on CMOS Image Sensor

http://sivp.sourceforge.net/func-list-0.5.0/rgb2ycbcr.htm
Y = 0.299*R + 0.587*G + 0.114*B
Cb = (B-Y)*0.564 + 0.5
Cr = (R-Y)*0.713 + 0.5

http://www.irit.fr/PERSONNEL/SAMOVA/joly/Teaching/M2IRR/IRR05/Berge-Gladel/rgb2ycbcr.html
Y = 0.299*R + 0.587*G + 0.114*B
Cb = - 0.1687*R - 0.3313*G + 0.5*B + 128
Cr = 0.5*R - 0.4187*G - 0.0813*B + 128

http://findingmyself.net/wp/archives/631
Y = 0.29900R + 0.58700G + 0.11400B
Cb = -0.16874R - 0.33126G + 0.50000B
Cr = 0.50000R - 0.41869G - 0.08131B
http://joyholic.kr/46
http://en.wikipedia.org/wiki/YCbCr
http://mindol.egloos.com/2127707
http://micro.magnet.fsu.edu/primer/digitalimaging/cmosimagesensors.html
http://www.dpreview.com/news/0706/07061401kodakhighsens.asp