[Digikam-users] RAW Brightness vs Curves

[Leonardo Giordani]

Hi all,

I would like to ask you about a strange effect that happens when converting 
RAW data; to help me explaining the situation I posted some images on

http://picasaweb.google.it/giordani.leonardo/DigiKam093#

Sorry but I'm using 0.9.3 since Ubuntu Hardy has not yet 0.9.5.

This is the problem:

I'm going to process a RAW image, you can see it in figure 01.

When I load it in RAW Image Converter it appears as in figure 02, WB is 
correct but brightness is a bit low.

If I raise brightness from 3.00 to 5.00 in RAW Image Converter I experience 
some quality issues: look at what happens in figure 03 to the background 
flowers (the yellow ones on the right): they seems to "spread".

If I convert the RAW image with brightness 3.00 (to 16 bit TIFF) and process 
it with Color->Curves..., just shifting up the middle point of the curve, I 
obtain what you can see in figure 04: foreground brightness is the same as 
before, but background quality is preserved.

Why does this happen? Is this an error of mine?

What about batch apply of Edit tools (like Curves) in 0.10.x or subsequent 
releases?

Thank you very much

Leonardo