Re: Duplicate images

[Sébastien Barthélemy <barthelemy crans org>]

Le dimanche 23 septembre 2007 �0:43 +0200, Lorenzo Milesi a �it :
> Bill Moseley ha scritto:
> > Version: 0.3.5-0ubuntu2
> >
> >
> > I have duplicate images in my collection that point to the same file.
> > Is there a way to clean those out of the database?
> >   
> There is a bug lost somewhere in the time! :)
> http://bugzilla.gnome.org/show_bug.cgi?id=169646
> Ciao

Hello

I'm wondering what the checksum duplicate should/would cover.

In the following scenario
1. I import some picture
2. I tag it, with "write metadata on file"
3. I re-import the initial picture by mistake.

after the step 2, the file on disk changed, therefore, comparing the
checksums at step 3  won't detect duplicate.


This is indeed an argument in favour of a policy "never modify the
picture".

Another solution would be to store a checksum of the initial file.

Yet another solution would to use a "picture content checksum",
independant of the file, the resolution etc... (gqview can find
duplicates according to a similarity measure, I don't know how this
works)

Another useful hint would be exif metadata, 2 pictures taken at the
exact same time with the same camera may be duplicates.


What do you think about this, will it be handled ?

cheers

SB