OTB is an open-source C++ library for remote sensing images processing
OpenGL Image Processing LIBrary
Bildster is an image processing library for educational purposes.
Image processing suite for Electron Microscopy
TurboSphere is an easy to learn and powerful JS based game engine.
A Library for Interactive Modelling and Visualisation
Heterogeneous Image Processing Acceleration (HIPACC) Framework
Computer vision and image processing library for Qt.
OpenCV library wrapper for Lua language
LBP implementation in multiple computing platforms (ARM,GPU, DSP...)