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| #include "cvcam.h"
#include "highgui.h"
#include <iostream>
static int index;
static IplImage* backImage =0;
static IplImage* previousImage =0; //buffer for the previous image
static IplImage* previousImage2 =0; //buffer for the previous image of previousImage
/**************************************************************************\
How to set video resolution programatically
\**************************************************************************/
void callback(IplImage* image)
{
IplImage* image1 = image;
IplImage* averageImage = 0; //Resulting image of the average
IplImage* sumImage = 0; //Resulting image of the addition
IplImage* subImage = 0; //Resulting image of the substraction
int i,j;
int iheight,iwidth;
assert (image);
iheight = image1->height;
iwidth = image1->width;
/* Print the original image in the window */
cvShowImage("Original window",image1);
/* Initialize image */
averageImage = cvCreateImage(cvSize(iwidth,iheight),IPL_DEPTH_8U,image1->nChannels);
subImage = cvCreateImage(cvSize(iwidth,iheight),IPL_DEPTH_8U,image1->nChannels);
subImage = cvCreateImage(cvSize(iwidth,iheight),IPL_DEPTH_8U,image1->nChannels);
index++; //count the number of frame
/*the two first Frame need to be saved in the buffer */
if (index < 3)
{
if(index == 1)
{
backImage = cvCreateImage(cvSize(iwidth,iheight),IPL_DEPTH_8U,image1->nChannels);
previousImage = cvCreateImage(cvSize(iwidth,iheight),IPL_DEPTH_8U,image1->nChannels);
previousImage2 = cvCreateImage(cvSize(iwidth,iheight),IPL_DEPTH_8U,image1->nChannels);
backImage = image1;
}
previousImage = image1;
previousImage2 = image1;
}
/*************************************/
/************* Treatment *************/
/*************************************/
/* AVERAGE */
cvAdd(previousImage, image1, sumImage , NULL);
cvAdd(sumImage, previousImage, sumImage , NULL);
for( i=0 ; i<sumImage->widthStep ; i++ )
{
averageImage->imageData[i] = sumImage->imageData[i]/3;
}
/* SUB */
cvSub (backImage, averageImage, subImage, NULL);
//save the treated frames in the previous frame for the average
previousImage2 = previousImage;
previousImage = image1;
}
int ShowCamVideo(HWND hwnd, int width, int height)
{
VidFormat vidFmt={ width, height, 30.0};
int ncams = cvcamGetCamerasCount( );
cvcamSetProperty(0, CVCAM_PROP_ENABLE, CVCAMTRUE);
cvcamSetProperty(0, CVCAM_PROP_CALLBACK,(void*)callback);
cvcamSetProperty(0, CVCAM_PROP_WINDOW, &hwnd);
//Set Video Format Property
cvcamSetProperty( 0, CVCAM_PROP_SETFORMAT, &vidFmt);
if( !cvcamInit() )
return 0;
cvcamStart();
return 1;
}
int main( int argc, char** argv )
{
index = 0;
cvNamedWindow("Original window", CV_WINDOW_AUTOSIZE);
cvNamedWindow("Treated window", CV_WINDOW_AUTOSIZE);
if( ShowCamVideo((HWND)cvGetWindowHandle("Treated window"), 640, 480) )
{
cvWaitKey(0);
cvcamStop();
}
cvcamExit();
} |
