OpenGL Mathematics (GLM)
A powerful cross-platform raw photo processing program
A standalone, large scale, open project for 2D/3D image processing
ArrayFire, a general purpose GPU library
Tools for 3D image analysis of additively manufactured parts
Image processing library in C/C++
Optical music recognition library
A small C library for building user interfaces with C, XML and CSS.
Computer vision and image processing library for Qt.
LBP implementation in multiple computing platforms (ARM,GPU, DSP...)