https://github.com/polyconseil/zbarlight
A simple wrapper for zbar
https://github.com/polyconseil/zbarlight
python qrcode-reader zbar
Last synced: about 1 year ago
JSON representation
A simple wrapper for zbar
- Host: GitHub
- URL: https://github.com/polyconseil/zbarlight
- Owner: Polyconseil
- License: bsd-3-clause
- Created: 2014-12-12T13:23:04.000Z (over 11 years ago)
- Default Branch: master
- Last Pushed: 2024-06-22T11:59:44.000Z (almost 2 years ago)
- Last Synced: 2025-03-29T02:06:27.274Z (about 1 year ago)
- Topics: python, qrcode-reader, zbar
- Language: Python
- Size: 104 KB
- Stars: 165
- Watchers: 43
- Forks: 36
- Open Issues: 12
-
Metadata Files:
- Readme: README.rst
- Changelog: Changelog.rst
- License: LICENSE
Awesome Lists containing this project
README
ZbarLight
=========
``zbarlight`` is a simple wrapper for the zbar library. For now, it can read all zbar supported codes. Contributions,
suggestions and pull requests are welcome.
``zbarlight`` is hosted on Github at .
Installation
============
You need to install ZBar Bar Code Reader and its headers before installing ``zbarlight``.
On Debian
~~~~~~~~~
.. code-block:: console
$ apt-get install libzbar0 libzbar-dev
$ pip install zbarlight # you can also use setuptools directly
On Mac OS X
~~~~~~~~~~~
.. code-block:: console
$ brew install zbar
$ export LDFLAGS="-L$(brew --prefix zbar)/lib"
$ export CFLAGS="-I$(brew --prefix zbar)/include"
$ pip install zbarlight
On Windows
~~~~~~~~~~
Instruction can be found on .
How To use ZbarLight
====================
.. code-block:: python
from PIL import Image
import zbarlight
file_path = './tests/fixtures/two_qr_codes.png'
with open(file_path, 'rb') as image_file:
image = Image.open(image_file)
image.load()
codes = zbarlight.scan_codes(['qrcode'], image)
print('QR codes: %s' % codes)
Troubleshooting
===============
In some case ``zbarlight`` will not be able to detect the 1D or 2D code in an image, one of the known cause is that the
image background color is the same as the foreground color after conversion to grey scale (it's happen on images with
alpha channel). You can use the ``copy_image_on_background`` function to add a background color on your image.
.. code-block:: python
from PIL import Image
import zbarlight
file_path = './tests/fixtures/two_qr_codes.png'
with open(file_path, 'rb') as image_file:
image = Image.open(image_file)
image.load()
new_image = zbarlight.copy_image_on_background(image, color=zbarlight.WHITE) # <<<<<<<<<<<<<<<< Add this line <<<<
codes = zbarlight.scan_codes(['qrcode'], new_image)
print('QR codes: %s' % codes)
Some other cases without known solutions are show in the ``scan_codes()`` tests (search for the expected failures). Any
clues on these cases is welcome.