如何在PHP中将CIE颜色空间转换为RGB或HEX颜色代码
问题描述：
我正在某个Web应用程序上工作，我想将CIE 1931颜色空间代码转换为RGB或HEX代码.如何转换?
I`m working on some web application where I want to convert CIE 1931 color space code to RGB or HEX code. How can I convert it?
答
好，要从XYZ转换为RGB，可以使用以下矩阵:
Well, to get to RGB from XYZ you can use this matrix:
[ R ] [ 3.240479 -1.537150 -0.498535 ] [ X ]
[ G ] = [ -0.969256 1.875992 0.041556 ] * [ Y ]
[ B ] [ 0.055648 -0.204043 1.057311 ] [ Z ]
但是由于您具有xyY(至少，我认为)值，因此您首先需要将它们转换为XYZ值，如下所示:
But since you have xyY (at least, I assume) values, you'll first need to convert them to XYZ values, like so:
X = (x*Y)/y
Y = Y
Z = ((1-x-y)*Y)/y
因此，从理论上讲，您可以这样计算:
So in theory, you could calculate it like so:
R = 3.240479*((x*Y)/y) + -1.537150*Y + -0.498535*(((1-x-y)*Y)/y)
G = -0.969256*((x*Y)/y) + 1.875992*Y + 0.041556*(((1-x-y)*Y)/y)
B = 0.055648*((x*Y)/y) + -0.204043*Y + 1.057311*(((1-x-y)*Y)/y)