说明：  用openCV开发的角点检测程序源码，其中第一个角点检测是从一缓冲区读入到图像，转换成IplImaage后检测出角点；第二个角点检测函数是检测两副图像的角点，以便于进行匹配等运算操作。 可直接使用。
(With the the corner detection openCV development program source code, which after the first corner detection is read from the buffer into the image, convert IplImaage detected corner second corner detection function is the angle of detection of two images point in order to facilitate the arithmetic operation of the matching, etc.. Can be used directly.)