matlab实现的图像标注开源代码，极有参考价值。-matlab implementation of image annotation open source code, and a valuable reference.

基于SIFT的图像匹配配准，代码亲测好用，注释简单易懂，可以提取同名点，进行匹配配准。(Based on SIFT image matching registration, the code is easy to use, the annotation is simple and easy to understand, and the same name points can be extracted for matching registration.)