python实现树莓派生成并识别二维码

谁借莪１个温暖的怀抱￠ 2022-07-13 02:26 157阅读 0赞

### 设备及环境 ###

*  树莓派2代
 *  官方系统Raspbian
 *  官方树莓派摄像头模块

### 设备连接 ###

摄像头模块插入到距离网卡口最近的那个接口，板上有Camera的字样，看清楚正反面。

### 启用摄像头 ###

1.  `sudo raspi-config`
2.  选项：Camera
3.  选项：Enable
4.  选项：Finish
5.  选项：Reboot

### 关键代码 ###

安装依赖环境：

sudo apt-get install python-imaging
    sudo apt-get install zbar-tools
    sudo apt-get install qrencode
    sudo apt-get install python-pygame

python代码：

qrcode.py

#!/usr/bin/env python
    #-*- coding: UTF-8 -*-
    import os, signal, subprocess
    
    strfile1 = "qrcode"
    
    def erzeugen():
        text=raw_input(u"enter text QRCode: ")
        os.system("qrencode -o "+strfile1+".png '"+text+"'")
        print u"QRCode in: "+strfile1+".png"
        
    def lesen():
        os.system("raspistill -w 320 -h 240 -o /home/pi/cameraqr/image.jpg")
        print u"raspistill finished"
        #zbarcam=subprocess.Popen("zbarcam --raw --nodisplay /dev/video0", stdout=subprocess.PIPE, shell=True, preexec_fn=os.setsid)
        #print u"zbarcam started successfully..."
        #qrcodetext=zbarcam.stdout.readline()
        zbarcam=subprocess.Popen("zbarimg --raw /home/pi/cameraqr/image.jpg", stdout=subprocess.PIPE, shell=True, preexec_fn=os.setsid)
        qrcodetext=zbarcam.stdout.readline()
        if qrcodetext!="":
            print qrcodetext
        else:
            print u"qrcodetext is empty"
            
        #os.killpg(zbarcam.pid, signal.SIGTERM)
        print u"zbarcam stopped successfully..."
        return u"QRCode: "+qrcodetext

main.py

#!/usr/bin/env python
    #-*- coding: UTF-8 -*-
    
    import qrcode
    
    while (True):
        print u"1: qrcode create"
        print u"2: qrcode identify"
        print u"3: exit"
        select=int(raw_input(u"please choose: "))
        if select == 1:
            qrcode.erzeugen()
        elif select == 2:
            result=qrcode.lesen().strip()
            print result
        elif select == 3:
            print u"programme completed..."
            break

### 使用方法 ###

选项1：生成文本二维码，输入文本回车即可，路径在当前路径，文件名: qrcode.png

选项2：识别二维码：摄像头对准二维码即可（无法识别的提示，请摆准摄像头再次运行选项2）