Open Geospatial Fundamentals
ImageJ Plugins - Digital Image Processing
These plugins extend the open source image processing software ImageJ with respect to fundamental applications in geoinformatics and surveying. While ImageJ isn't Photoshop - and is not meant to be -, it's quite a capable program, and thanks to a macro recording facility and a powerful Java API, it's much easier to extend. Being in the public domain, it's also free, and bugs are generally fixed quickly. The plugins below integrate well under Fiji or ImageJ2, too.
Download and install the latest version of ImageJ bundled with Java first (if not yet done).
Geometric Mappings. Understand basic image rectification techniques using control points. Learn to distinguish the proper use of affine, perspective and bilinear mapppings. Delaunay Triangulation and Interpolation. XYZ2DEM_Importer meshes and interpolates irregular distributed XYZ-coordinates. Find out more by exploring some exemplary data sets. Color transforms for image fusion. Explore how to merge satellite image data using IHS color transforms. These plugins are actually provided by Martin Schlüter, Hochschule Mainz University of Applied Sciences. If you would like to contribute to any of these efforts contact ijms3d.de please. The central place to look for more plugins including programming examples is part of the ImageJ web site.