[digiKam-users] Extract face images

[Liam Gretton]

Hi,

I'm trying to create a picture mosaic using the face images from 
digiKam. It looks like digiKam can mostly do what I want from the Tools 
-> Image Mosaic Wall function (though I can't find anything about this 
in the documentation).

What I want to do is make a mosaic from the images of a person's face, 
and all those images are already captured by digiKam in the faces 
section. However there doesn't seem to be a way to save the images from 
the face tags, but I think I've worked out how to extract them from the 
recognition.d SQLite database:

SELECT embedding FROM FaceMatrices WHERE identity=x

Assuming I've even found the correct data, I can't work out what this 
image data format is.

So my questions are:

1. Is there a simpler way of gathering the facial images that digiKam 
has already collected?
2. If not, how can I convert the binary image data from the recognition 
database into something useable?

Thanks,

Liam
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