Color space conversion

In the field of color science, various color spaces such as RGB, XYZ, and Lab are used. I wrote an article for the understang of mutual relationship. Since mathematics such as matrices is used, please review the the math if it is necessary.

(1) XYZ color space
(2) RGB-XYZ conversion
Computing RGB-XYZ conversion matrix
(3) XYZ-Lab conversion
Bradford transformation
(4) YCbCr/YPbPr color space

T. Fujiwara, 2012/01