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I'm surprised they didn't try losslessly optimizing PNGs with optipng and advancecomp. Optipng in particular can result in some pretty significant size reductio
by discreditable 9y ago
I'm surprised they didn't try losslessly optimizing PNGs with optipng and advancecomp. Optipng in particular can result in some pretty significant size reductions in my experience.
- masklinn 9y agoThey're working with photos, PNG is not really useful for photos, the DEFLATE algorithm doesn't work with "noisy" data.
- pyre 9y agoPresumably the noisiest PNGs were they ones that they converted to JPG in the section "Large PNG Detection."
- discreditable 9y agoThey specifically mentioned that they have PNGs of logos that they avoid converting if they're <300kb. Optipng would work well on the images that they keep in PNG format.
- floatboth 9y agoThey should try just compressing them with mozjpeg anyway, since mozjpeg has deringing https://calendar.perfplanet.com/2014/mozjpeg-3-0/ https://calendar.perfplanet.com/2014/mozjpeg-3-0/ it's actually not bad for text/cartoons/other things with high-contrast edges