基于OpenCv的视频读入.doc

/* * 背景建模，运动物体检测 * */* * OpenCV example * By Shiqi Yu 2006 */#include #include #include #include #pragma comment(lib,cv.lib)#pragma comment(lib,highgui.lib)#pragma comment(lib,cvcam.lib)#pragma comment(lib,cvaux.lib)#pragma comment(lib,ml.lib)#pragma comment(lib,cxcore.lib)int main( int argc, char* argv ) /声明IplImage指针 IplImage* pFrame = NULL; IplImage* pFrImg = NULL; IplImage* pBkImg = NULL; CvMat* pFrameMat = NULL; CvMat* pFrMat = NULL; CvMat* pBkMat = NULL; CvCapture* pCapture = NULL; int nFrmNum = 0; /创建窗口 cvNamedWindow(video, 1); cvNamedWindow(background,1); cvNamedWindow(foreground,1); /使窗口有序排列 cvMoveWindow(video, 30, 0); cvMoveWindow(background, 360, 0); cvMoveWindow(foreground, 690, 0);/* if( argc 2 ) fprintf(stderr, Usage: bkgrd video_file_namen); return -1; /打开摄像头 if (argc =1) if( !(pCapture = cvCaptureFromCAM(-1) fprintf(stderr, Can not open camera.n);return -2; /打开视频文件 if(argc = 2) if( !(pCapture = cvCaptureFromFile(argv1) fprintf(stderr, Can not open video file %sn, argv1);return -2; */ pCapture = cvCaptureFromFile(car.avi); /逐帧读取视频 while(pFrame = cvQueryFrame( pCapture ) nFrmNum+; /如果是第一帧，需要申请内存，并初始化 if(nFrmNum = 1) pBkImg = cvCreateImage(cvSize(pFrame-width, pFrame-height), IPL_DEPTH_8U,1); pFrImg = cvCreateImage(cvSize(pFrame-width, pFrame-height), IPL_DEPTH_8U,1); pBkMat = cvCreateMat(pFrame-height, pFrame-width, CV_32FC1); pFrMat = cvCreateMat(pFrame-height, pFrame-width, CV_32FC1); pFrameMat = cvCreateMat(pFrame-height, pFrame-width, CV_32FC1); /转化成单通道图像再处理 cvCvtColor(pFrame, pBkImg, CV_BGR2GRAY); cvCvtColor(pFrame, pFrImg, CV_BGR2GRAY); cvConvert(pFrImg, pFrameMat); cvConvert(pFrImg, pFrMat); cvConvert(pFrImg, pBkMat); else cvCvtColor(pFrame, pFrImg, CV_BGR2GRAY); cvConvert(pFrImg, pFrameMat); /高斯滤波先，以平滑图像 /cvSmooth(pFrameMat, pFrameMat, CV_GAUSSIAN, 3, 0, 0); /当前帧跟背景图相减 cvAbsDiff(pFrameMat, pBkMat, pFrMat); /二值化前景图 cvThreshold(pFrMat, pFrImg, 60, 255.0, CV_THRESH_BINARY); /进行形态学滤波，去掉噪音 /cvErode(pFrImg, pFrImg, 0, 1); /cvDilate(pFrImg, pFrImg, 0, 1); /更新背景 cvRunningAvg(pFrameMat, pBkMat, 0.003, 0); /将背景转化为图像格式，用以显示 cvConvert(pBkMat, pBkImg); /显示图像 cvShowImage(video, pFrame); cvShowImage(background, pBkImg); cvShowImage(foreground, pFrImg); /如果有按键事件，则跳出循环 /此等待也为cvShowImage函数提供时间完成显示 /等待时间可以根据CPU速度调整 if( cvWaitKey(2) = 0 ) break; /销毁窗口 cvDestroyWindow(video); cvDestroyWindow(background); cvDestroyWindow(foreground); /释放图像和矩阵 cvReleaseImage(&pFrImg); cvReleas