Hi Marius,
Unfortunately ROIs are not included in the OME-tiffs exported from OMERO. The only reason this feature is missing is because we haven't had time to implement it yet (and because we haven't had a lot of people ask for it, so it has not been top priority).
Now that you've asked for it, the priority is a lot higher!
One obstacle is that there is some divergence between the modelling of ROIs in OMERO and OME data model, due to practical reasons. Fixing this has been ticketed:
https://trac.openmicroscopy.org.uk/ome/ticket/4317All export tickets are listed here
https://trac.openmicroscopy.org.uk/ome/ticket/3535And I've just created a new one for ROI export
http://trac.openmicroscopy.org.uk/ome/ticket/6319 I'm afraid I can't give you any idea how long it is before we get this done,
Apologies for that,
Will