Drawing in images?

[joakim]

I would like to draw a bounding box inside an image displayed in emacs.

Do I:

 a) use clever already existing way, unknown to me, or

 b) patch my imagemagic patch to support drawing operations within
 images displayed in Emacs, or

 c) non-existing way likelier to be accepted in Emacs, than b)?

The use-case is displaying a scanned image and selecting a region for
OCR, which will result in text that will later be processed in Emacs.
 
-- 
Joakim Verona