We have thought about using digital watermarking at the PRO. There seem at
least three problems - first, visible marking detracts from the image
quality. Invisible watermarking is possible - you can apply it in
Photoshop, but it seems a little bit pointless - it defeats the idea of
providing information about copyright. Second is the famous Alice and Bob
question. Alice watermarks her image and releases it to the web. Bob then
adds his copyright to Alice's image, so now there are two copyright marks on
the document. How can this be resolved? One way would be for Alice to
produce the original, unwatermarked image; this would only work if Alice not
only used digital watermarking, but had a carefully designed protocol
surrounding it. Third, some teenager sitting in a bedroom somewhere seems
to come up with a way of attacking each new watermarking scheme.
It would be good to hear others' views.
----- Original Message -----
From: "Archives" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, March 21, 2002 9:15 AM
Subject: Digital Images: copyright note
> Dear all,
>
> Just a general query as regards attaching copyright notice to a digital
> (scanned) image. I realise a copyright note outside the frame of the
image
> is often scanned as a way of enforcing copyright, though this can be
easily
> cropped by a user. Are any offices using watermarks or in any other way
> marking the copyright note onto the actual image? A tricky one.
>
> Many thanks,
>
> Jude Dicken
> St George's Chapel Archives
|