Invisible digital watermark

[Louis A. Turk]

On 05/13/2017 03:15 AM, Pat David wrote:
> Fourier watermarking is highly susceptible to being destroyed during
> resize operations, as the image scale and frequencies all shift pretty
> heavily.
> 
> Wavelets aren't patented per se, I think, but I still don't know that
> they are going to solve OP's question.
> 
> If you want a truly invisible watermark, don't share the image.  If you
> _must_ have something to "protect" you, then don't share the full
> resolution or raw file (you can always produce a higher resolution image
> or raw file to "prove" ownership.
> 
> Alternatively, creatively add your watermark directly into the image
> somewhere that won't be easy to notice, but might survive further editing.
> 
> Better still - maybe don't use a watermark at all? :)

If this be the case, then it would be best to remove talk about
watermarks from the documentation. Otherwise, users are led to believe
Digikam5 can do something it actually can't.

drl