I bet somebody in the biz has a pipeline for running different algorithms/formats/compressions, and applying different metrics for "would these look about the s

I bet somebody in the biz has a pipeline for running different algorithms/formats/compressions, and applying different metrics for "would these look about the same to a human on a certain screen at a certain distance." > 1 BPP Yeah, the different ASCII characters might be best modeled/analogized as local dithering.