I've got to second Scott on this. We created JP2000s from a collection of hundreds of large (up to 270 MB) and compressed TIFFs, and Djatoka/Kakadu didn't miss a beat.
I tried several other tools, including ImageMagick, trying to get the quality we needed while providing the best scriptable solution for a future workflow. After a couple of days with Djatoka/Kakadu, I just threw a lot of RAM at the process and stopped looking for anything better. The quality was there, the JP2000s were created quickly, and I didn't get any occasional random errors that I ran into with other tools.
From: Scott Prater [mailto:prater@...]
Sent: Tuesday, November 16, 2010 8:27 AM
To: nt526@...; Support and info exchange list for Fedora users.
Subject: Re: [fcrepo-user] JPEG2000 image format generation
We tried several years ago using ImageMagick, but the performance was
pretty poor. Shortly thereafter, we purchased a license for the Aware
image server and jp2000 utilities. That is what we currently use for
our production image processing. We are in the process, however, of
migrating our image processing workflow and server over to Djatoka,
which uses Kakadu under the hood.
Though we're still in the early stages of refining our image processing
workflow, so far we're pleased with the Kakadu libraries. If you're
willing to pay a little bit more, you can purchase the source code, and
tweak it even more.
Nigel V Thomas wrote:
> Hello all,
> We are in the process of trialling JPEG2000 (J2K) format for image streaming
> and have tried a few libraries for converting between our archival images
> (TIFF's) to J2K. We have tried, ImageMagick (using JasPer), OpenJPEG and
> Kakadu. Both opensource libraries, ImageMagick (JasPer) and OpenJPEG have
> problems converting larger TIFF's, Kakadu on the other hand seems to work
> well. However, the proprietary license for Kakadu may be an issue of us in
> the future.
> Have you had experience encoding using other libraries? What have you used?
> Nigel Thomas
> Digital Library Systems Developer
> University Library & Archives, J.B. Morrell Library University of York,
> Heslington, York
> web: http://tinyurl.com/dcd6a5