[Digikam-devel] reading lens description

Gilles Caulier caulier.gilles at gmail.com
Wed Jan 21 13:51:17 GMT 2009


2009/1/21 Matthias Welwarsky <matze at welwarsky.de>

> On Wednesday 21 January 2009 12:59:45 Matthias Welwarsky wrote:
> > On Wednesday 21 January 2009 09:41:30 Gilles Caulier wrote:
> > > ok. your new lens descriptio ntag for panasonic camera is recorded to
> > > DMetadata.
> > >
> > > Question : why you have set this change :
> > >
> > > +++ digikam-0.10.0-beta8/libs/dmetadata/dmetadata.cpp    2009-01-19
> > > 21:47:42.000000000 +0100
> > > @@ -105,7 +105,7 @@
> > >
> > >          if (identify.exposureTime != -1.0)
> > >          {
> > > -            convertToRational(1/identify.exposureTime, &num, &den, 8);
> > > +            convertToRational(identify.exposureTime, &num, &den, 8);
> > >              setExifTagRational("Exif.Photo.ExposureTime", num, den,
> > > false); }
> >
> > Because otherwise the exposure time shows up as "40s" instead of "1/40s".
> > Might be a speciality of this camera particular camera, or a bug in
> dcraw?
> >
> > However, ufraw does it correctly, and Marcel Wiesweg wrote:
> > > Thanks, but that's already fixed in SVN ;-)
> >
> > So I assume it's actually a digikam bug which is already fixed.
>
> Which reminds me of something: The aperture is also incorrectly read from
> these RAW files. A photo was shot with f/10, but digikam reports f/32. Is
> this
> also fixed already, by chance?
>

No. This is a problem in Exiv2 library which is used by digiKam to handle
Raw metadata.

Which version do you use ?

Note : digikam do not use dcraw to play with Raw image data, but libraw.

Gilles Caulier



>
> regards,
>         matthias
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