findchessboardCorners result

edit

Hi!

I have a chessboard where its height equal to its width, and I need to know how to change for example a recognized chessboard let's say a 3 rows to 3 columns, here a an example of a code a the result it may help you understanding my question :

int main () {
    cv::Mat frame;
    cv::Size board(3,3);
    cv::vector<cv::Point2f> imageCorners;
    cv::VideoCapture cap (0);
    int key =0;

    while(key != 27){
        cap >> frame;
        if(cv::findChessboardCorners(frame,board,imageCorners,CV_CALIB_CB_FILTER_QUADS)){
            cv::drawChessboardCorners(frame,board,imageCorners,true);
            cv::imwrite("stack.jpg",frame);
        }
        cv::imshow("frame",frame);
        key = cv::waitKey(10);
    }

    return 0 ;
}