OpenGL Mathematics (GLM)
A layer built on top of the Insight Toolkit (ITK)
Resize images and animated GIFs in Go
ArrayFire, a general purpose GPU library
A powerful cross-platform raw photo processing program
Swiss army knife of image processing
A collection of packages providing extra functionality for GNU Octave
Scan Tailor Experimental is an interactive post-processing tool
Scientific Visualisation Made Easy
Resilient Image Library - successor to DevIL
Tools for 3D image analysis of additively manufactured parts
A dithering software based around floats
itom - an Open Source Measurement, Automation and Evaluation Software
Image processing library in C/C++
ScanTailor Deviant - a fork based on Universal and Experimental family
ScanTailor Advanced is the version that merges STF and STE
ScanTailor Universal - a fork based on Enhanced+Featured+Master
JBIG2 Encoder
Optical music recognition library
Lenna: Open Source Image Processing Program
A Free Experimental System for Image Processing
Constantly summarizing open source dataset and critical papers