金字塔匹配算法，包括SIFT特征点的提取，聚类和构造金字塔特征表示，论文参考：Beyond Bags of Features: Spatial Pyramid Matching for Recognizing Natural Scene Categories matlab代码

SIFT 角点检测,提取图像的焦点特征，SIFT 特征匹配算法是目前国内外特征点匹配研究领域的热点与难点，其匹配能力较强-SIFT CORNER DETECTION EXTRACTION OF IMAGE FEATURE

基于sift算法的图像匹配,能检测特征点和进行图像匹配-Image matching based on SIFT algorithm，Can detect feature points and image matching

运用FAST特征点匹配算法，通过模板对整张大图实现实现图像的特征点匹配，并获取匹配分数和匹配位置信息。(The FAST feature point matching algorithm is used to realize the feature point matching of the image through template pairing of the whole large image, and the matching score and matching location i