FG模型

一直没搞懂CvBGStatModel和CvFGDStatModel有什么区别。CvBGStatModel模型的创建用cvCreateGaussianBGModel，CvFGDStatModel模型的创建用cvCreateFGDStatModel，它们的更新都用cvUpdateBGStatModel。

#include<iostream>

#include<opencv2/opencv.hpp>

#include<opencv/cvaux.hpp>

using namespace std;

int main()

{

    IplImage *pFrame=NULL;

    IplImage *pFrImg=NULL;

    IplImage *pBkImg=NULL;

    CvCapture *pCapture=NULL;

    pCapture= cvCreateFileCapture("video.avi");

    cvNamedWindow("video",1);

    cvNamedWindow("background",1);

    cvNamedWindow("foreground",1);

    cvMoveWindow("video",30,0);

    cvMoveWindow("background",450,0);

    cvMoveWindow("foreground",900,0);

   CvFGDStatModel* fg_model=NULL;

    int nFrmNum=0;

    while(pFrame=cvQueryFrame(pCapture))

    {

        nFrmNum++;

        if(nFrmNum==1)

        {

            pBkImg=cvCreateImage(cvSize(pFrame->width, pFrame->height),IPL_DEPTH_8U,3);

            pFrImg=cvCreateImage(cvSize(pFrame->width, pFrame->height),IPL_DEPTH_8U,3);

            fg_model = (CvFGDStatModel*)cvCreateFGDStatModel(pFrame, 0);

        }

        else

        {

           cvUpdateBGStatModel(pFrame, (CvBGStatModel *)fg_model );

            pFrImg=fg_model->foreground;

            cvDilate(pFrImg,pFrImg);

//            cvErode(pFrImg,pFrImg);//腐蚀

            pBkImg=fg_model->background;

            cvShowImage("video",pFrame);

            cvShowImage("background",pBkImg);

            cvShowImage("foreground",pFrImg);

        }

        if(cvWaitKey(20)>=0)

            break;

    }

    cvReleaseBGStatModel((CvBGStatModel**)&fg_model);

    cvDestroyAllWindows();

    cvReleaseImage(&pFrame);

    cvReleaseImage(&pFrImg);

    cvReleaseImage(&pBkImg);

    cvReleaseCapture(&pCapture);

    return 0;

}

程序运行结果：