Black crush with activated soft-proof
When softproof is activated in the darkroom, blacks are crushed.
My monitor is profiled with an XYZ matrix. Eye of Gnome, Gimp and other applications do not show this behavior.
Could this be related to black point compensation, which cannot be turned on or off by the user in darktable?
If this is the case, I would like to kindly request an option to control black point compensation for soft-proofing.
I have tested this with and without LCMS2 in Adobe RGB and sRGB spaces.
Steps to reproduce:
1. Load an image. It is best to use an image with pronounced dark areas.
2. Enable soft-proofing
#4 Updated by Björn Sonnenschein almost 3 years ago
In case that this is caused by the fact that black point compensation cannot be turned off:
I have found a todo note in the source code stating that it is planned to implement a checkbox for blackpoint compensation into the softproof menu. I would like to give it a try and implement it by myself and make a patch, as I consider this a nice starting point to get a bit familiar with DT's source code. Could you please point me to a commit where some similar switch had been added to the GUI to give me some orientation? I could not find one by searching the git logs on my own, sorry.
#5 Updated by Björn Sonnenschein almost 3 years ago
- File CCXMW-B141PW4 #1 2016-07-14 19-40 sRGB F-S XYZLUT.icc CCXMW-B141PW4 #1 2016-07-14 19-40 sRGB F-S XYZLUT.icc added
ICC profile added. This is the one for my cheap notebook's screen, however the problem does also occur with my Dell UP2516D.