1 #!/usr/bin/python
2 # -*- coding: utf-8 -*-
3 # @Time : 2021/8/22 22:28
4 # @Author : yangdj 553849374@qq.com
5 # @File : img_draw_rectangle.py
6 # @Software: PyCharm
7 # 在图片中选取roi并用鼠标画出矩形框
8
9 import cv2
10
11 img = cv2.imread(r"F:\python\pytool-httpapi\static\upload\temp_files\2021-08-21\0a5f89c640124aa4b1659ade7a5e0c29.jpg")
12
13 drawing = False
14 ix, iy = -1, -1
15 tempFlag = False
16
17
18 def draw_circle(event, x, y, flags, param):
19 global ix, iy, drawing, mode, cap, template, tempFlag
20 if event == cv2.EVENT_LBUTTONDOWN:
21 tempFlag = True
22 drawing = True
23 ix, iy = x, y # 按下鼠标左键，用全局变量ix,iy记录下当前坐标点
24 elif event == cv2.EVENT_LBUTTONUP:
25 if drawing == True:
26 drawing = False # 鼠标左键抬起，画出矩形框
27 cv2.rectangle(img, (ix, iy), (x, y), (0, 255, 0), 1)
28 template = img[iy:y, ix:x, :] # 截取框中的目标图像
29 # 打印两个点的坐标，和最终原点+宽和高
30 print((ix, iy), (x, y), f'{ix},{iy},{x - ix},{y - iy}')
31 # cap = cv2.VideoCapture(-1) #打开摄像头
32 # cv2.imshow('img', img) # 显示画框后的图像
33 cv2.imshow('template', template)
34
35
36 cv2.namedWindow("image")
37 cv2.setMouseCallback("image", draw_circle)
38 cv2.imshow("image", img)
39
40 while (True):
41 try:
42 cv2.waitKey(100)
43 except Exception:
44 cv2.destroyAllWindows()
45 break
46
47 cv2.waitKey(0)
48 cv2.destroyAllWindows()
