![]() Reducing the colormap size by one color should not, in itself, significantly affect the quality of the results, as a test with pngquant 255 will demonstrate. Nonetheless, just to play it safe, I've used -colors 255 for the examples above. *) In the comments below, it is suggested that -colors 255 is necessary "to reserve one entry for the 'background' color." Based on my testing, I have not observed this to actually be the case using -colors 256 will still produce an 8-bit colormapped PNG, with quantization artifacts qualitatively similar to, but differing in details from, the output with -colors 255. ![]()
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