update 2026-05-8: hello hackernews - whoops, yes, i should have filtered out the noise specks. thanks to kevinsync for the reminder.
this is not a power or bandwidth saving technique à la low tech magazine. it's principally aesthetic.
handy if you're running a site with pictures but you want everything to maintain a consistent aesthetic and colour scheme. might be better to just process the images and save them already dithered, but this way can be customized. (note that the original image is still there beneath the filter, and that's what gets loaded, so, again, this doesn't save bandwidth - but it also means users could vary the effect per theme or toggle it off)
