Help! I tried removing the blurriness of this Apu illustration using Gemini, it did the job (almost). But what I'm trying to do now is to keep the intentional aliased (jagged, pixelated) sharp edges like all those hand-painted Apu that was drawn in MS Paint, it can be done in Photoshop via limiting the color so that any greys near the lineart can be turned to #000000 and those various color artifact on the green are replaced to one color (e.g. #678d40). I kinda reverse-engineering the illustration but I don't have Photoshop myself. Can't be bothered with Gimp tho it's another curve to learn.