OpenCV利用背景建模检测运动物体

#include <opencv\highgui.h> 
#include <stdio.h> 
 
int main( int argc, char** argv ){ 
 
  IplImage* pFrame = NULL; 
  IplImage* pFrImg = NULL; 
  IplImage* pBkImg = NULL; 
 
  CvMat* pFrameMat = NULL; 
  CvMat* pFrMat = NULL; 
  CvMat* pBkMat = NULL; 
 
  CvCapture* pCapture = NULL; 
 
  int nFrmNum = 0; 
 
  cvNamedWindow("video", 1); 
  cvNamedWindow("background",1); 
  cvNamedWindow("foreground",1); 
 
  cvMoveWindow("video", 30, 0); 
  cvMoveWindow("background", 360, 0); 
  cvMoveWindow("foreground", 690, 0); 
  //打开视频文件 
  if( !(pCapture = cvCaptureFromFile("video.avi")) ){ 
 
    fprintf(stderr, "Can not open video file video.avi\n"); 
    return -2; 
  } 
 
  //逐帧读取视频 
  while(pFrame = cvQueryFrame( pCapture )){ 
 
    nFrmNum++; 
 
    // 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); 
 
      // 转换为单通道图像再处理 
      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); 
 
      // 高斯滤波平滑图像 
      cvSmooth(pFrameMat, pFrameMat, CV_GAUSSIAN, 3, 0, 0); 
 
      // 当前帧与背景图相减 
      cvAbsDiff(pFrameMat, pBkMat, pFrMat); 
 
      // 二值化背景图 
      cvThreshold(pFrMat, pFrImg, 60, 255.0, CV_THRESH_BINARY); 
 
      //进行形态学滤波，去除噪声. 效果不好,将行车都作为噪声去除了 
      //cvErode(pFrImg, pFrImg, 0, 1); 
      //cvDilate(pFrImg, pFrImg, 0, 1); 
 
      // 更新背景 
      cvRunningAvg(pFrameMat, pBkMat, 0.003, 0); 
      // 将背景转换为图像格式，用于显示 
      cvConvert(pBkMat, pBkImg); 
 
      cvShowImage("video", pFrame); 
      cvShowImage("background", pBkImg); 
      cvShowImage("foreground", pFrImg); 
 
      if( cvWaitKey(2) >= 0 ) 
        break; 
    } 
  } 
 
  cvDestroyWindow("video"); 
  cvDestroyWindow("background"); 
  cvDestroyWindow("foreground"); 
 
  cvReleaseImage(&pFrImg); 
  cvReleaseImage(&pBkImg); 
 
  cvReleaseMat(&pFrameMat); 
  cvReleaseMat(&pFrMat); 
  cvReleaseMat(&pBkMat); 
 
  return 0; 
}