kmeans.c from opencv

实现Kmeans，输入是txt文本文件，输出也是，结构清晰易懂，是非常好的Kmeans代码，个人觉得比opencv自带的kmeans函数好用-Achieve Kmeans, input is a txt file, the output is also a clear structure to understand, is a very good Kmeans code, personal feel than opencv kmeans function comes handy

This code is a Kmeans filter for images