Nister（2006）等人的层次聚类算法，按照多线程k-means方法进行多线程层次聚类，程序中代码对SIFT特征进行聚类。开发环境：vs2010-Implementation of hierarchical k-means, proposed by Nister et al, 2006. This is a multi-thread implementation of k-means and multi-thread implementation of the hierarchical me