局部二值化

局部二值化算法Niblack OpenCV实现

https://blog.csdn.net/fabulousli/article/details/52203263

Niblack和局部均值算法的二值化比较

https://blog.csdn.net/wu_lian_nan/article/details/69371720

一种局部二值化算法：Sauvola算法

https://www.cnblogs.com/hellowooorld/p/11040880.html