基于脑电波信号的色差评价研究

The Study of Color-difference Evaluation Based on EEG Signals

组织10名色觉正常、生理和心理健康、年龄和教育背景相近的观察者进行心理物理实验.通过记录和分析观察者观察不同颜色、不同色差大小刺激的32个电极上的脑电波数据,探讨了CIELAB颜色空间中红、绿、蓝、灰四种颜色、大小分别为10和5的两组色差刺激产生的事件相关电位(ERP)的区别.实验结果表明,在注视色差刺激时,脑部右侧和枕区N1成分呈现明显的规律性,N1电位从脑前到脑后逐渐减小、振幅逐渐增大,且色差越大N1电位越大(振幅越小);而P3成分在脑部中线区域比其他区域较有规律,但其规律性比N1成分弱.

It is recorded in this paper that 10 observers with normal color vision, good physical and mental health, similar ages and education backgrounds are organized to conduct a psychophysical experiment. By recording and analyzing the EEG signal on 32 electrodes produced by observers who try to distinguish color-difference stimulus with different color-difference magnitudes and different colors, the differences of event-related potentials(ERP) among two groups of color-difference stimulus with the color-difference in CIELAB color space is 10 and 5 are investigated in this paper, each group has red, green, blue and gray color-difference stimulus. The experimental results show that N1 components(or N100) in the right-side and occipital region of brain have obvious regularity when observers are gazing at color-difference stimulus. The potentials of N1 decrease gradually from the frontal to the parietal and contrary to the amplitudes. Moreover,the larger the color-difference, the greater the potential(the smaller the amplitude). P3(or P300) components in the midline region of brain are more regular than that in other regions, but their regularity are weaker than that of N1.