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I need to convert the colors used in an image to 12 bit depth (4096 color palette), as if I would watch the picture on an old rgb phone screen.
Background: I am playing around with a 32x32 LED matrix that is capable of showing 4096 colors and I try to let it display an animated png - and I want to setup the colors first.
You can use the Posterize adjustment in Photoshop to reduce it to 4096 colors very easily, but I don't know if that's true 12bit, or the exact palette of the LED matrix.
Set up an indexed palette then you have have it to those exact colours