I’m open to using GIMP or a web-based online tool

I’d like to take a source image and posterize it, but instead of letting the application pick the resulting colors, I’d like to pick them manually. So for every pixel, the app would change the color to one of my chosen colors

  • tal@lemmy.today
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    3 months ago

    I don’t know if it’s identical to the posterize effect, but in GIMP, you can reduce an image to indexed color using a fixed, user-specified palette and then back to RGB.

    Image->Mode->Indexed…

    Set dithering to None. Hit OK.

    Image->Mode->RGB

    You might try adding a subsequent despeckle…I think that Posterize might do something along those lines as well.