[digiKam-users] People Vs person tag trees

[SampsonF]

Just finish scanning my photos.

I find there are two tag trees:  People and person .

What is the final one used by the Face detection and tagging?

Where I can learn more how to use Face detections and tagging in Digikam?



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[woenx]

For face detection and tagging it's the tree at the "People" panel at the
left. However, the "Tags" panel will also show face-tags as if they were
normal tags. I agree that it can be a bit confusing sometimes.

The normal procedure should be:

1) you scan the pictures for faces (either from the "People" panel or by
right-clicking an album and scanning it for faces. You can either just do
the face detection, or also face recognition.

2) When the scan finishes. Go to the "Unknown" tag in the "People" panel.
New detected faces will be there, and you can name them. After naming them,
you'll find those faces under the name you used in the People panel.

3) In case digikam recognized some faces, you have to check under each
person's name (there may be some unconfirmed ones).

And that's basically it. Face-tags should automatically be saved in the
metadata.



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[Timo Kaufmann]

On 19-04-01 12:12, woenx wrote:
> 1) you scan the pictures for faces (either from the "People" panel or by
> right-clicking an album and scanning it for faces. You can either just do
> the face detection, or also face recognition.
>
> 2) When the scan finishes. Go to the "Unknown" tag in the "People" panel.
> New detected faces will be there, and you can name them. After naming them,
> you'll find those faces under the name you used in the People panel.

I have always wondered: Is there some way I can tag a face as "Unknown
person"? As in "yes, that is a face but I don't know who that is".
Removing the face-tag is not ideal (for example it will reappear on a
full rescan) and naively tagging it as "Stranger" will throw off the
recognition algorithm.

[woenx]

No, I don't think that's possible at the moment. Actually, I encountered the
same problem and I opened a suggestion in the bug tracker a year ago:
https://bugs.kde.org/show_bug.cgi?id=392023

So maybe in the future.



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[hajo]

On Tue, Apr 2, 2019 at 3:51 AM Timo Kaufmann <[hidden email]> wrote:

On 19-04-01 12:12, woenx wrote:
> 1) you scan the pictures for faces (either from the "People" panel or by
> right-clicking an album and scanning it for faces. You can either just do
> the face detection, or also face recognition.
>
> 2) When the scan finishes. Go to the "Unknown" tag in the "People" panel.
> New detected faces will be there, and you can name them. After naming them,
> you'll find those faces under the name you used in the People panel.

I have always wondered: Is there some way I can tag a face as "Unknown
person"? As in "yes, that is a face but I don't know who that is".
Removing the face-tag is not ideal (for example it will reappear on a
full rescan) and naively tagging it as "Stranger" will throw off the
recognition algorithm.

I agree to this issue, I assume that without such function the concept of face recognition is rather useless for anything more than a few images.

One more question that just came up in this context: In my people tree (digikam 5.9), I see both an 'Unknown' and 'Unconfirmed' tag. Not sure whether 'Unconfirmed' is a legacy entry or whether it serves any purpose?

Logically, with my limited English skill, 'Unconfirmed' would be the faces that are not known to the algorithm and should be confirmed by the user. 'Unknown' are people that are confirmed not known, I.e. strangers, and be excluded from the AI learning in future runs. But as of 5.9, digikam places newly detected, unidentified faces into 'Unknown".

Forgive me please if this has changed significantly in 6.0, I haven't had the chance yet to test it since I like to stay with distro versions where possible.

[woenx]

I think it's still the same in 6.0, and, honestly, I have no idea of the
difference between Unknown and Unconfirmed if there's one. Maybe the former
is just for faces that have been detected in pictures, and the latter is for
faces that digikam thinks may belong to an existing person in your database,
as you just described?

Also, don't change digikam's language, or you'll find yourself with another
set of "unknown" tags in the other language.



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