#include

#include

#include

#include

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 %s\n", 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;

}