实现了SIFT特征点的提取和匹配功能，匹配算法使用的是ANN最相似最近邻居法。-Achieved a SIFT feature point extraction and matching, matching algorithm using ANN is most similar to nearest neighbor method.
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特征点匹配－Sift+ANN sift Images ANN 2004 IJCV Distinctive Image Features from scale invariant keypoints.pdf ANNmanual.pdf Example.cpp Example.h
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