[Digikam-users] Black and white images

[Brice Boyer]

Hello
I agree with david. Of course, B+W converstion can be adjusted/reworked on
the PC. But most dslr have *many* ways to do B+W and especially when you
shoot monochrome, it is nice to see your result on the spot. The good thing
about raw picture is that none of the adjustment is done to the raw file
(but it is of course done to the jpeg file if you shoot raw+jpg). So if you
are not using a proprietary software, your raw file will never be decoded
just like your camera would have done.
Maybe it would be good if digikam could try and mimic these in this aspect
but I think it is really difficult. It has to be able to decipher the exif
tags (what exiv2 does not fully do) and then apply camera settings for
accentuation, constrast, luminosity, filter, turn (reading my b+w menu)  and
then reproduce the effect accordingly. You will never get the same result
your camera/official software internal opaque magic would have produced and
I'm not sure it's worth the effort: you can do it yourself... Perhaps not
with digikam that is not meant for raw photography but rawtherappee ?
(rawstudio, gimp,... ?)
cheers

brice
PS @ vasilis : some cameras do not produce almost random B+W images... ;)

2010/1/29 Vasilis Yiannakos <billyiannakos at gmail.com>

>  I would strongly recommend to do the B&W convertion ON THE PC! Every
> digital camera has only one single way to convert color to B&W. On the other
> hand, when you work on your PC you have numerous different ways to achieve
> the exact result YOU want, and not the one -almost randomly- generated by
> the camera....
>
> ------------------------------
>
>
> Vasilis Yiannakos Photography
> photography(at)yiannakos.gr
> www.yiannakos.gr
> Athens, Hellas
> ------------------------------
>
>
>
>   On Thu, 2010-01-28 at 11:24 +0100, Gilles Caulier wrote:
>
>
> 2010/1/28 davidvincentjones <davidvj at verizon.net
> >:
> >
> > 3. Adjusting the curve in the Color> B/W operation is not as sophisticated
> > as in the Color> Curves-Adjust ... it would be noce to have some consistancy
> > in this area.
>
> Hum. As operation are preprocessed to convert RGB to B&W, and curve
> applied to B&W, this is a non sence to have RGB curves there.
> Typicialy, curve is just to adjust brighness for high/middle/low
> levels.
>
> Gilles
>
>
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