976-u'v'色品参数计算的Δ(u',v')值进行评价。用CIE1964和CIE2006计算的颜色匹配精度和观察者间差异,均受红通道影响较小,与同谱组合的计算结果较为接近;其次是蓝通道,绿通道峰值波长位置改变的影响较大,与同谱组合间的差异显著。Sarkar2和BIGC17的计算性能较好,在某些组合下优于CIE1964和CIE2006。

Color stimuli with different primary colors will arouse different color perceptions,and color matching accuracies calculated by different color matching functions are also different.To investigate the influences of the peak wavelength location of primary colors from self-illuminating equipment on such differences,we selected one 3-channel LED panel(R1G2B1)and one 6-channel LED panel(R1R2G1G2B1B2).The color displayed by the 636 nm-524 nm-452 nm combination in the 3-channel LED panel was defined as the target color,and seven corresponding combinations(including one combination of the same spectrum)were generated after the RGB single channel and double channel of the 6-channel LED panel were changed.Thirty-nine observers(aged from 19 to 24)with normal color vision were organized for the color matching experiments of white color,and 357 sets of data were collected in the visual experiments.Four sets of color matching functions were employed,including CIE1964,CIE2006,Sarkar2,and BIGC17(the latter two are based on reflective color sample pairs and suitable for young observers).Their performances were evaluated withΔ(u',v')calculated by CIE1976-u'v'chromaticity.The results indicated that regarding the color matching accuracy and the observer variation calculated by CIE1964 and CIE2006,the peak wavelength positions of the red channel,blue channel,and green channel had increasing influences,and the differences from the same-spectrum combination results were also in an ascending order.Sarkar2 and BIGC17 outperformed CIE1964 and CIE2006 in some combinations.