原理：以待处理的像素作为中心，取一个nXn的模板，在模板中选择k个与待处理像素的值最接近的像素，将这k个像素的均值替换原来的像素值。 假设n=3，k=5，调用方法：b = KNNMeanFilter(a, 3, 5)-Principle: to be treated as the center pixel, take a nXn template select the template and the pending k-nearest pixel values of pixels, thi

本程序用matlab编写，根据haar小波算法，生成任意大小NXN的矩阵。里面有两种不同构造方法，第一种是自己编写，第二种有所改动-This program is written using matlab haar wavelet algorithm to generate a matrix of any size NXN. There are two different constructor, the first is to write your own, the second is sub