Is 8.6.0 face recognition supposed to handle animals?

[Frédéric Da Vitoria]

Hello Michael,

I decreased the slider to 5 and ran the scanner. It found half a dozen 
more dogs, no cats, and a few birds. And quite a number of completely 
irrelevant areas, just as you predicted. All in all, I consider that it 
is still worth it because it also recovered (and sometimes identified) 
hundreds of faces, so I'll leave this setting at this level.

BTW, I am amazed by how it manages to find faces in areas where only an 
ear or an eye are visible. This makes me think that it identifies 
animals not because they look like humans (the dogs which were 
identified did not look like humans, and of course neither did the 
birds) but that a few animal samples were incuded in the training. I 
guess no cats were included, which would explain why it did not find 
any, although cat faces are closer to human faces than dogs or birds.

Afterword: I tried to check on a subset of my pictures if decreasing 
detection accuracy would find cats. In the "Search in" tab, I checked 
some of the cat tags, set the accuracy to 4 and hit "Scan collection for 
faces". dK answered "Items scanned for faces: 0" and "Face found: 0". I 
don't understand "Items scanned for faces: 0" as the 5 tags I selected 
amount to more than 100 photos.

Regards,

-- 
Frédéric Da Vitoria


On 26/03/2025 19:21, Michael Miller wrote:
> Hello everyone,
> Face detection is optimized for human faces. It will occasionally 
> detect animal faces. You can try setting the detection accuracy slider 
> to 4 or 5 to see if it will detect more animal faces, but this will 
> also increase the number of false positives.
>
> Cheers,
> Mike
>
>
>
> Sent from my T-Mobile 5G Device
>
>
>
> -------- Original message --------
> From: Frédéric Da Vitoria <davito9w at free.fr>
> Date: 3/26/25 10:23 AM (GMT-08:00)
> To: digikam-users at kde.org
> Subject: Re: Is 8.6.0 face recognition supposed to handle animals?
>
> Thank you for your answer.
>
> I just checked, it detected only 2 dog faces, and it missed hundreds 
> of others, including more than 300 pictures of the 2 dogs it just 
> detected. So maybe face recognition works, but face detection isn't 
> very efficient? Anyhow, I'm going to tell him those dog's names and 
> hope it will find other occurrences.
>
> Regards,
>
> On 26/03/2025 18:01, Gilles Caulier wrote:
>> Hi,
>>
>> Here my dog's face is also detected and recognized if tagged 
>> previously. So, I think the model has been taught with domestic 
>> animals, at least. I don't test with cats anyways (no cat at home 
>> (:-)))...
>>
>> Best
>>
>> Gilles Caulier
>>
>> Le mer. 26 mars 2025 à 17:33, Frédéric Da Vitoria <davito9w at free.fr> 
>> a écrit :
>>
>>     Hello,
>>
>>     I updated to 8.6.0. In the unknown faces folder, I found 2 dogs.
>>     Should
>>     I tell dK to ignore them or is there any chance the new face
>>     recognition
>>     engine will recognise those dogs in the future?
>>
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