Integrated Vision Toolkit (IVT)
The Integrating Vision Toolkit (IVT) is a stand-alone easy-to-use, platform-independent open source C++ computer vision library with an object-oriented architecture. It offers a clean camera interface and a general camera model, as well as many fast implementations of image processing routines and mathematic data structures and functions. The IVT offers its own multi-platform GUI toolkit.
The IVT is open source software and hosted on sourceforge.