中文说明：Image match on SIFT，利用matlab工具，实现双目匹配测距，使用的图像前提是相机标定过，位置大致水平的，亲测实验能运行，结果精度较好
English Description：
Image match on SIFT, the use of MATLAB tools to achieve binocular matching ranging, the use of the image premise is the camera calibration, the position is roughly horizontal, pro test experiment can run, the results are accurate