GEDI (Groundtruthing Environment for Document Images) is a highly configurable document image annotation tool. Its basic structure involves two types of files, an Image file, and a corresponding .XML file in GEDI format. LAMP Univ of MD, College Park, MD
A unique python-based imageeditor with low-level control. It will be able to apply fairly complex mathematical operations to individual pixels based on the contents of a script or user input at a command line. It will then be able to apply those changes to the image for a unique effect.