opencv在图中画矩形rectangle用法

rectangle(Mat格式的图像, Point(左上角点的列坐标, 左上角的点的行坐标), Point(右下角点的列坐标, 右下角点的行坐标), Scalar(255, 0, 0), 1, 8, 0);

其函数定义为

Draws a simple, thick, or filled up-right rectangle.

C++:  void  rectangle (InputOutputArray  img, Point  pt1, Point  pt2, const Scalar&  color, int  thickness=1, int lineType=LINE_8, int  shift=0  )

C++:  void  rectangle (Mat&  img, Rect  rec, const Scalar&  color, int  thickness=1, int  lineType=LINE_8, int  shift=0  )