Quick Response Codes

Branchenüblich ist auch der Begriff „Imager“, wenn es sich um ein 2D-Gerät handelt. Sie verfügen über eine Kamera und einen Decoder.

Linux:

libdecodeqr-dev - C/C++ library for decoding QR code
libdecodeqr-examples - Sample program in C/C++ library for decoding QR code
libdecodeqr0 - C/C++ library for decoding QR code

http://code.google.com/p/zxing/ Open Source, Java with ports in other platforms

http://fukuchi.org/works/qrencode/

Libqrencode is a C library for encoding data in a QR Code symbol, a kind of 2D symbology that can be scanned by handy terminals such as a mobile phone with CCD. The capacity of QR Code is up to 7000 digits or 4000 characters, and is highly robust.

https://github.com/mkoppanen/php-zbarcode

If you have the possibility to use a phpextension, php-zbarcode at https://github.com/mkoppanen/php-zbarcode can read qrcodes. It's a wrapper for ZBar from http://zbar.sourceforge.net, which in turn is a LGPL C library for decoding barcodes.

PHP extension for reading barcodes. Uses ImageMagick(http://www.imagemagick.org/) for image support and zbar(http://zbar.sourceforge.net/) for scanning the barcodes.

MS-WINDOWS only! http://blog.odoa.eu/post/QR-Code-Scanner-for-Desktop-and-Laptop.aspx