#include <stdio.h> #include <cv.h> #include <cxcore.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);
argc = 1;
if( argc > 2 ) {
fprintf(stderr, "Usage: bkgrd [video_file_name]n");
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(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;
}
}
//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);
cvReleaseCapture(&pCapture);
return 0;
}