Try the CX_Monitor_weird.icc profile here: ColorWiki - Stunt Profiles
That will make it very obvious if the monitor profile is used or not.
And how can you be sure a Windows application running through Wine is correctly colour managed?
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Because what I see on screen and print is the same.
However - I made this folder ./config/darktable/color/out and put the screen profile CS240 there and a Epson Luster profile there - and they are now available in the dropdown menu. And when I switch between the system profile and CS240 nothing happens. At first I tought it just didnt work. But when I apply the Luster profile, there is very visible change. This I suppose means that darktable is actually using the CS240 profile when set to system. But why then is the difference between Darktabel and PhotoLine so significant? The photo is much colder and flatter in Darktabel.
Also, when I use the Luster profile and proof the image just turns blue - what is going on here?
Never mind about the proofing turning blue - gamut check was on. Sorry.
Is the profile also loaded into that viewer you run using Wine?
Alternatively, what happens if you set display profile to sRGB in darktable?
So, in PhotoLine, if I switch from system to the CS240 file (calibrated icc profile) (which is what Ubuntu 24 is set to use) - the image is indeed similar to the one I see in Darktabel. In PhotoLine I also have the oportunity to uncheck Activate Color Management. If I do that the image also becomes similar to the image in Darktabel. So the issue might actually be then, that when I activate Color Management in PhotoLine and select to use the system profile this is actually wrong.
When I use the sRGB profile in Darktabel this looks like the Image in PhotoLine with activated Color Manegement and system profile (not the CS240 which give an image similar to the one with same profile in Darktabel).
Also, and we dont need to discuss this, Im just mentioning it, Gimp displayes the image like PhotoLine with activated Color Manegement and system profile.
Does this mean that Darktabel is doing stuff right, and PhotoLine (and GIMP) is doing it wrong?
I guess I should test print from Darktabel to see what I get. What do I need to know when I print, I will print from Darktabel with a Epson SureColor P800? For some reason I am not able to set the deafults there as I have to assign som username and password I dont have (as far as I know).
As someone who uses this printer, I would avoid printing from DT. I do not completely understand the underlying issue, maybe someone can give a full explanation, it has to do with 1) paper profiles made using Win/Mac drivers(*) and 2) issues with CUPS.
Also, from a color managment perspective, do not assume what comes out of your printer is āaccurateā color wise. Meaning if the print is different from the screen, it does not indicate your screen/viewing software is the issue.
(*) = If you create your own paper profiles using high-end gear, this may work. If you are making those profiles, you probably are not posting questions about profiles here.
You likely want turboprint if youāre going to print with this printer. Or you can try and extract the PPD file from the win/Mac package and try and load that into cups.
I used to use TurboPrint, but after upgrading to Ubuntu 24 it wasnt able to centre images. I was told I needed to buy it again, at half price nonetheless, but stillā¦ Thats to much for to little. I do prefer a complete Linux workflow, but if thats the case Iāll rather just do the print job from the mac. I will test printing from DT shortly though.
When in darkroom mode and in the menu on the right hand side there is the option of āoutput color profileā - where I can set the export profile. What does this do? Is it related to the export settings in the left side menu?
Have you tried reading the manual?
output intent
The rendering intent for output/export. Rendering intent can only be selected when using LittleCMS2 to apply the output color profile (this can be changed in preferences > processing). If darktableās internal rendering routines are used, this option is hidden. For more details see rendering intent.
output profile
The profile used to render colors for output/export. The profile data will be embedded into the output file (if supported by the file format) allowing other applications to correctly interpret its colors. As not all applications are aware of color profiles, the general recommendation is to stick to sRGB unless you know what you are doing and have a good reason to do otherwise.
(darktable user manual - output color profile)
profile
The output color profile. Select āimage settingsā if you want the settings in the output color profile module of the individual images to be respected.
intent
This option lets you define the intent ā the way in which darktable will handle out-of-gamut colors. See rendering intent for a more detailed description of the available options.
(darktable user manual - export)
Not until now - sorry. The way I understand it then is that it is related to the export settings. It is the default but you can override the settings in the export settings in the left side menu.