Invisible digital watermark

[Louis A. Turk]

On 05/12/2017 07:05 PM, Gilles Caulier wrote:
> 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
>>
>>

Thank you Gilles and Simon. Hopefully, the impossible may be possible
after all.

drl