python zxing识别二维码、条形码
项目地址：https://github.com/oostendo/python-zxing
项目实际就是下载3个jar包，subprocess调用一下而已，比较简单。
1、下载3个依赖包，放在python-zxing中。
相关命令：
git clone https://github.com/oostendo/python-zxing.git
cd python-zxing
wget http://central.maven.org/maven2/com/google/zxing/core/3.3.3/core-3.3.3.jar
wget http://central.maven.org/maven2/com/google/zxing/javase/3.3.3/javase-3.3.3.jar
wget http://central.maven.org/maven2/com/beust/jcommander/1.72/jcommander-1.72.jar2、执行命令：setup.py install
E:\python-zxing>python setup.py install
running install
running build
running build_py
creating build
creating build\lib
creating build\lib\zxing
copying zxing\tests.py -> build\lib\zxing
copying zxing\__init__.py -> build\lib\zxing
running install_lib
creating C:\Python27\Lib\site-packages\zxing
copying build\lib\zxing\tests.py -> C:\Python27\Lib\site-packages\zxing
copying build\lib\zxing\__init__.py -> C:\Python27\Lib\site-packages\zxing
byte-compiling C:\Python27\Lib\site-packages\zxing\tests.py to tests.pyc
byte-compiling C:\Python27\Lib\site-packages\zxing\__init__.py to __init__.pyc
running install_egg_info
Removing C:\Python27\Lib\site-packages\zxing-0.1-py2.7.egg-info
Writing C:\Python27\Lib\site-packages\zxing-0.1-py2.7.egg-info
3、这里看到zxing被安装到了C:\Python27\Lib\site-packages\zxing
将core-3.3.3.jar、javase-3.3.3.jar、jcommander-1.72.jar复制到:\Python27\Lib\site-packages\zxing这个目录下
3、修改上面路径下的__init__.py文件
libs = ["javase/javase.jar", "core/core.jar"]
改为
libs = [r"C:\Python27\Lib\site-packages\zxing\javase-3.3.3.jar", r"C:\Python27\Lib\site-packages\zxing\core-3.3.3.jar", r"C:\Python27\Lib\site-packages\zxing\jcommander-1.72.jar"]
loc = ".."
改为：
loc = ""
for result in file_results:
lines = stdout.split("\n")
改为
for result in file_results:
print result
lines = stdout.split("\n")
4.运行tests即可输出
E:\python-zxing\zxing>tests.py
file:///E:/python-zxing/zxing/sample.png (format: QR_CODE, type: URI):
Raw result:
http://tinyurl.com/openmichiganrsvp
Parsed result:
http://tinyurl.com/openmichiganrsvp
Found 4 result points.
Point 0: (75.5,273.5)
Point 1: (75.5,75.5)
Point 2: (273.5,75.5)
Point 3: (246.5,246.5)
注意，如果你自己使用时，识别的图片路径是绝对路径，会报错：
from zxing import *
import sys
def test_codereader(image_path):
zx = BarCodeReader()
barcode = zx.decode(image_path)
print barcode.data
if __name__=="__main__":
test_codereader(sys.argv[1])
E:\>python mywork.py e:\pic\sample.png
报错：
Exception in thread "main" java.lang.IllegalArgumentException: URI is not hierarchical
at java.base/sun.nio.fs.WindowsUriSupport.fromUri(WindowsUriSupport.java:122)
at java.base/sun.nio.fs.WindowsFileSystemProvider.getPath(WindowsFileSystemProvider.java:93)
at java.base/java.nio.file.Path.of(Path.java:203)
at java.base/java.nio.file.Paths.get(Paths.java:97)
at com.google.zxing.client.j2se.CommandLineRunner.expand(CommandLineRunner.java:112)
at com.google.zxing.client.j2se.CommandLineRunner.main(CommandLineRunner.java:76)
你只需要改变一下传入路径，变为：
E:\>python mywork.py file:/e:/pic/sample.png
file:/e:/pic/sample.png (format: QR_CODE, type: URI):
Raw result:
http://tinyurl.com/openmichiganrsvp
Parsed result:
http://tinyurl.com/openmichiganrsvp
Found 4 result points.
Point 0: (75.5,273.5)
Point 1: (75.5,75.5)
Point 2: (273.5,75.5)
Point 3: (246.5,246.5)
http://tinyurl.com/openmichiganrsvp
所有py文件代码:
__init__.py:
########################################################################
#
# zxing.py -- a quick and dirty wrapper for zxing for python
#
# this allows you to send images and get back data from the ZXing
# library: http://code.google.com/p/zxing/
#
# by default, it will expect to be run from the zxing source code directory
# otherwise you must specify the location as a parameter to the constructor
#
__version__ = '0.3'
import subprocess, re, os
class BarCodeReader():
location = ""
command = "java"
libs = [r"C:\Python27\Lib\site-packages\zxing\javase-3.3.3.jar", r"C:\Python27\Lib\site-packages\zxing\core-3.3.3.jar", r"C:\Python27\Lib\site-packages\zxing\jcommander-1.72.jar"]
args = ["-cp", "LIBS", "com.google.zxing.client.j2se.CommandLineRunner"]
def __init__(self, loc=""):
if not len(loc):
if (os.environ.has_key("ZXING_LIBRARY")):
loc = os.environ["ZXING_LIBRARY"]
else:
loc = ""
self.location = loc
def decode(self, files, try_harder = False, qr_only = False):
cmd = [self.command]
cmd += self.args[:] #copy arg values
if try_harder:
cmd.append("--try_harder")
if qr_only:
cmd.append("--possibleFormats=QR_CODE")
libraries = [self.location + "/" + l for l in self.libs]
cmd = [ c if c != "LIBS" else os.pathsep.join(libraries) for c in cmd ]
# send one file, or multiple files in a list
SINGLE_FILE = False
if type(files) != type(list()):
cmd.append(files)
SINGLE_FILE = True
else:
cmd += files
(stdout, stderr) = subprocess.Popen(cmd, stdout=subprocess.PIPE, universal_newlines=True).communicate()
codes = []
file_results = stdout.split("\nfile:")
for result in file_results:
print result
lines = stdout.split("\n")
if re.search("No barcode found", lines[0]):
codes.append(None)
continue
codes.append(BarCode(result))
if SINGLE_FILE:
return codes[0]
else:
return codes
#this is the barcode class which has
class BarCode:
format = ""
points = []
data = ""
raw = ""
def __init__(self, zxing_output):
lines = zxing_output.split("\n")
raw_block = False
parsed_block = False
point_block = False
self.points = []
for l in lines:
m = re.search("format:\s([^,]+)", l)
if not raw_block and not parsed_block and not point_block and m:
self.format = m.group(1)
continue
if not raw_block and not parsed_block and not point_block and l == "Raw result:":
raw_block = True
continue
if raw_block and l != "Parsed result:":
self.raw += l + "\n"
continue
if raw_block and l == "Parsed result:":
raw_block = False
parsed_block = True
continue
if parsed_block and not re.match("Found\s\d\sresult\spoints", l):
self.data += l + "\n"
continue
if parsed_block and re.match("Found\s\d\sresult\spoints", l):
parsed_block = False
point_block = True
continue
if point_block:
m = re.search("Point\s(\d+):\s\(([\d\.]+),([\d\.]+)\)", l)
if (m):
self.points.append((float(m.group(2)), float(m.group(3))))
return
if __name__ == "__main__":
print("ZXing module")
tests.py:
#!/usr/bin/env python
from zxing import *
zxing_location = ".."
testimage = "sample.png"
def test_barcode_parser():
text = """
file:/home/oostendo/Pictures/datamatrix/4-contrastcrop.bmp (format: DATA_MATRIX, type: TEXT):
Raw result:
36MVENBAEEAS04403EB0284ZB
Parsed result:
36MVENBAEEAS04403EB0284ZB
Also, there were 4 result points.
Point 0: (24.0,18.0)
Point 1: (21.0,196.0)
Point 2: (201.0,198.0)
Point 3: (205.23952,21.0)
"""
barcode = BarCode(text)
if (barcode.format != "DATA_MATRIX"):
return 0
if (barcode.raw != "36MVENBAEEAS04403EB0284ZB"):
return 0
if (barcode.data != "36MVENBAEEAS04403EB0284ZB"):
return 0
if (len(barcode.points) != 4 and barcode.points[0][0] != 24.0):
return 0
return 1
def test_codereader():
#~ zx = BarCodeReader(zxing_location)
zx = BarCodeReader()
barcode = zx.decode(testimage)
if re.match("http://", barcode.data):
return 1
return 0
if __name__=="__main__":
test_codereader()