cv2鼠标点击事件画圆

cv2鼠标点击事件画圆

本篇博客主要介绍利用python中cv2模块实现图片相应鼠标点击事件画圆。

下面是示例代码:

import cv2
import numpy as np


def draw_circle(event, x, y, flags, param):
    if event == cv2.EVENT_LBUTTONDOWN:
        cv2.circle(img, (x, y), 100, (255, 0, 0), -1)


img = np.zeros((512, 512, 3), np.uint8)
cv2.namedWindow('image', cv2.WINDOW_NORMAL)

cv2.setMouseCallback('image', draw_circle)

while True:
    cv2.imshow('image', img)
    key = cv2.waitKey(1)
    if key == ord('q'):
        break

cv2.destroyAllWindows()

结果示例:


猜你喜欢

转载自blog.csdn.net/github_39611196/article/details/80958818