"Indexed" in Image->Mode is disabled.

[mid]

[b]GIMP Version:[/b] 2.10.14
[b]Operating System:[/b] Linux
[b]GIMP Experience:[/b] Basic Level

[b][hr][/b]
Excuse me if this is the wrong place.

I'm trying to turn an image into an indexed one, so that I can use it as palette to palettize other images, but the "Indexed" option in Image->Mode seems to be disabled. The image is currently "RGB color 8-bit linear integer". What can be the cause of this? I don't know what to search online either, my search terms are too vague.

[racer-x]

Works fine here. I'm using Gimp 2.10.12 AppImage in Linux Mint 19.3, FYI....

[mid]

I'm very confused, then. I'm using the default build provided in 5.4.2-1-MANJARO x86_64, which, AFAIK, uses the default Arch repositories. There's no reason for it to be disabled.

[racer-x]

Can you post the image in question?

You may also want to try this Gimp 2.10.12 AppImage with plugins: https://github.com/aferrero2707/gimp-ap ... 4.AppImage

[mid]

Here it is.

[mid]

It's disabled for me in your AppImage, too.

[rich2005]

The image is in 'linear' mode. Change to RGB Image -> Precision -> Perceptual Gamma (sRGB) Then you can go Image -> Mode -> Indexed

As far as I can see no difference as reported by colorcube in the colours.

rgb.jpg (114.22 KiB) Viewed 2685 times

There is a difference in the distribution of the colours in a palette.

indexed.jpg (102.15 KiB) Viewed 2685 times

[mid]

That did indeed fix the problem, thanks!

[SaltySoda93]

i just came across this issue, but this method didnt work for me. though i did manage to replicate the problem by running any image through Topaz Photo AI, so that may be very relevant
>>almost as soon as posting this, changing to 8Bit Integer did the trick