GIMP Version: 2.6.8
Operating System: Windows
OS Version: XP - SP3
GIMP Experience: Intermediate Level

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Hello,

Let's say I want to work within a specific color space (rgb 12 bits, 4096 colours), right ? But this color space is higher than 8 bits so I can't use the indexed mode and its palette functions. So my second guess is to use a color profile, but as I failed to find one (I only found 4096 PNG images..) It seems I'm stuck to create one but how do I do that? Aside from the typical calibrate-your-monitor, which, obviously, doesn't address my issue.

Please share your thoughts.. (:

Interessant!
But sorry, i don't know.
Seems very usefull!

Would Colors, Info, Smooth Palette... help?

I'm sorry Odinbc, I don't understand at all the sentence you just wrote

In Gimp Colors menu > select Info > select Smooth Palette...

I think you could use mathmap or a script to write a 64 x 64 image full of colours. Then, create a 4096 colour palette from the image. I think there was a plugin or something to get a palette from an image...

Nice found, never seen this menu before, unfortunately there's no precise control on the palette with this, you can end up with thousands or hundreds shades, this tool seems to approximate the posterization only.


I don't know about mathmap but there's indeed the import palette from image (built-in gimp feature, pretty much hidden BTW) but once I have my RGB12bits palette I can't convert any image into this palette because it's not an 8-bit palette..

So, best guess now would be to convert a palette into an ICC color profile.. Question remains (:

Color > Map > Palette map seems to work fine with >256 colour palettes.

edit. disregard, that plugin doesn't do what I thought it did.

Hmm, it might be possible to write a script to convert images to arbitrary palettes. It would have to compare every pixel against values in the palette, and match it to the nearest one. It might be a bit slow especially on larger images though.