How to get the resolution of camera?Can somebody give me some suggestion. Only i can do is the following,but it takes too much time to get the resolution.
void GetResolution( const int& countOfCamera, resolution_t (&resoulationTemp)[MAX_RESOLUTION] ){
VideoCapture *pVideoCaptures[MAX_CAMERA] = {NULL};
bool ret1 = false;
bool ret2 = false;
for ( int j=0; j<countOfCamera; ++j ) {
pVideoCaptures[j] = new VideoCapture(j);
/*==========================================================================
*If we don't do this, we will not open the Camera correctly
===========================================================================*/
pVideoCaptures[j]->set( CV_CAP_PROP_FRAME_WIDTH, defaultResolution.width );
pVideoCaptures[j]->set ( CV_CAP_PROP_FRAME_HEIGHT, defaultResolution.height );
}
for ( int i=0; i<MAX_RESOLUTION; ++i ) {
for ( int j=0; j<countOfCamera; ++j ) {
ret1 = pVideoCaptures[j]->set( CV_CAP_PROP_FRAME_WIDTH, resolutions[i].width );
ret2 = pVideoCaptures[j]->set ( CV_CAP_PROP_FRAME_HEIGHT, resolutions[i].height );
if ( !(ret1 && ret2) ) { //The resolution is not OK
break; //Check the next resolution
} else if ( j == ( countOfCamera -1 ) ) { //The resolution is OK for all camera,then store it.
resoulationTemp[i].width = resolutions[i].width;
resoulationTemp[i].height = resolutions[i].height;
} else {
//Do nothing
}
}
}
for ( int j=0; j<countOfCamera; ++j ) //Release the memory
{
pVideoCaptures[j]->release();
delete pVideoCaptures[j];
pVideoCaptures[j] = NULL;
}
}