That's actually a bit of a tricky question and it depends heavily on the tradeoffs you are willing to put up with. As of OMERO Beta 4.3.0 users have had access to a set of techniques we call
FS Lite (
http://trac.openmicroscopy.org.uk/ome/ticket/5640). These techniques were developed as a mechanism to satisfy the
big image use case where the 2D (X/width and Y/height) dimensions of the image number in the 10's of thousands. 150,000 pixel square images are a concrete example of this. The file formats that were
FS Lite enabled in 4.3.0 were:
Part of the
FS Lite techniques are that each 2D plane of the image must be converted into a losslessly compressed (via JPEG-2000) image pyramid by the server before it can viewed. As we progressed through OMERO Beta 4.3.1 and 4.3.2 it became clear from user feedback that this image pyramid generation technique and thus
FS Lite was not something everyone who used the above file formats required exclusively. In OMERO Beta 4.3.2 we did two things to address the issue:
[list=]
[*]Put in place a configurable size criteria (
http://trac.openmicroscopy.org.uk/ome/ticket/6313)[/*]
[*]Made the list of FS Lite enabled file formats configurable (
http://trac.openmicroscopy.org.uk/ome/ticket/6313)[/*]
[/list=]
With that background in mind and depending on the dimensions of your JPEG files you could simply lower the size criteria on your server. This would ensure that all your data was subject to the
FS Lite techniques. The down side is per-2D plane read speeds from the JPEG-2000 compressed image pyramid that would be created are significantly slower than with uncompressed data. The advantage of course is that your source data would be losslessly JPEG-2000 compressed.
