cv2把鼠标当画笔
本篇博客主要介绍通过pyhon中的cv2模块实现将鼠标当做画笔。
下面是示例代码:
import cv2 import numpy as np drawing = False ix, iy = -1, -1 def draw_circle(event, x, y, flags, param): global ix, iy, drawing, mode if event == cv2.EVENT_LBUTTONDOWN: drawing = True ix, iy = x, y elif event == cv2.EVENT_MOUSEMOVE and flags == cv2.EVENT_FLAG_LBUTTON: if drawing is True: if mode is True: cv2.rectangle(img, (ix, iy), (x, y), (0, 255, 0), -1) else: cv2.circle(img, (x, y), 3, (0, 0, 255), -1) elif event == cv2.EVENT_LBUTTONUP: drawing = False img = np.zeros((512, 512, 3), np.uint8) mode = False cv2.namedWindow('image', 0) cv2.setMouseCallback('image', draw_circle) while True: cv2.imshow('image', img) k = cv2.waitKey(1) if k == ord('m'): mode = not mode elif k == ord('q'): break
结果示例: