product quantization image processing algorithm with matlab
getpqTrain.m 获取训练数据，保存为siftTrain.mat
getpqcodebook.m 训练数据，码本保存为codebook.mat，距离矩阵保存为dist.mat，若kmeans迭代出错重新运行本文件即可
productq.m 乘积量化，每幅图像对应编码保存为.mat，对应坐标保存为_local.mat
pqmatching.m 匹配
Stick-To/product-quantization
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