说明：  PDF文件。是篇论文，题目为《基于改进SIFT 的结构与纹理相似图像配准方法》，载于云南大学学报201133。关于sift特征的论文。
(PDF file. Papers, entitled " similar image registration method based on improved SIFT structure and texture, are set out in Yunnan University 201133. About sift features papers.)