Category Archives: tech

wavelet kompressor 2.1

wavelet.zip updated to version 2.1. it had serious bugs in the quality based quantiser-selection (one was related to not returning lossless “solutions” when they were asked for, the other very often returned large solutions, although better (i.e. smaller) ones were available).

slightly updated the wavelet code again… i had a little inspiration yesterday evening (well… it should’ve been the obvious thing to do): i now reorder the coefficients that were set to 0 (for non power-of-2 dimensions) to the end of the block. this improves compression on such images by about 0.7-1.2%. yey. and makes old images look odd. ^_^

updated the code page w/ the wavelet kompressor, made some (very minor) changes to the code and added documentation (i think that’s a first for me ;)!

working on a GUI for my wavelet compression for people to play around w/… should be done on monday! (but still haven’t put sensible comments into the code :-/)