opencv 鼠标截屏

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/he_wen_jie/article/details/82263616

import cv2
import numpy as np
from PIL import ImageGrab

drawing = False
ix, iy = -1, -1

def draw_circle(event, x, y, flags, param):
    global ix, iy, drawing
    if event == cv2.EVENT_LBUTTONDOWN:
        drawing = True
        ix, iy = x, y
    elif event == cv2.EVENT_MOUSEMOVE:
        if drawing == True:
            tmp = img.copy()
            cv2.rectangle(tmp, (ix, iy), (x, y), (0, 0, 255), 1)
            cv2.imshow('image', tmp)
    elif event == cv2.EVENT_LBUTTONUP:
        drawing = False
        cv2.rectangle(img, (ix, iy), (x, y), (0, 0, 255), 1)

pil_img = ImageGrab.grab()
img = np.array(pil_img)
cv2.namedWindow("image", cv2.WND_PROP_FULLSCREEN)
cv2.setWindowProperty("image",cv2.WND_PROP_FULLSCREEN,cv2.WINDOW_FULLSCREEN)

cv2.setMouseCallback('image', draw_circle)
cv2.imshow('image', img)

while (1):
    k = cv2.waitKey(1)
    if k == 27:
        break

cv2.destroyAllWindows()