将Mat转化为IplImage

void ConnectedComponents(Mat &mask_process, int poly1_hull0, float perimScale, int number = 0,
                         Rect &bounding_box = Rect(), Point &contour_centers = Point(-1, -1))
{
    /*下面4句代码是为了兼容原函数接口，即内部使用的是c风格，但是其接口是c++风格的*/
    IplImage *mask = &mask_process.operator IplImage();
    int *num = &number;
    CvRect *bbs = &bounding_box.operator CvRect();
    CvPoint *centers = &contour_centers.operator CvPoint();
}