python zbar

zbar 可以解析 qrcode

不过安装过程可是艰辛

本地开发用mac，生产服务器用ubuntu。安装方式不同。整理出以下安装方式

Ubuntu 14.04.1 LTS (GNU/Linux 3.8.0-29-generic x86_64)

$ apt-get install libzbar-dev

$ pip install zbar

Ubuntu 10.04.4 LTS

apt-get install libzbar-dev

apt-get install python-gtk2-dev

wget http://iweb.dl.sourceforge.net/project/zbar/zbar/0.10/zbar-0.10.tar.bz2

bzip2 -d zbar-0.10.tar.bz2

tar -xvf zbar-0.10.tar

./configure  --without-qt

make

make install

pip install zbar

mac

brew update && brew upgrade

brew install zbar

不要pip install zbar。而是下载这个包，修正了mac下的segmentation fault的bug

https://github.com/npinchot/zbar

python setup.py install

qrcode解码例子

#!/usr/bin/python
import zbar
from PIL import Image
import urllib
import cStringIO

#图片地址替换成你的qrcode图片地址
URL = (‘http://example.qiniudn.com/msgimagepicc4WJ-4iTk8.jpeg‘)
# create a reader
scanner = zbar.ImageScanner()
# configure the reader
scanner.parse_config(‘enable‘)
# obtain image data
imgfile = cStringIO.StringIO(urllib.urlopen(URL).read())
pil = Image.open(imgfile).convert(‘L‘)

width, height = pil.size
raw = pil.tostring()
# wrap image data
image = zbar.Image(width, height, ‘Y800‘, raw)
# scan the image for barcodes
scanner.scan(image)
# extract results
for symbol in image:
    # do something useful with results
    print ‘decoded‘, symbol.type, ‘symbol‘, ‘"%s"‘ % symbol.data
# clean up
del(image)