[Digikam-users] How to apply digital watermark

[gerlos]

On domenica 03 maggio 2009 17:05:44, Gilles Caulier wrote:
: > 2009/5/3 libu <lb.mailinglists at gmail.com>:
> > Yup, that it is :) ! Thanks m. !
> >
> > Do you know whether we can do this in a batch instead of 1 photo at a
> > time.
>
> Implemented in digiKam 0.11.0, where a new Batch Queue Manager have
> been added. A Batch tool can add visible Watermark...

Another nice thing to have is "invisible" watermarking, maybe including a 
"signature" through steganography, so a photographer can protect himself from 
abuse of his work: if you can see the watermark, you could also remove it 
(most times just cropping the image!).

Unfortunately, it seems that's there are really few tools to do these things 
released under GNU GPL...

http://en.wikipedia.org/wiki/Digital_watermarking
http://en.wikipedia.org/wiki/Steganography
http://steghide.sourceforge.net/
http://stegui.sourceforge.net/

best regards
gerlos