白平衡

https://blog.csdn.net/dcrmg/article/details/53545510

简单灰度世界代码

https://wenku.baidu.com/view/bce7d11010a6f524ccbf8513.html

所有算法比较

https://blog.csdn.net/cy20161212/article/details/53102694

https://blog.csdn.net/yapingmcu/article/details/50637797（有写测色温曲线）

AWB算法原理

https://blog.csdn.net/real_myth/article/details/50948455

YCbCr然后有Mr