opencv4库文件，可以有效提高图像处理工作者的编程效率。使用时要包含cv.h，ipl.h和highgui.h三个头文件。-opencv4 libraries can effectively improve the image processing workers programming efficiency. Used to contain cv.h, ipl.h and highgui.h three headers.

视频读入,截取、灰度化显示！ #include <cv.h> #include <cxcore.h> #include <highgui.h> IplImage* cvGetSubImage(IplImage *image, CvRect roi) -Video read, interception, graying show!

利用算法检测特殊点并显示特殊点，然后特殊点之间进行线段连接(#include <stdio.h> #include <iostream> #include "opencv2/nonfree/features2d.hpp" #include "opencv2/legacy/legacy.hpp" #include "opencv2/core/core.hpp"// #include "openc

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