Installation

The zbar DLLs are included with the Windows Python wheels. On other operating systems, you will need to install the zbar shared library.

On Mac OS X:

brew install zbar

On Linux:

sudo apt-get install libzbar0

Install this Python wrapper; use the second form to install dependencies of the command-line scripts:

pip install pyzbar
pip install pyzbar[scripts]

Example usage

The decode function accepts instances of PIL.Image.

>>> from pyzbar.pyzbar import decode
>>> from PIL import Image
>>> decode(Image.open('pyzbar/tests/code128.png'))
[Decoded(data=b'Foramenifera', type='CODE128'),
 Decoded(data=b'Rana temporaria', type='CODE128')]

It also accepts instances of numpy.ndarray, which might come from loading images using OpenCV.

>>> import cv2
>>> decode(cv2.imread('pyzbar/tests/code128.png'))
[Decoded(data=b'Foramenifera', type='CODE128'),
 Decoded(data=b'Rana temporaria', type='CODE128')]

You can also provide a tuple (pixels, width, height), where the image data is eight bits-per-pixel.

>>> image = cv2.imread('pyzbar/tests/code128.png')
>>> height, width = image.shape[:2]
>>> # Considering just the blue channel
>>> decode((image[:, :, 0].astype('uint8').tobytes(), width, height))
[Decoded(data=b'Foramenifera', type='CODE128'),
 Decoded(data=b'Rana temporaria', type='CODE128')]

>>> # Converting to greyscale
>>> grey = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
>>> decode((grey.tobytes(), width, height))
[Decoded(data=b'Foramenifera', type='CODE128'),
 Decoded(data=b'Rana temporaria', type='CODE128')]

License

pyzbar is distributed under the MIT license (see LICENCE.txt). The zbar shared library is distributed under the GNU Lesser General Public License, version 2.1 (see zbar-LICENCE.txt).