Oliver> Another thing is that some scanners are able to do a "batch
  Oliver> scan", that means the scanner does scan multiple images
  Oliver> while the scanhead moves over the page, so the scanhead is
  Oliver> not moved into start position every time.  But this can not
  Oliver> be used with the current sane standard.
I disagree.  sane_start() is a signal that the frontend is ready to
read the next image.  It does _not_ necessarily mean that the scanhead
should go back to its start position.
	--david
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