目前CRT显示器颜色特性化的最高精度大约是0．5AE^*ab。一些在CRT上进行颜色和图像视觉评价的实验要求在颜色中心小范围内能更精确地控制显示颜色和色差。实验中采用了线性插值特性化方法，并提出了一种小范围三通道相互影响的颜色控制方法。实验结果表明：该方法对L^*，a^*，b^*控制的精度分别是0．14，0．082，0．103；对三种色差CIELAB，CIE94和CIEDE2000的控制精度分别是0．18，0．18，0．22。

The present accuracy of CRT characterization is about 0.5△E^*ab. In some experiments of measurement of color difference,color appearance,image appearance,contrast sensitivity function,accurate control color in small range around color centers is necessary. A method of color control in experiment is presented,which adopts the linear interpolation and takes into account the interaction of three channels in small range. With this method,The experimental results show that characterization accuracies are 0.14 ,0.082 ,0.103 for L^*,a^*,b^* respectively,and 0.18,0.18,0.22 for three kinds of color differences of CIELAB,CIE94,CIEDE2000.