python 使用 pyzbar识别QR二维码_pyzbar 识别qrcode

1.安装pyzbar：pip install pyzbar

2.识别QR完整代码如下，经过测试识别手机屏幕较好，其他的纸质码不太好

import numpy as np
import matplotlib.pyplot as plt
import cv2
import time

from pyzbar.pyzbar import decode

cap = cv2.VideoCapture(0)
cap.set(3, 640)
cap.set(4, 480)

while True:

    success, img = cap.read()

    for barcode in decode(img):
       
        codeData = barcode.data.decode('utf-8')
        print(time.strftime("%H:%M:%S-")+codeData)
        pts = np.array([barcode.polygon],np.int32)
        pts = pts.reshape((-1,1,2))
        cv2.polylines(img,[pts],True,(255,0,255),5)
        pts2 = barcode.rect
        cv2.putText(img,time.strftime("%H:%M:%S-")+codeData,(pts2[0],pts2[1]),cv2.FONT_HERSHEY_SIMPLEX,0.9,(255,0,255),2)

    cv2.imshow('image', img)
    cv2.waitKey(1)

3.默认打开电脑的摄像头，识别效果如下，手机码效果不错