The images in the article are not optimized, so the comparisons are not meaningf... | Hacker News

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		edflsafoiewq on Sept 29, 2021 \| parent \| context \| favorite \| on: Dithered images and websites (2020) The images in the article are not optimized, so the comparisons are not meaningful. For example, my-dog-dithered.png which uses only black and white is stored as 4x8 bpp instead of 1bpp. Running it through optipng halves the size.

mark-r on Sept 29, 2021 [–]

That seems odd to me. Isn't PNG compression based on a LZW-type algorithm, making the bit count of the inputs irrelevant as long as you're only using two distinct values?

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