Description
While I took a computer course in image manipulation algorithms in Java in August 2003 at the XLAB Göttingen, I left a codebase back implementing these algorithms. These have now been tidied up and put into a library. This is nothing sensationary, just basic algorithms to experiment with.
The worst thing that could happen in this course was that it was designed to use Java as programming language. Really none of the participants knew Java, only C-style basics (which helped a lot!), it was just a matter of implementing the algorithms in Java. A "picture" class was already programmed in the past, however since Java was too much for me, I just reinvented that wheel in C, and made it a command-line tool to read and write PPM files, which could then be displayed using xv.
Since others will probably also take part in this course some day, and I am pretty sure they do not know all of Java either, I provide the established codebase, especially the picture handling, which cost me about 2 hours of the 3 days, as an aid.
This established code base, now known as libxlg currently has three parts: the picture handling XLG_pic, general filter handling XLG_filter and matrix storage XLG_matrix.
Matrices were about half of the whole course, so this got its own chapter. The library is very flexible in that about anything can be used interchangeably.
Further documentation
api_base.html - Basic functions
api_filter.html - Internal Filter API
api_matrix.html - Internal Matrix API
filters.html - List of filters
runner.html - LIBXLG COMMAND LINE LOADER