[Digikam-users] How to add a vignette?

[Gilles Caulier]

2008/11/20 Arnd Baecker <arnd.baecker at web.de>

> On Wed, 19 Nov 2008, Martin wrote:
>
> > On Wed, 19 Nov 2008 19:18:02 -0000, Arnd Baecker <arnd.baecker at web.de>
> > wrote:
> >
> > > On Wed, 19 Nov 2008, gerlos wrote:
> > >
> > >> Hello everyone!
> > >> Does anybody know how to *add* a vignette or to darken borders in
> > >> digiKam? Or I have to use Gimp for these things?
> > >>
> > >> I'm using digiKam version 0.9.4.
> > >
> > > For 0.9.5 from svn (and I think for 0.9.4 as well),
> > > Image Editor/Enhance/Vignetting Correction
> > > might do what you want.
> > >
> > > Best, Arnd
>
> > The vignetting tool seems to be just for correcting unwanted vignetting
> ie
> > it lightens borders. I can'r see any way of reversing it so that it adds
> > vignetting by darkening borders.
>
> Yes, you are right....
>
> Actually, when playing around with it, I observed two issues:
> - negative radius: does not seem to have any effect?
> - when pressing "Defaults", the view is not updated.
>
> To come back to the originial question: For adding vignette,
> could this be realized by extending the range of any of the sliders
> (e.g. a negative density?) or do we need a checkbox
> for this "inverted" purpose?
>
> Unless there is a way to add vignette in some way,
> could you please file a new wish in the bug-tracker so
> that it is not forgotten?


Arnd,

yes, it's possible to add vignetting with current algorithm from this tool.
I have just limited slider for that, because... i cannot see why a
photograph want to _add_ vignetting to an image.

So it's a 5 mns fix to do (:=)))

Gilles
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