I will check whether GD lib supports them. jp2 is 25% of the size of a jpg file so this is a considerable saving in traffic and storage requirement (beside the speed !)
http://en.wikipedia.org/wiki/JPEG_2000
In my case 80 KB versus 200 KB per image !!!
gdlib
www.libgd.org/
gdlib only supports png, jpeg
so the better choice would be agg!
www.antigrain.com
agg und php work together, no problem.
KDE desktop uses agg redering library. It is slightly slower but better!
Thank you !
jpeg2000 is opensource,
Bird