中文说明：本程序为一个demo，采用SIFT将多张图片合成一张大图片，效果非常好。将多张图片中的对应点进行匹配，然后合成，同时进行校正。
English Description：
This program is a demo, using sift to synthesize multiple pictures into a large picture, the effect is very good. The corresponding points in multiple images are matched, then synthesized and corrected at the same time.