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分析了ＣＩＥ１９３１ＸＹＺ色度系统光谱三刺激值与棉花色泽参数之间的关系，取得棉花体表的颜色参数，实现对棉花色泽的客观分级处理。为保证分级的正确性，还讨论了准确模拟人眼视觉色觉功能的ｙ（λ）、ｚ（λ）光电探测器的研制方法，并介绍了系统的工作原理和测量系统的设计。
The relationship between the spectral tristimulus value of CIE1931XYZ chromatic system and cotton color parameter was analyzed and the color parameters of cotton body surface were obtained to realize the objective grading treatment of cotton color. In order to ensure the correctness of classification, the method of developing y (λ) and z (λ) photodetectors that accurately simulate the human visual color vision function is also discussed. The working principle of the system and the design of the measurement system are also introduced.