中文说明：sift算法是计算机视觉中图像配准效果最好的一个算法，而这个代码可以实现基于SIFT特征点的检测和拼接功能，实现多张图片间的拼接融合功能。
English Description：
SIFT algorithm is one of the best image registration algorithms in computer vision, and this code can realize the detection and splicing function based on SIFT feature points, and realize the splicing and fusion function between multiple images.