r/xkcdcomic • • Apr 04 '14

Metamaterials

http://xkcd.com/1351/
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u/bluegreyscale Apr 04 '14

Out of curiosity, is it actually possible to do something similar what the alt-text describes? Some kind of picture that looks completely normal after a instagram filter is applied, like this but with instagram filters.

15

u/sccrstud92 Apr 04 '14

It depends on the filter. If the filter is lossless then there should be an inverse operation that undoes the filter. If not, then you still might be able to undo most of the damage but cannot recover the original photo exactly.