来自于仕琪的讲稿《使用OpenCV进行图像处理》中的例程
简要说明:本程序尝试打开本电脑上的摄像头作为视频输入设备,或者将命令行的输入参数作为文件名来打开的视频文件。不管是哪一种方法,最后都是不断的循环处理一帧一帧地处理,涉及到的图像处理有背景擦除,平滑滤波,二值化等。
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- #include <stdio.h>
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- #include <cv.h>
- #include <cxcore.h>
- #include <highgui.h>
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- int main( int argc, char** argv )
- {
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- IplImage* pFrame = NULL;
- IplImage* pFrImg = NULL;
- IplImage* pBkImg = NULL;
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- CvMat* pFrameMat = NULL;
- CvMat* pFrMat = NULL;
- CvMat* pBkMat = NULL;
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- CvCapture* pCapture = NULL;
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- int nFrmNum = 0;
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- cvNamedWindow("video", 1);
- cvNamedWindow("background",1);
- cvNamedWindow("foreground",1);
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- cvMoveWindow("video", 30, 0);
- cvMoveWindow("background", 360, 0);
- cvMoveWindow("foreground", 690, 0);
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- if( argc > 2 )
- {
- fprintf(stderr, "Usage: bkgrd [video_file_name]\n");
- return -1;
- }
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- if (argc ==1)
- if( !(pCapture = cvCaptureFromCAM(-1)))
- {
- fprintf(stderr, "Can not open camera.\n");
- return -2;
- }
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- if(argc == 2)
- if( !(pCapture = cvCaptureFromFile(argv[1])))
- {
- fprintf(stderr, "Can not open video file %s\n", argv[1]);
- return -2;
- }
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- while(pFrame = cvQueryFrame( pCapture ))
- {
- nFrmNum++;
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- 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);
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- pBkMat = cvCreateMat(pFrame->height, pFrame->width, CV_32FC1);
- pFrMat = cvCreateMat(pFrame->height, pFrame->width, CV_32FC1);
- pFrameMat = cvCreateMat(pFrame->height, pFrame->width, CV_32FC1);
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- cvCvtColor(pFrame, pBkImg, CV_BGR2GRAY);
- cvCvtColor(pFrame, pFrImg, CV_BGR2GRAY);
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- cvConvert(pFrImg, pFrameMat);
- cvConvert(pFrImg, pFrMat);
- cvConvert(pFrImg, pBkMat);
- }
- else
- {
- cvCvtColor(pFrame, pFrImg, CV_BGR2GRAY);
- cvConvert(pFrImg, pFrameMat);
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- cvAbsDiff(pFrameMat, pBkMat, pFrMat);
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- cvThreshold(pFrMat, pFrImg, 60, 255.0, CV_THRESH_BINARY);
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- cvRunningAvg(pFrameMat, pBkMat, 0.003, 0);
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- cvConvert(pBkMat, pBkImg);
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- cvShowImage("video", pFrame);
- cvShowImage("background", pBkImg);
- cvShowImage("foreground", pFrImg);
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- if( cvWaitKey(2) >= 0 )
- break;
- }
- }
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- cvDestroyWindow("video");
- cvDestroyWindow("background");
- cvDestroyWindow("foreground");
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- cvReleaseImage(&pFrImg);
- cvReleaseImage(&pBkImg);
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- cvReleaseMat(&pFrameMat);
- cvReleaseMat(&pFrMat);
- cvReleaseMat(&pBkMat);
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- cvReleaseCapture(&pCapture);
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- return 0;
- }
refered to: http://www.opencv.org.cn/index.php/%E8%AF%BB%E8%A7%86%E9%A2%91%E6%96%87%E4%BB%B6%E5%92%8C%E8%BF%90%E5%8A%A8%E7%89%A9%E4%BD%93%E6%A3%80%E6%B5%8B
(于仕琪) |