Face detection and recognition parameters

[Gilles Caulier]

Well it's simple: Pierre needs to run the 8.6.0 Linux AppImage bundle or
the Windows installer 8.6.0 that we provide...

Best

Gilles Caulier

Le jeu. 20 mars 2025 à 13:31, Michael Miller <michael_miller at msn.com> a
écrit :

> Hi Pierre,
> This is what I suspected.  digiKam needs OpenCV version 4.10.0 or later
> for face recognition to work properly.
>
> Please let us know if you need help upgrading to OpenCV 4.10.0.  I think
> Gilles or Maik can help.
>
> Cheers,
> Mike
>
>
> On Mar 19, 2025, at 11:27 PM, Pierre DELGOVE <dp8700 at zaclys.net> wrote:
>
> Hi Michael,
>
> LibOpenCV version is 4.6.0
>
> Regards.
>
> Pierre
>
> Le 2025-03-19 14:05, Michael Miller a écrit :
>
> Hi Pierre,
> To what version of OpenCV digiKam is using, go to Help->Components
> Information->Libraries->LibOpenCV.
>
> Cheers,
> Mike
>
> On Mar 19, 2025, at 8:22 AM, Pierre DELGOVE <dp8700 at zaclys.net> wrote:
>
> Hi Michael,
>
> I saw yesterday that the 8.6.0 was just released. I have to update it.
>
> I'm using KDE Neon with KDE 6.3.
>
> "What version of OpenCV is installed?"
>
> I don't know. I have to check it later (I'm not in front of this computer
> by now).
>
> How do I check which version of OpenCV is used (if it is correctly
> installed) ?
>
> Regards,
>
> Pierre
>
> Le 2025-03-19 11:02, Michael Miller a écrit :
>
> Hi Pierre,
> Please try using version 8.6.0.  It was released on 16 March. In version
> 8.6.0 we removed SSD, YOLO, and OpenFace from face detection.  YuNet and
> SFace are much more reliable.
>
> YuNet not detecting faces is usually because of an older version of OpenCV
> installed on your computer.  What operating system are you using?  What
> version of OpenCV is installed?
>
> Cheers,
> Mike
>
> On Mar 19, 2025, at 5:45 AM, Pierre DELGOVE <dp8700 at zaclys.net> wrote:
>
> Hi everybody !
>
> Due to the fact that Digikam Documentation is not quite up-to-date, I'm
> doing some tests using face detection, tagging and recognition in Digikam.
>
> I have some questions about this function :
>
> - about face detection algorithms, I've tested the three options (YuNet,
> YOLOv3 and the third one I don't remember about). Yunet does not detect any
> face although I ran it on a photo album full of faces (family photos). The
> different options (very small, small, medium sized, and so on) do not
> change the result. This algorithm is pretty useless in my opinion OR I
> missed something.
>
> YOLOv3 is very efficient and detect nearly every face in the photos.
>
> The third option provide the same results as YOLOv3.
>
> Question : is there an option to prefer between these two algorithms ?
>
> - about face recognition (after face tagging) and confirmation of a number
> of faces, there are two options in the settings : Sface and Openface.
>
> What are the difference between these options ?
>
> Is it possible to shift from one algorithm to another ?
>
> What are the consequences then ?
>
>
> It is said in the documentation that face recognition algorithms begin to
> recognise faces with a few tagged faces confirmed.
>
> I found that one needs to confirm much more than 10-20 tagged faces to
> have some reliable results in the people view.
>
>
> Thanks in advance for answering and helping.
>
> Pierre
>
>
>
>
>
>
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