opencv bwlabel

int bwLabel(const Mat& imgBw, Mat& imgLabeled) {
    Mat imgClone = Mat(imgBw.rows + , imgBw.cols + , imgBw.type(), Scalar());
    imgBw.copyTo(imgClone(Rect(, , imgBw.cols, imgBw.rows)));

    imgLabeled.create(imgClone.size(), imgClone.type());
    imgLabeled.setTo(Scalar::all());

    vector<vector<Point>>contours;
    vector<Vec4i>hierarchy;
    findContours(imgClone, contours, hierarchy, CV_RETR_CCOMP, CV_CHAIN_APPROX_NONE);

    vector<int>contoursLabel(contours.size(), );
    int numlab = ;

    for (vector<vector<Point>>::size_type i = ; i < contours.size(); i++) {
        if (hierarchy[i][] >= ) {
            continue;
        }
        for (vector<Point>::size_type k = ; k != contours[i].size(); k++) {
            //imgLabeled.at<uchar>(contours[i][k].y, contours[i][k].x) = numlab;
            *(imgLabeled.data + imgLabeled.step[] * contours[i][k].y + imgLabeled.step[] * contours[i][k].x) = numlab;
        }
        numlab++;
    }
    for (int i = ; i < imgLabeled.rows; i++) {
        for (int j = ; j < imgLabeled.cols; j++) {
            //if (imgClone.at<uchar>(i, j) != 0 && imgLabeled.at<uchar>(i, j) == 0)
            //{
            //    imgLabeled.at<uchar>(i, j) = imgLabeled.at<uchar>(i, j - 1);
            //}
            if (*(imgClone.data + imgClone.step[] * i + imgClone.step[] * j) !=  && *(imgLabeled.data + imgLabeled.step[] * i + imgLabeled.step[] * j) == ) {
                *(imgLabeled.data + imgLabeled.step[] * i + imgLabeled.step[] * j) = *(imgLabeled.data + imgLabeled.step[] * i + imgLabeled.step[] * (j - ));
            }
        }
    }
    imgLabeled = imgLabeled(Rect(, , imgBw.cols, imgBw.rows)).clone();
    return numlab - ;
}