数据挖掘电子书，10本涵盖很的很广，值得大家借鉴学习-Data mining data, it is worth to see! Have contact with and exposure data mining to be friends can see! 10 books, covering a very wide!

主要是进行一个人脸的光照补偿和灰度处理后的直方图，当然有些比较图在里面。- Mainly histogram after exposure compensation and gradation processing of a human face, of course, some comparison chart on the inside