Compression/Decompression relies on JAI-IMAGE-IO 1.2, and therefore only works on platforms supported by JAI-IMAGE-IO 1.2 - in partiuclar it does not work on Windows 64 bit and MAC OS X. See also by statements about JAI-IMAGE-IO alternatives in my previous post: https://groups.google.com/forum/?fromgroups#!topic/dcm4che/kxoryXjsidw