Image/File Compression

hey /prog/, an inquiry here, for anyone who knows anything about image compression.
Long story short, me and a few other people are working on a hitbox/frame viewer for Guilty Gear, as well as extracting the Gallery images.
We've successfully extracted the images in binary form, but we can't make sense of them, there appears to be a compression on the images. Does anyone here have any experience in this field?
http://pastebin.com/16HMZzQY Here's a example if you want a quick look
http://www.mediafire.com/?rx88knqj4ym99ul here's a full bin if that helps more

>>50
The latter being a given until a contradiction is found.
No, axioms in mathematics are not a given, but a chosen. For instance, there's at least half a dozen different geometries in mathematics and they all have different sets of postulates. There is a mathematics without infinity too. And it's useless to ask which set of axioms is true, because they don't have to adhere to reality.
As opposed to physics where there can be multiple theories and hypotheses for a phenomenon but only the most experiment-agreeing of them survives and is adopted by the mainstream. E.g. there were lots of aether theories at the beginning of XXth century, but the special theory of relativity turned out to be the only one that passed all the empirical tests. Now aether theories are a relic of the past while the relativity theory is taught and used.