非局部均值滤波的方法在图像处理中具有很好的滤波效果，该代码是我根据论文non-local means denoising的算法编写出来的，滤波方法被我封装成了函数，可以直接进行调用，里面有实现非局部均值滤噪的demo，并且在代码中我进行了相关变量的注释以及一些函数的function，浅显易懂，大家可以结合论文看代码。
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