ZXing or “Zebra Crossing” is an open source multi-format 1D/2D barcode image processing library that’s been implemented in Java, and also comes with ports to other languages. It currently supports the following formats:
UPC-A and UPC-E
EAN-8 and EAN-13
Code 39
Code 93
Code 128
ITF
Codabar
RSS-14 (all variants)
RSS Expanded (most variants)
QR Code
Data Matrix
Aztec ('beta' quality)
PDF 417 ('alpha' quality)
MaxiCode
ZXing is made up of several modules, including a core image decoding library, JavaSE-specific client code, and Android client Barcode Scanner. It is the basis of many other third-party open source projects.
A standalone, large scale, open project for 2D/3D image processing
...PCL is cross-platform, and has been successfully compiled and deployed on Linux, MacOS, Windows, and Android. To simplify development, PCL is split into a series of smaller code libraries, that can be compiled separately. This modularity is important for distributing PCL on platforms with reduced computational or size constraints.