python实现二维码、条形码识别

环境：

• python 3.7
• Win7

依赖包安装：

 pip install pillow
 pip install opencv-python
 pip install opencv-contrib-python
 pip install numpy
 pip instal pyzbar

首先使用cv2打开摄像头进行测试

import numpy as np
import cv2
capture = cv2.VideoCapture(0,cv2.CAP_DSHOW)
capture.set(3,640)
capture.set(4,480)
while True:
    # 读取摄像头中的图像，ok为是否读取成功的判断参数
    ret,img = capture.read()
    cv2.imshow('frame', img)
    k = cv2.waitKey(1)
    if k == 27:    # 'ESC'关闭
        break

如果看到屏幕出现一个窗口，上面显示着你的摄像头所拍摄到的画面说明测试成功

然后就直接上代码：

#written by DY
#http://dyblog.tk
#e-mail:duyun888888@qq.com

import cv2
from PIL import Image, ImageDraw, ImageFont
import csv
import pyzbar.pyzbar as pyzbar
import numpy
import time
#-----------------time----------
time1 = (time.strftime("%Y!%m@%d(%H*%M)%S`", time.localtime()))
time2 = time1.replace('!', '年')
time3 = time2.replace('@', '月')
time4 = time3.replace('(', '日')
time5 = time4.replace('*', '时')
time6 = time5.replace(')', '分')
timenow = time6.replace('`', '秒')
#-----------------time done----
barcodeData1 = ''

found = set()
capture = cv2.VideoCapture(0,cv2.CAP_DSHOW)
Files = "qrcode+barcode.dat"#新建一个日志，方便查阅（不需要可以删除）
while(1):
    ret,frame = capture.read()
    test = pyzbar.decode(frame)
    gray = cv2.cvtColor(frame,cv2.COLOR_BGR2GRAY)
    barcodes = pyzbar.decode(gray)
    for barcode in barcodes:
        (x, y, w, h) = barcode.rect
        cv2.rectangle(frame, (x, y), (x + w, y + h), (255, 255, 0), 2)
        barcodeData = barcode.data.decode("utf-8")
        barcodeType = barcode.type
        if barcodeData=='' or barcodeData!=barcodeData1:
            barcodeData1 = barcodeData
            #======================可以不需要，这是在图片上进行标注，里面采用了字体文件==============================
            img_PIL = Image.fromarray(cv2.cvtColor(frame, cv2.COLOR_BGR2RGB))
            font = ImageFont.truetype('arialbd.ttf', 25)#前面是字体文件，后面是字号
            fillColor = (0,255,0)
            position = (x, y-25)
            strl = barcodeData
            draw = ImageDraw.Draw(img_PIL)
            draw.text(position, strl,font=font,fill=fillColor)
            img_PIL.save('Identification_results.jpg','jpeg')#保存一张标记过的图片
            #====================================================
            print("Recognize result>>> type： {0}  content： {1}".format(barcodeType, barcodeData))
        else:
            pass
        if barcodeType not in found or barcodeData not in found:
            with open(Files,'a+') as w:
                csv_write = csv.writer(w)
                date = ['类型：'+barcodeType+'  识别结果：'+barcodeData+'   时间：'+timenow]
                csv_write.writerow(date)
            found.add(barcodeData)
    cv2.imshow('qrcode+barcode',frame)
    k = cv2.waitKey(1)
    if k == 27:
        break

#written by DY
#http://dyblog.tk
#e-mail:duyun888888@qq.com

效果如图所示：