背景建模,运动物体检测.doc

/* 背景建模，运动物体检测* */* OpenCV example* Copyright (C) 2006 Shiqi Yu* This program is free software; you can redistribute it and/or modify* it under the terms of the GNU General Public License as published by* the Free Software Foundation; either version 2 of the License, or* (at your option) any later version.* This program is distributed in the hope that it will be useful,* but WITHOUT ANY WARRANTY; without even the implied warranty of* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the* GNU General Public License for more details.* You should have received a copy of the GNU General Public License* along with this program; if not, write to the Free Software* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA*/#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);if( argc != 2 )fprintf(stderr, Usage: bkgrd n);return -1;/打开视频文件if( !(pCapture = cvCreateFileCapture(argv1)fprintf(stderr, Can not open video file %sn, argv1);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);elsecvCvtColor(pFrame, pFrImg, CV_BGR2GRAY);cvConvert(pFrImg, pFrameMat);/高斯滤波先，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(foregrou