Hi,
I was editing one image and noticed that the export looks different (nothing new in the color management). Seems to be an issue in the color management setup, but it happens (as far as I can tell) for ONE image only, which is weird: DSC_1243.NEF (20.2 MB) DSC_1243.NEF.xmp (18.8 KB)
My monitor is Asus ProArt 24" set to sRGB preset mode, this is the color profile after calibration: (I installed it as system default)
Any idea what could be wrong? Perhaps the problem is in some dt module if all other images that I checked look the same in dt and XnView? Vivaldi browser looks same as XnView.
If you export downscaled, and high-quality resampling is off, the image is downscaled to the destination size as soon as possible, which may affect colour and contrast. As long as the export is at a size close to your zoomed-out darkroom preview, you should get something close to the darkroom.
If the setting is on, the image is processed at full resolution, and downscaled as the last step. This may not match the zoomed-out darkroom view.
If no downscaling is applied (full-resolution export), the value of the setting is not important.
In the darkroom, you can enable full-resolution processing (at the expense of performance).
One thing to check if it’s a colour-management issue or a resolution/scaling-related one is to reimport the exported JPG into darktable. If it looks much like the original darkroom preview → there is some colour management issue. It it looks different → scaling could be causing the difference.
In the darkroom, with full-resolution processing off (left) vs on (right):
So, I’d say it’s the scaling, not a colour-management issue. Note that I made the darktable window much smaller than when I normally edit, because that makes the effect stronger. The effect is present in full-screen mode on my 4K display as well, but is less pronounced:
You can also enable the use of LCMS2 for applying the output profile, and try using a v4 sRGB profile that supports perceptual intent (@priort has done that often). Compare these two:
Re-imported JPG looks different but full-resolution processing doesn’t make much difference for me. Original dt darkroom look is still (slightly), but noticeably warmer even in full-res processing.
Oh, you meant “enable” as in “go to darktable settings” and not “go download it”, sorry
So I just set it as export profile like this? (I already enabled the setting in dt)
Should I change anything else?
Are you using second display? Darktable color management is buggy on windows, set to system display profile it’s ALWAYS using profile of primary monitor.
Two comments. The appearance profile has less of a difference between rendering intents when exporting than does the other profile at color.org. The one called perceptual… Also Xnview can display with a perceptual and relative setting in its color management settings. You might have to go to the next image and come back to get it to kick in once you change but you will see the difference…it also has a black point compensation setting. For me when I export to relative rendering on my JPGs… setting xnview to no BP compensation and perceptual seems to be a perfect match with DT preview…I manually enter my display profile also in DT and Xnview just to be sure everything is in sync.
I do just incase. If it’s your os system profile they should pick it up but I have heard of some situations where people claim software ignores system profile and uses no color management…not DT but nevertheless when I specify I am certain…
Yes at least in my opinion and then I set that for the OS as well… you seem to have a different profile in the OS but that might be due to the way your monitor works… You are also using gamma 2.4 for your profile and then exporting to sRGB which would be 2.2 and then opening that in xnview with 2.4 now but maybe it wasn’t before when you had it set to system so maybe the gamma difference might have come in to play…not sure…I’m only half a coffee in and really there are others that could comment on setting up your display with gamma 2.4 and exporting to 2.2…and how viewing that vs the original might be impacted…I am on my phone but I will take a look later at your image and see if I see that on my end …
PS just note in xnview if you make a change you might have to go back and forth a couple of times between image to get the change to kick in…
Well, I just put it in the name, because when I was using a Rec709 mode that allow gamma changes 2.4 looked “better”, but sRGB mode of the monitor doesn’t allow changes, so I assume it’s 2.2 (idk why I put it in the name… I calibrated in sRGB mode as far as I know)