ICC特性文件中D65-D50的色度适性转换

一般生成ICC的时候的默认标准光源为D50，但是如果选择D65呢？内部又是如何计算的呢，请看如下分解：使用ICC V4规范中的Bradford转换矩阵（简称BDF）：

Brad = [0.8951, 0.2664, -0.1614; -0.7502, 1.7135,0 .0367; 0.0389, -0.0685, 1.0296];

CIE 15.2中D65和D50的值

D65 = [95.04; 100; 108.89];  D50 = [96.42; 100; 82.49];

roe65 = Brad*D65;  roe50 = Brad*D50;

midmat = zeros(3,3);

midmat(1,1) = roe50(1)/roe65(1);

midmat(2,2) = roe50(2)/roe65(2);

midmat(3,3) = roe50(3)/roe65(3);

adapt = inv(Brad)*midmat*Brad