颜色视觉匹配中显示器颜色色差阈值的评价

Cathode-Ray Tube Color Perceptible Color Difference Threshold Evaluation in Visual Color Matching

为了对阴极射线管(Cathode ray tube,CRT)显示器颜色恰可辨别的小色差阈值进行评价,在中性灰背景下,用编制的颜色匹配程序,在CRT显示器上随机产生颜色,分别调节程序中R、G、B通道的值,使匹配色与随机色达到视觉上的一致,进行颜色视觉匹配实验,测量CRT显示器上随机色和匹配色的L*a*b*值。用不同的色差公式对实验数据分别从明度、色调、饱和度进行比较分析,色差公式评价小色差的性能是CIEDE2000优于CMC(2∶1)和CIEL*a*b*。在a*b*图上绘制实验颜色恰可辨别图。不同色差公式计算的CRT显示器恰可辨别小色差阈值不同。

For the evaluation of cathode-ray tube （CRT）perceptible color difference threshold characteristics of the visual color matching, the experiment is carried out. By using the compiled color-matching program, the CRT generates color under gray background randomly. The matching color and the random color can achieve visual color matching by adjusting the R, G and B channels in the program, then the values of L^＊a^＊b^＊ of the matching color and the random color are measured respectively. Upon the data processing and analysis of the experimental results, in terms of lightness, chroma and hue, the color difference formula CIEDE2000 is superior to CMC （2：1 ） and CIE L^＊a^＊b^＊ in different aspects. Then experimental color discrimination are plotted in a^＊b^＊ diagram. Furthermore, different color difference formulae have different thresholds for evaluating CRT perceptible color difference threshold.