中文说明：实现SIFT特征点的检测及图像拼接功能，主要在原来作者的基础上添加了显示全部特征点或者只显示重叠区域特征点，能够直接使用
English Description：
The function of SIFT feature point detection and image mosaic is realized. It mainly adds the function of displaying all feature points or only displaying overlapping area feature points on the basis of the original author, which can be used directly