DSpacers,
Has anyone been able to make the media-filter process JPEG 2000 image
files? The current media-filter used by DSpace makes use of these libraries
as part of the Java Standard Edition. By default Java SE comes with support
for the basic image types: jpeg, gif, png, bit map, etc... However if you
install the Java Advanced Imaging Library (JAI) locally then the
appropriate plugins will be installed to support JPEG 2000 and TIFF. This
shouldn't require any code changes on the part of DSPace, but would require
a system administrator to locally install JAI.
http://download.java.net/media/jai/builds/release/1_1_3/INSTALL.html
However, I've been banging my head on this problem for a few days now and
I've never been able to get JAI to work. I've also not been able to find
any open source projects that process JPEG 2000 images using JAI. So, has
anyone been able to get this to work?
As a follow up to that question, I've been looking at the open source
projects which do process JPEG 2000 images. The big one that I've found is
Djatoka, we're running it locally and it's a tomcat java web app that can
process the JPEG images. They are not using JAI but instead using Kakadu,
which is a commercial library written in C. They have embedded the binaries
for all the major OS Platforms within the webapp and then load the
appropriate libraries for the particular platform. Then with a java wrapper
they are able to make calls out to the pre-build binaries. Kakadu is
normally a commercial product, however they do offer "Non Commercial" and
"Public Service" licenses which might work for DSpace.
Assuming that the JAI library does not actually work, If A&M we're to
develop a JPEG 2000 media filter that used the Kakadu would
DSpace/Duraspace be open to managing the public service or non commercial
license? I am assuming this would have to be a separate module that one
could optionally include as a maven dependency which would provide this
media-filter because the Kakadu license does restrict to "non commercial
uses" and some people use DSpace for commercially.
Scott--
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