CvSeq* contours = 0;
CvMemStorage* g_storage = NULL;
g_storage = cvCreateMemStorage(0);
cvFindContours( m_image, g_storage, &contours, sizeof(CvContour), CV_RETR_EXTERNAL);
if(contours==NULL)
return NULL;
CvSeq* contourPos;
CvRect bndRect = cvRect(0,0,0,0);
double contourArea,maxcontArea=0;
for( ; contours != 0; contours = contours->h_next )
{
/*bndRect = cvBoundingRect( contours, 0 );
contourArea=bndRect.width*bndRect.height;*/
//
contourArea = fabs(cvContourArea( contours, CV_WHOLE_SEQ ));
if(contourArea>=maxcontArea)//
{
maxcontArea=contourArea;
contourPos=contours;
}
}