[Digikam-users] EXIF and RAW

[Caulier Gilles]

Le Mardi 31 Octobre 2006 21:19, Thorsten Schnebeck a écrit :
> Am Dienstag 31 Oktober 2006 19:09 schrieb Paul Waldo:
> > - When importing images from my CF card, only *.CRW files get
> > transferred. None of the *.THM files generated by the camera get
> > transferred.  Since these files are generated by the camera, I think of
> > them as part of the "digital negative".  Are they not needed for
> > anything?
>
> Not really. THM are small jpeg thumbnails of the raw image. But a much
> larger jpg thumbnail is also embedded into the rawfile. The metatags of raw
> and THM are nearly the same.  So, no need to collect the THM files.
>

The only thing than digiKam does with *.thm files from camera is to get the 
image from this file to render preview in camera interface. It's very fast.

If your camera don't provide *.thm files, a raw file preview extraction is 
used instead. 

Gilles