[Digikam-devel] RAW mode decoding quality

[Caulier Gilles]

Le Mercredi 14 Juin 2006 22:31, Gerhard Kulzer a écrit :
> On Wednesday 14 June 2006 23:15, Caulier Gilles wrote:
> > Le Mardi 13 Juin 2006 10:33, Gerhard Kulzer a écrit :
> > > Hello Paco and Gilles,
> > > I probably missed some discussion on the subject during my absence (so
> > > I'm back): it looks to me that the quality factor selection has
> > > disappeared
> >
> > No, the raw quality setting is always here. It's more easy to understand
> > an algorithm name instead a simple number (0, 2, or 3 - 1 is not used
> > actually by dcraw)
> >
> > > from the settings menu and dcraw is now called with -q only
> > > (rawloader.cpp).
> > >
> > > To demonstrate the bad results we get  with this simplification I've
> > > composed an image with the same cutout from a raw file
> > > a) decoded with the thumbnail extraction facility dcraw -e
> >
> > You trying to compare an embeded JPEG image used to display picture on a
> > TV screen with a full quality RAW image (:=)))
>
> Yes and no. What I wanted to demonstrate is that the -q option seems to
> give the same resolution as the embedded thumbnail jpg (which is really
> astonishing). All the 3 examples of my attachment are crops from the 100%
> zoom sizes.
>
> > > b) with digikam
> > > c) with dcraw -q
>
>  actually I ment dcraw -q 3 as written on the picture.
>
> > It's the same, but unforget the ICC workflow in digiKam !
>
> I don't understand what you want to say here.

well, when you compare digiKam and dcraw, if digiKam color management is 
enabled, you need to reproduce this workflow with dcraw (look icc profiles 
options)

gilles