On water marks. I wanted to ghost my logo onto the image, as if lightly frosted on glass. The Decorate doesn't allow you to do this,.
On protection:
One form of protection when it comes to court would be the existence of other pictures from the same shooting session, uncropped originals from the same session.
I figured that one way to protect an image would be to overlay a 1 least significant bit fractal design over it.
The design needs to have broad elements, so that a casual smoothing or resizing doesn't destroy it. It also needs to have fine scale elements so that it's
still recognizable when severly cropped. In ascii art this is a 2 level example for Sherwood's Forests Tree Farms
SFTFS FTFSF SFTFSF FTFSF
S F T F
S F T F
SFTFS FTFS T FTFS
S F T F
S F T F
SFTFS F T F
Probably some work could be done to match the method to the style of file (E.g seems that a lot of jpeg stuff happens in multiples of 8? So parhaps putting
it on an 8 boundary will make it more persistent.
Working at multiple levels of detail makes it a lot more difficult to edit out.
On Sun, May 3, 2009 at 9:49 AM, gerlos <
[hidden email]> wrote:
>
> On domenica 03 maggio 2009 17:05:44, Gilles Caulier wrote:
> : > 2009/5/3 libu <
[hidden email]>:
> > > 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
> _______________________________________________
> Digikam-users mailing list
>
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--
Sherwood Botsford
Sherwood's Forests
Warburg, Alberta T0C 2T0
http://www.sherwoods-forests.com780-848-2548
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