On Fri, 4 Sep 2009, Louis-Frédéric Feuillette wrote:
JPEG2000 uses arithmetic encoding to do the final compression step.
Arithmetic encoding has a higher compression rate (in general) than
gzip-9, lzbj or others. There is an opensource implementation of
jpeg2000 called jasper[1]. Jasper is the reference implementation for
jpeg2000, meaning that all other jpeg2000 programs must verify it's
output to that of jasper (kinda).
Jasper is incredibly slow and consumes large amount of memory. Other
JPEG2000 programs are validated by how many times faster they are than
Jasper. :-)
Bob
--
Bob Friesenhahn
bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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