How to tag faces with Digikam and read them in Pigallery2?

[v-marinkov]

I tag faces in Digikam using the face regions and I have enabled writing to XMP sidecards. In Pigallery2, however, names only come up as tags and searching for people:"First Last" yields no results. What is the correct way to tag faces, so that Pigallery2 can read them?

[bpatrik]

Sidecars are not yet supported. You need to write the xmp data to the image file itself.

…

-- Sorry for being brief, sent from my phone.

On Thu, 16 Mar 2023, 13:56 v-marinkov, ***@***.***> wrote: I tag faces in Digikam using the face regions and I have enabled writing to XMP sidecards. In Pigallery2, however, names only come up as tags and searching for people:"First Last" yields no results. What is the correct way to tag faces, so that Pigallery2 can read them? — Reply to this email directly, view it on GitHub <#644>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABZKA5TXAY2LR2PGKDH56TTW4MEWZANCNFSM6AAAAAAV5FRVKU> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[v-marinkov]

Thanks for the quick reply, but even then - how should faces be written so Pigallery can recognise them? If I use the face rectangle/detection function of Digikam, Pigallery just sees tags for the name, not even "People/Name". What fields is "people: keyword" searching for and how to populate the Faces tab of Pigallery.

[v-marinkov]

Never mind, I had to ask Digikam to save faces data to files by checking the option Configure / Metadata / Behaviour / Face Tags (including face areas)

[hajo62]

I did the same for many of my photos.
Suddenly the Faces-tab does not display faces anymore, but the single photos still have and show the faces tags.
Maybe you have an idea?

I have opened an issue #656 for this...

[nk9]

There's a setting called "Face Tags (including face areas)" in the Metadata section of digiKam. (See DK docs.) If you enable this, DK will start to write the face regions to the files themselves. That way, they will be available for piGallery2.

One caveat: DK doesn't seem to save these regions to the files unless you create them with the setting on. Sometimes the rectangles are saved when you use "Album > Write Metadata to Files", but it seems very hit-or-miss.

[rhatguy]

Adding this here in case anyone else comes looking for a similar solution. You can use exiftool to copy faces from XMP files into the original JPG with a command like the below. I previously used digikam but have since moved to Mylio for the actual face tagging. Mylio only writes to XMP, but I can simply copy any face written by Mylio back into the JPG and PiGallery2 reads them without any issues.

exiftool.exe -r -ext jpg -overwrite_original -tagsfromfile %d%f.xmp -all:all -wm cg c:\test