my start in this brilliant forum is unfortunately a need for some help.
I used to process DNG files in ufraw for some years, but seeing development slowing down and the huge gap to rawtherapee and darktable, I started using rawtherapee some months ago.
I love the features, the handling etc. really nice piece of work, thank you for that.
However there are some light conditions I can not get the results I get in ufraw.
Camera is Pentax K7, rawtherapee version 5.5, ufraw 0.22.
Sample files under: https://www.dropbox.com/sh/2vx8jvhry2eetsb/AADwCYC83C5EvljorQT1jO_ya?dl=0
(the names of the jpegs indicate the processing software).
I found (by trial and error) that the Gamma 0.33 (default is 0.45) and linearity 0.06 (default is 1.0) works best, which became my standard. The rest is standard processing (base curve, color temp etc…). As a sharpening tool is missing in ufraw I do the sharpening batch wise (under Linux) with the command:
convert -unsharp 5x2+1+0 $foto
(which is: radius=5, Sigma=2, amount=1, threshold=0)
The result is in uth-007119_ufraw.jpg
the best I can get is uth-007119_rawtherapee.jpg. I tried the sliders in the white balance tab, the curve CH in the lab settings, the red channel in RGB channel mixer etc…
(the later in some cases shows good results by reducing from 100 to 98 (not in the sample picture)).
The result however looks weaker, with less contrast and somehow the green is not what I expected - compared to the ufraw version.
The sharpening is worse and the colors look a bit artificial.
I could not find anything like gamma setting or linearity in rawtherapee(?)
just for completeness, the result is not really fair, as I did not really get into darktable, this was just a quick test.
I assume that there is an issue with the import colors(?) Unfortunately I did not find any icc profile for Pentax K7, but read several times that “color matrix” works well - which is the setting in ufraw and rawtherapee.
Somehow I’m lost now and think I am going to a wrong direction…
Any hints, or is there anybody using a Pentax K7 color profile (input profile).