Denoising a photo with a very high ISO value


2506_Altstadt_Ebeltoft_0040.ORF.xmp (15.7 KB)

Here’s my proposal:
My first problem to tackle was chroma noise, so I was thinking about using the Wavelets-chroma only preset…

But that has a major side effect: it seems so absolutely destroy fine color details – I’d describe it a bleeding the chroma details. Taking an example from the other Playraw:

So I decided to use contrast equalizer chroma denoise preset and boosted it. I added hot pixels and also added what I’m guessing is the luma-only equivalent of wavelets denoise.

EDIT:
Darktable ignored denoising on export, I fixed the files.

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