天然植物花卉的反射光谱在显示器中的颜色复制特征

基于sRGB颜色空间作为显示器的色彩显示的重要颜色空间，首次对天然植物花卉反射光谱在sRGB颜色空间的复制特征进行了研究。针对天然植物花卉颜色由CIE1931XYZ向sRGB颜色空间转换过程中在sRGB空间中的“剪切”现象，分析了九种典型光源下218种天然植物花卉的反射光谱在sRGB颜色空间的颜色复制误差。考虑到D65光源的特殊性，对D65下的复制做了重点研究。研究结果表明，天然植物花卉颜色由CIE1931颜色空间向sRGB颜色空间转换时，“剪切现象”是造成空间转换误差的主要原因，存在剪切现象时，如果颜色分量剪切程度较小，同样可以不会带来大的色差，仍可能得到较好的颜色复制效果;D65光源下，218个天然植物花卉光谱中有8个“橙黄色”光谱的颜色在sRGB颜色空间中存在“剪切现象”，占总光谱数目的3.7%;D65下天然植物花卉颜色在sRGB中颜色复制效果最好，而在A光源下最差。

Reproduction Features of Reflectance Spectrum of Natural Plant Flower Color

Based on the sRGB color space as an important color space of computer display, the authors explored color reproduction features in sRGB. In the terms of ＂color clipping＂ of color space transformation from CIE1931XYZ to sRGB, the color reproduction errors in sRGB of 218 reflectance spectra of natural plant flower color were examined. Considering the importance of D65 illumination, the reproduction features of natural color under D65 were emphasized. It was concluded as follows. Firstly, ＂color clipping＂ is the key cause of color transformation error of the natural plant color when it is transformed from CIE1931XYZ to sRGB color space. Secondly, under I365 eight orange and yellow reflectance spectra in 218 natural color show clipping in sRGB color space, accounting for 3.7% of all samples. Finally, the color reproduction of natural plant flower color in sRGB under 1365 is the best, while the A illumination is the worst.