vc++和OpenCV结合找出图片中的角点，并且做出标记。此程序同时可以用于图片特征点的提取，用于特征匹配的后续开发做准备。-vc++ and OpenCV combination to find the picture of the corner and make a tag. At the same time, this procedure can be used for image feature points extraction, feature matching for the follow-up to prepare for development.