Invisible digital watermark

[Gilles Caulier]

You cannot. Invisble watermark use wavelets encoding methods which are
patented in US and impossible as i know to code in open source...

Best

Gilles Caulier

2017-05-12 10:42 GMT+02:00 Louis A. Turk <louisaturk at firmanelohim.org>:
> How can I do invisible digital watermarking with digikam5 as mentioned
> here:
> https://docs.kde.org/trunk5/en/extragear-graphics/digikam/using-dam.html#using-dam-copyright
>
> How can I do a regular watermark?
>
> drl