unfilled专题

In our last example, we drew filled rectangle. You modify the code to draw an unfilled rectangle.

文章目录 前言一、last example二、modify the code to draw an unfilled rectangle.1.修改方法第一步第二步 前言 题目地址为:https://docs.opencv.org/4.x/db/d5b/tutorial_py_mouse_handling.html 题目内容:In our last example, we