Better image optimisation by restricting the colour index | Eric Meyer

When optimising images with only a few visible colours, reducing the output colour space can have massive savings (Eric is talking about the Acorn software here):

When I clicked the “Index PNG Colors” checkbox and changed the slider until I started getting dithers or obvious color loss, then brought it up a notch or two, the difference was astounding. Instead of a 30KB file, I got a 4.4 KB file. Instead of saving at 75% the original size, it was now 11%.

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There's an idea at the core of Jeremy's thoughts here which struck a never, one that is best summed up in two quotes, one from Jeremy and another he quotes from Jamais Cascio (here given with Jamais […]

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