Face detection and recognition parameters

[Pierre DELGOVE]

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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