RGB-LED光源下光源色度对颜色恒常性的影响

Influence of Illuminant Chromaticity on Color Constancy Under RGB-LED Light Source

基于视觉心理物理学实验研究RGB-LED光源下的颜色恒常性。实验中,观察者分别在白色和红、绿、蓝、黄4种彩色的RGB-LED光源下对240个孟塞尔(Munsell)色卡进行颜色分类。实验结果表明,从白光变化到红色和绿色光源时,颜色恒常性在各颜色类别上表现均较好,与传统宽带光源下的表现接近;变化到蓝色光源时,颜色恒常性在棕、红、黄和橙色类别上表现较差;变化到黄色光源时,颜色恒常性在棕、红和橙色类别上表现较差。总体来说,红色和绿色光源下的颜色恒常性比蓝色和黄色光源下的恒常性好。实验结果可为RGB-LED光源在实际中的设计和应用提供参考。

This study mainly investigates color constancy under RGB-LED light sources by visual psychophysics experiments.In the experiment,the subject is instructed to classify 240 Munsell surfaces under the neutral and four chromatic(red,green,blue,and yellow)illuminants produced by a RGB-LED lamp.The experimental results show that color constancy for each color category is relatively good when the light changes from the neutral to red and green,which is close to that of traditional broadband illuminants;color constancy for brown,red,yellow,and orange categories is bad when the light changes from the neutral to blue;color constancy for brown,red,and orange categories is bad when the light changes from the neutral to yellow.Overall,the color constancy under red and green illuminants is better than that under blue and yellow illuminants.These results can provide a reference for the design and application of RGB-LED light sources in practice.