I used darktable to reduce noise of a high ISO image. When I export that image as JPG (Quality 100), view it at 100% and compare the result to the image shown in darktable at 100% I can see that the exported JPG is not as soft as shown in darktable, but noisier/grainier.
You can see it in the screenshot I made, for example the structure of the white lines (on the left side you can see darktable and on the right the exported JPG).
Unfortunately I cannot share the whole image or raw file
When loading the exported JPG back in darktable I can see those noise/grain in darktable, too. So it does not seem to be related to the image viewer.
What can be the issue here?
- I export at the same size as the original RAW file.
- I use AMaZE as demosaic.
- I tried different export formats using different bit depth.
- The gamut check mode does not show anything, at least not in the mentioned white lines (see screenshot).