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-Achieve SIFT feature point detection and image stitching function, mainly on the basis of the original author to add a point or show all the characteristics of overlap only feature points c