Import based on similarity

[Gilles Caulier]

Le ven. 12 sept. 2025 à 11:18, Remco Viëtor <remco.vietor at wanadoo.fr> a écrit :
>
> On vendredi 12 septembre 2025 10:27:02 heure d’été d’Europe centrale Benoît
> Barbier wrote:
> > Hello,
> >
> > Is it possible to import based on similarity, or is it better to import
> > everything, then update the fingerprints and find duplicates based on
> > similarity?
> >
> >
> > Thanks,
> >
> >
> > --
> > Benoît
>
> I think the fingerprints are required to determine similarity. So doing a
> similarity test *before* import would mean reading all files, calculate and
> store (where?) the fingerprints, and compare against the database.
> Then on import you will have to read all the files *again*...
>
> I don't think digikam offers the possibility to calculate fingerprints for
> files not in its database (so not yet imported).

Typically, the fingerprints must be calculated while downloading and
byte-array stored in the database, as with the similarity or the
maintenance tool.

This means that all files are backported in the collection. As the
fingerprints are already in the database, the user must go to the
similarity tool to review the duplicates items as usual.

Implementing this way is not too intrusive in source code. Tool to
compute the fingerprints on a set of images from the collection
already exists, It must be started at the end of downloading files
from the camera. This requires just a new checkbox in the Import tool
settings and the rules to start the job at the end of the import
process.

Voilà for the concept.

My best

Gilles Caulier