Java based client to view remote jpeg 2000 using jpip protocol. this is a simple java viewer to allow:

- scale up request: enlarge the window
- roi request: select a region by mouse click and drag, then click inside the
red frame of the selected region
- annotate image with roi information in xml metadata: click button "region
of interest"
- open a new window presenting an aligned image with a locally stored image:
click button "image registration" (under construction)