opencv 读取视频以及灰度化

来源：互联网发布：解析域名什么意思编辑：程序博客网时间：2024/05/16 08:46
int main( int argc, char** argv ){//声明IplImage指针IplImage* pFrame = NULL; IplImage* pFrImg = NULL;CvMat* pFrameMat = NULL;CvMat* pFrMat = NULL;CvMat* pBkMat = NULL;CvCapture* pCapture = NULL;int nFrmNum = 0;//创建窗口cvNamedWindow("video", 1);cvNamedWindow("foreground",1);//使窗口有序排列cvMoveWindow("video", 30, 0);cvMoveWindow("foreground", 690, 0);if( !(pCapture = cvCaptureFromAVI(".\\test.avi"))){//pCapture = cvCaptureFromCAM(-1))fprintf(stderr, "Can not open camera.\n");return -2;}//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){pFrImg = cvCreateImage(cvSize(pFrame->width, pFrame->height),  IPL_DEPTH_8U,1);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, pFrImg, CV_BGR2GRAY);cvConvert(pFrImg, pFrameMat);cvConvert(pFrImg, pFrMat);}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pFrImg=RGBtoGRAYTmax(pFrImg,pFrame/*IplImage *out  */);//break;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(20) >= 0 ){break;}}}cvWaitKey();//销毁窗口cvDestroyWindow("video");cvDestroyWindow("foreground");//释放图像和矩阵cvReleaseImage(&pFrImg);cvReleaseMat(&pFrameMat);cvReleaseMat(&pFrMat);cvReleaseCapture(&pCapture);return 0;}
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