bkgrd.c
上传用户:banwdc
上传日期:2016-06-25
资源大小:2871k
文件大小:3k
- #include <stdio.h>
- #include <cv.h>
- #include <highgui.h>
- 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_name>n");
- return -1;
- }
- //打开视频文件
- if( !(pCapture = cvCaptureFromFile(argv[1])))
- {
- fprintf(stderr, "Can not open video file %sn", argv[1]);
- 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)
- {
- 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);
- //先做高斯滤波,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;
- } // end of if-else
- } // end of while-loop
- //销毁窗口
- cvDestroyWindow("video");
- cvDestroyWindow("background");
- cvDestroyWindow("foreground");
- //释放图像和矩阵
- cvReleaseImage(&pFrImg);
- cvReleaseImage(&pBkImg);
- cvReleaseMat(&pFrameMat);
- cvReleaseMat(&pFrMat);
- cvReleaseMat(&pBkMat);
- return 0;
- }