http://blog.csdn.net/u011270282/article/details/50696616
http://blog.csdn.net/acs713/article/details/51362443
http://www.sunrayimage.com/yuvanalyzer.html
http://blog.csdn.net/jefry_xdz/article/details/7931018
http://blog.csdn.net/leixiaohua1020/article/details/12234821