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import cv2
import numpy as np
from pyzbar.pyzbar import decode

# img = cv2.imread('fe156491210e36fbe16531dda1bef8b.jpg')
# code = decode(img)
# print(code)
cap = cv2.VideoCapture(0)
cap.set(3, 640)
cap.set(4, 480)

while True:
    success, img = cap.read()
    for barcode in decode(img):
        myData = barcode.data.decode('utf-8')
        print(myData)
        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, myData, (pts2[0], pts2[1]), cv2.FONT_HERSHEY_SIMPLEX,
                    0.9, (255, 0, 255), 2)

    cv2.imshow('Result', img)
    if cv2.waitKey(1) == ord('q'):
        break
cap.release()
cv2.destroyAllWindows()

上个是qr

下一个是有GUI

import PySimpleGUI as sg  #pip install pysimplegui
import cv2      #pip install opencv-python
import numpy as np   #pip install numpy

# 背景色
sg.theme('LightGreen')

# 定义窗口布局
layout = [
    [sg.Image(filename='', key='image')],
    [sg.Radio('None', 'Radio', True, size=(10, 1))],
    [sg.Radio('threshold', 'Radio', size=(10, 1), key='thresh'),
     sg.Slider((0, 255), 128, 1, orientation='h', size=(40, 15), key='thresh_slider')],
    # [sg.Radio('canny', 'Radio', size=(10, 1), key='canny'),
    #  sg.Slider((0, 255), 128, 1, orientation='h', size=(20, 15), key='canny_slider_a'),
    #  sg.Slider((0, 255), 128, 1, orientation='h', size=(20, 15), key='canny_slider_b')],
    # [sg.Radio('contour', 'Radio', size=(10, 1), key='contour'),
    #  sg.Slider((0, 255), 128, 1, orientation='h', size=(20, 15), key='contour_slider'),
    #  sg.Slider((0, 255), 80, 1, orientation='h', size=(20, 15), key='base_slider')],
    # [sg.Radio('blur', 'Radio', size=(10, 1), key='blur'),
    #  sg.Slider((1, 11), 1, 1, orientation='h', size=(40, 15), key='blur_slider')],
    # [sg.Radio('hue', 'Radio', size=(10, 1), key='hue'),
    #  sg.Slider((0, 225), 0, 1, orientation='h', size=(40, 15), key='hue_slider')],
    # [sg.Radio('enhance', 'Radio', size=(10, 1), key='enhance'),
    #  sg.Slider((1, 255), 128, 1, orientation='h', size=(40, 15), key='enhance_slider')],
    # [sg.Button('Exit', size=(10, 1))]
]

# 窗口设计
window = sg.Window('OpenCV实时图像处理',
                   layout,
                   location=(800, 400),
                   finalize=True)
# 打开内置摄像头
cap = cv2.VideoCapture(0)
while True:
    event, values = window.read(timeout=0, timeout_key='timeout')

    # 实时读取图像
    ret, frame = cap.read()
    # 在这改变图像
    frame=cv2.medianBlur(frame,3)

    # GUI实时更新
    imgbytes = cv2.imencode('.png', frame)[1].tobytes()
    window['image'].update(data=imgbytes)
    # key_pressed = cv2.waitKey(60)
    # if key_pressed == 27:
    #     break
# cap.release()
# cv2.destoryAllWindows()
window.close()