为了研究人眼对不同的颜色的辨色阈值, 利用积分球配出色差值可以调整的颜色刺激图样, 采用限定法, 检测出6名色觉正常的观察者在4个颜色中心的辨色阈值, 并和CRT的数据进行比较。采用性能因子PF/3分析观察者的测试精度, 并在a*b*图上绘制实验颜色恰可辨别图。通过对实验数据进行处理和分析, 人眼在4个颜色中心的辨色阈值是有差异, 在评价辨色阈值的性能方面, CIEDE2000色差公式好于CIELAB色差公式。实验的结果可为颜色科学及色差公式的改进和发展提供参考。

In order to research the human color discrimination thresholds of different colors, the threshold experiment at the four color centers is carried out by a panel of 6 observers with normal color vision using color stimuli that is generated by integrating sphere based on the psychophysical method of limits. The visual results is compared with the data generated by CRT. The observer test accuracy is estimated using performance factor PF/3, then experimental color discrimination are plotted in a*b* diagram．The detailed processing and analysis of the experimental results indicate that the color discrimination thresholds of human eyes is not same for the four color regions and the color difference formula CIEDE2000 is superior to CIELAB in different aspect. The experimental data can provide references for the improvement of color science and color-difference formula．