为了研究显示器颜色特性化问题，用多项式回归方法对色谱进行了分析，分别采用一次拟合与二次拟合建立了CIERGB到CIEL*a*b*空间的多项式模型。通过色差ΔE和拟合方差σ2的比较，分析了模型的差异。结果表明：多项式模型项数为9和11时，模型效果较为满意，项数为20时，模型出现震荡；并且二次拟合比一次拟合效果好。

Color characterization of display was studied by using polynomial regression and spectrum analysis. Once fitting and twice fitting between the RGB signals and the L*a*b* values were applied to establish color space conversion model. Through comparing the difference of ΔE and σ2, the differences of the models were analyzed. The results showed that the model can get satisfactory result when number of terms is 9 and 11; twice fitting is better than once fitting; when the term is 20, the model is not stable.