ZBar Bar Code Reader is an open source software suite for reading bar codes from various sources, such as video streams, image files and raw intensity sensors. It supports EAN-13/UPC-A, UPC-E, EAN-8, Code 128, Code 93, Code 39, Codabar, Interleaved 2 of 5, QR Code and SQ Code.
Included with the library are basic applications for decoding captured bar code images and using a video device (eg, webcam) as a bar code scanner. For application developers, language bindings are included for C, C++, Python 2 and Perl as well as GUI widgets for Qt, GTK and PyGTK 2.0.
Zbar also supports sending the scanned codes via dbus, allowing its integration with other applications.
Check the ZBar home page for the latest release, mailing lists, etc.:
License information can be found in COPYING.
See INSTALL.md for generic configuration and build instructions.
The scanner/decoder library itself only requires a few standard library functions which should be available almost anywhere.
The zbarcam program uses the video4linux API (v4l1 or v4l2) to access the video device. This interface is part of the linux kernel, a 3.16 kernel or upper is recommended for full support. More information is available at:
pkg-config is used to locate installed libraries. You should have
installed pkg-config if you need any of the remaining components.
pkg-config may be obtained from:
The zbarimg program uses ImageMagick to read image files in many
different formats. You will need at least ImageMagick version 6.2.6
if you want to scan image files. ImageMagick may be obtained from:
The Qt widget requires Qt4 or Qt5. You will need Qt if you would like to use or develop a Qt GUI application with an integrated bar code scanning widget. Qt4 may be obtained from:
The GTK+ widget requires GTK+-2.x. You will need GTK+ if you would like to use or develop a GTK+ GUI application with an integrated bar code scanning widget. GTK+ may be obtained from:
The PyGTK 2.0 wrapper for the GTK+ widget requires Python 2, PyGTK. You will need both if you would like to use or develop a PyGTK GUI application with an integrated bar code scanning widget. PyGTK may be obtained from:
The Python bindings require Python 2. You will need Python and PIL if you would like to scan images or video directly using Python. Python is available from:
The Perl bindings require Perl (version?). You will need Perl if you would like to scan images or video directly using Perl. Perl is available from:
If required libraries are not available you may disable building for the corresponding component using configure (see configure --help).
The Perl bindings must be built separately after installing the library. see:
perl/README
make install will install the library and application programs. Run
zbarcam-qt or zbarcam to start the video scanner. Use zbarimg <file>
to decode a saved image file.
Check the manual to find specific options for each program.
In order to test if dbus is working, you could use:
$ dbus-monitor --system interface=org.linuxtv.Zbar1.Code
or build the test programs with:
$ make test_progs
And run: $ ./test/test_dbus
With that, running this command on a separate shell:
$ ./zbarimg/zbarimg examples/code-128.png
CODE-128:https://github.com/mchehab/zbar
scanned 1 barcode symbols from 1 images in 0.01 seconds
Will produce this output at test_dbus shell window:
Waiting for Zbar events
Type = CODE-128
Value = https://github.com/mchehab/zbar
Bugs can be reported on the project page:
Please include the ZBar version number and a detailed description of the problem. You'll probably have better luck if you're also familiar with the concepts from: