Mat cannyImage;

     /// Detect edges using canny

     Canny(src, cannyImage, , , );

     vector<vector<Point> > contours;

     vector<Vec4i> hierarchy;

     /// Find contours

     findContours(cannyImage, contours, hierarchy, CV_RETR_EXTERNAL /* CV_RETR_EXTERNAL CV_RETR_LIST CV_RETR_CCOMP RETR_TREE CV_RETR_FLOODFILL*/, CHAIN_APPROX_SIMPLE, Point(, ));

     /// Approximate contours to polygons + get bounding rects and circles

     vector<vector<Point> > contours_poly(contours.size());

     vector<Rect> boundRect(contours.size());

     for (size_t i = ; i < contours.size(); i++)

     {

         approxPolyDP(Mat(contours[i]), contours_poly[i], , true);

         boundRect[i] = boundingRect(Mat(contours_poly[i]));

     }