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Bug #11928

color pixel artefacts with profiled denoise and blend mode HSV-Lightness

Added by Matthias Bodenbinder 3 months ago. Updated 3 months ago.

Status:
New
Priority:
Low
Assignee:
-
Category:
General
Start date:
01/12/2018
Due date:
% Done:

0%

Affected Version:
2.4.0
System:
other GNU/Linux
bitness:
64-bit
hardware architecture:
amd64/x86

Description

I see weird colored pixel when using profiled denoise and blend mode HSV-Lightness. The issue happens with non-local means as well as with wavelet. Using blend mode Lightness instead is fine. I have attached a screenshot of DT, the exported JPG, the raw and the xmp file.

I am using DT 2.4.0 on Manjaro Linux.

IMG_0263.CR2.xmp (3.94 KB) Matthias Bodenbinder, 01/12/2018 07:34 PM

IMG_0263.CR2 (30.7 MB) Matthias Bodenbinder, 01/12/2018 07:34 PM

Screenshot-darkroom- 2018-01-12 18-32-45.jpg (830 KB) Matthias Bodenbinder, 01/12/2018 07:35 PM

IMG_0263.jpg (7.67 MB) Matthias Bodenbinder, 01/12/2018 07:36 PM


Related issues

Related to darktable - Camera Support #11669: Noise Profile: Canon PowerShot G9 X Mark ii Fixed 07/09/2017

History

#1 Updated by Roman Lebedev 3 months ago

#2 Updated by Roman Lebedev 3 months ago

According to https://www.darktable.org/usermanual/en/blending_operators.html, "HSV lightness ... In contrast to blend mode “lightness” this mode does not involve clamping."
Might be bad noiseprofile fit?

#3 Updated by Matthias Bodenbinder 3 months ago

I made a quick&dirty test with my own noiseprofile. I used the gen-profile script and loaded the profile with darktable --noiseprofiles ./presets.json. It shows the same artefacts.

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