Re: reverse engineering thousands of colors mode?

>It sounds like the compression is patented in your examples, but what
about decompression, I dont see MPEG players or GIF readers worrying about
invading patents.

This is because the holders of these patents have chosen to license these
patents for certain uses at no fee.  It's an economic decision they have
made: it's the widespread availability of readers that makes the licenses
for encoders valuable.