pyramid.cpp

opencv codes in C++ (linux and eclipse)

#include "cv.h"
#include "cvaux.h"
#include "highgui.h"
#include <stdio.h>

int main(int argc, char** argv)
{
	
     IplImage* tmp_frame = NULL;
     CvCapture* cap = NULL;
     //capture frame from video file
     cap =   cvCaptureFromFile("out.avi");
      //query the frame
     tmp_frame = cvQueryFrame(cap);
     // create an image
     IplImage* output = cvCreateImage( cvSize(tmp_frame->width/2,tmp_frame->height/2),tmp_frame->depth,tmp_frame->nChannels );
     
     if(!tmp_frame)
     {
         printf("bad video \n");
         exit(0);
     }
     //windows to display images.
     cvNamedWindow("BackGround", 1);
     cvNamedWindow("ForeGround", 1);
     cvNamedWindow( "pyramid",1 );
     
   
     //create BG model
     CvBGStatModel* bg_model = cvCreateGaussianBGModel( tmp_frame );
     //CvBGStatModel* bg_model = cvCreateFGDStatModel( tmp_frame );
//loop through each frame
     for( int fr = 1;tmp_frame; tmp_frame = cvQueryFrame(cap), fr++ )
      {
      	//update the frame
        cvUpdateBGStatModel( tmp_frame, bg_model );
	//display background image
        cvShowImage("BackGround", bg_model-> background);
         //display foreground image
        cvShowImage("ForeGround", bg_model-> foreground);
        cvMoveWindow("ForeGround",500,0);
        //pyramid image
        cvPyrDown( tmp_frame, output,IPL_GAUSSIAN_5x5 );	
	//displaying image
        cvShowImage("pyramid", output);
        cvWaitKey(50);
        	if(cvWaitKey(10) >= 0)
                break;

      }
      
      cvReleaseBGStatModel( &bg_model );
      cvReleaseCapture(&cap);
      
      return 0;
}