Exported jpg from gimp, colours all wrong, what did I do?

[Thad_E_Ginathom]

I used to use GIMP daily, adjusting camera jpegs. For some time I’ve been using darktable to edit raw instead.

But now I want to do some simple cropping and maybe I can’t resist just a tiny tweek to brighten the highlights. I’ve always found GIMP to be quick and easy for this stuff. Today something weird is happening.

The input is a jpeg export from darktable, and looks fine in the GIMP window displayed. exported in jpeg it looks like the image on the right seen in gimqv

I have used only crop and curves.

‘Export as’ to jpg, 80ish (memory dim) %

(Gimp is 2.10.38, running on linux Mint 21. darktable is 4.9.1).

I’m thinking it must be something obvious to those who can see it!

screenshot:

Feeling stupid. Help?

[Ofnuts]

If I reapply the gamma correction to your image, I get this:

So how did you load the image in Gimp? Did you convert to high precision and/or to a color profile and what options did you pick?

[anon8280290]

see GIMP 2.10.34 export suddenly dark - solved - #4 by xpatUSA

[Thad_E_Ginathom]

@Ofnuts

So how did you load the image in Gimp?

A simple file-manager open-with. And I don’t think I ever changed any of the default options

@anon8280290

see GIMP 2.10.34 export suddenly dark - solved - #4 by xpatUSA

@anon8280290

Problem solved: I had changed the import preference to “keep” the image’s built-in color profile. After changing it back to always convert to the GIMP built-in color profile, the image exported correctly from linear precision without going dark.

I don’t think that I changed it, but, iirc, the preferences are set to keep the image built-in profile. So I’ll head off and investigate that. Thanks!

[anon8280290]

@Thad_E_Ginathom

@anon8280290

Problem solved: I had changed the import preference to “keep” the image’s built-in color profile. After changing it back to always convert to the GIMP built-in color profile, the image exported correctly from linear precision without going dark.

I don’t think that I changed it, but, iirc, the preferences are set to keep the image built-in profile. So I’ll head off and investigate that. Thanks!

Yes, keeping the image profile but also having ‘linear’ selected in the precision options is what gave me the problem.

[Thad_E_Ginathom]

haha feeling like a typical user! Inconsistent, don’t know what I did…

Well, I thought I had to keep the image set to keep profile: now I see it set to convert.

And the problem has gone away! I’ll just hope it stays away.

Thank you so much for your time

@anon8280290

having ‘linear’ selected in the precision options

Which screen is that on? It’s past my bedtime.

[anon8280290]

@Thad_E_Ginathom

@anon8280290

having ‘linear’ selected in the precision options

Which screen is that on? It’s past my bedtime.

[Thad_E_Ginathom]

Many thanks! I haven’t seen that one before. I’ll check it…

I have 32 bit and perceptual gamma as defaults