C++ OPENCV 获得两矩形的交集矩形

获得两个矩形的交集，该交集类型也是矩形

这种情况就范围交集的矩形，蓝色部分；

这种情况返回 cv::Rect(cv::Point(0,0),cv::Point(0,0) );

欢迎测试，提BUG；

/** @brief 获得两个矩形的交集
@param rect1；　rect2 is lds range.
@output cv::Rect 交集
 */
cv::Rect get_IOU(cv::Rect rect1, cv::Rect rect2){


    // 横向和纵向距离
    cout <<"input " << rect1 << rect2 << endl;
    cv::Point center_rect1 = (rect1.tl()+rect1.br()) * 0.5;
    cv::Point center_rect2 = (rect2.tl()+rect2.br()) * 0.5;
    cout <<"input center" << rect1 << rect2 << endl;
    auto verti_dis = abs(center_rect1.x - center_rect2.x);
    auto horiz_dis = abs(center_rect1.y - center_rect2.y);
    // 高度和宽度之和的一半
    auto half_w = (rect1.width + rect2.width) / 2;
    auto half_y = (rect1.height + rect2.height) / 2;
    cout << verti_dis << " " << half_y << " " << verti_dis << " " << half_w << endl;

    if ( horiz_dis < half_y && verti_dis < half_w) {
        int x_tl , x_br, y_tl, y_br;

        if(rect1.tl().x > rect2.tl().x){
            if(rect1.br().x > rect2.br().x){
                x_tl = rect1.tl().x;
                x_br = rect2.br().x;
            } else{
                x_tl = rect1.tl().x;
                x_br = rect1.br().x;
            }
        } else{
            if(rect1.br().x > rect2.br().x){
                x_tl = rect2.tl().x;
                x_br = rect2.br().x;
            } else{
                x_tl = rect2.tl().x;
                x_br = rect1.br().x;
            }
        }


        if(rect1.tl().y > rect2.tl().y){
            if(rect1.br().y > rect2.br().y){
                y_tl = rect1.tl().y;
                y_br = rect2.br().y;
            } else{
                y_tl = rect1.tl().y;
                y_br = rect1.br().y;
            }
        } else{
            if(rect1.br().x > rect2.br().y){
                y_tl = rect2.tl().y;
                y_br = rect2.br().y;
            } else{
                y_tl = rect2.tl().y;
                y_br = rect1.br().y;
            }
        }

        cv::Point tl(x_tl, y_tl);
        cv::Point br(x_br, y_br);
        return cv::Rect(tl, br);

    }
    return cv::Rect(cv::Point(0,0),cv::Point(0,0) );


}