Invisible digital watermark

[Gilles Caulier]

Very interesting. Please comment this entry in bugzilla accordingly :

https://bugs.kde.org/show_bug.cgi?id=268981

Thanks in advance

Gilles Caulier

2017-05-12 12:03 GMT+02:00 Simon Frei <freisim93 at gmail.com>:
> There is a G'MIC filter that embeds text in the fourier domain, it is
> called "Fourier watermark" (and "Fourier analysis" to retrieve the
> info): https://gmicol.greyc.fr/
>
> On 12/05/17 11:35, Gilles Caulier wrote:
>> 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
>
>