python qr码识别_python cv.qrcodedetector()

# -*- coding: utf-8 -*-
"""
Created on Tue Aug  3 15:32:19 2021

@author: song2
"""

import cv2 as cv
import numpy as np

# 读取图像
cap=cv.VideoCapture(1)
cap.set(3, 640)# 帧宽
cap.set(4, 480)# 帧高
cap2=cv.VideoCapture(2)
cap2.set(3, 640)# 帧宽
cap2.set(4, 480)# 帧高
#font = cv2.FONT_HERSHEY_SIMPLEX  # 设置字体样式
while(1):
    ret,frame=cap.read()
    ret2,frame2=cap2.read()
    try:
        gray = cv.cvtColor(frame, cv.COLOR_BGR2GRAY)#转灰度图像
    
        gray2 = cv.cvtColor(frame2, cv.COLOR_BGR2GRAY)
        
        # 检测
        qrcoder = cv.QRCodeDetector()
        # 解码
        codeinfo, points, straight_qrcode = qrcoder.detectAndDecode(gray)
        codeinfo2, points2, straight_qrcode2 = qrcoder.detectAndDecode(gray2)
        #print(points)
        #result = np.copy(src)
    
        cv.putText(frame,  str(codeinfo), (20, 120), cv.FONT_HERSHEY_SIMPLEX, 5, (255, 0, 0), 3);
        cv.imshow("result", frame)
        cv.putText(frame2,  str(codeinfo2
                                ), (20, 120), cv.FONT_HERSHEY_SIMPLEX, 5, (255, 0, 0), 3);
        cv.imshow("result2", frame2)
    except :
        pass
    k=cv.waitKey(5)&0xFF
    #cv2.imshow('result', dilated)
    if k==27:
        break
cv.waitKey(0)
cv.destroyAllWindows()
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47