利用MFC实现hough变化，对于学习数字摄影测量有用-MFC implements the hough changes, useful for learning digital photogrammetry

MFC实现灰度图像的边缘与轮廓，包括Robert,sobel,Kirsch等各种算子的边缘检测，hough变换，轮廓提取，种子填充，轮廓跟踪等-MFC to achieve gray image edges and contours, including Robert, sobel, Kirsch other operator edge detection, hough transform, contour extraction, seed filling, contour tracking.