python实现树莓派生成并识别二维码
python实现树莓派生成并识别二维码
参考来源:http://blog.csdn.net/Burgess_Liu/article/details/40397803
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
sudo raspi-config
- 选项:Camera
- 选项:Enable
- 选项:Finish
- 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)