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February 16, 2022 02:29 pm GMT

Never use pixelation to redact text

Blurring and swirling are ineffective methods for obscuring mediathey once caught a sexual abuser of children by "unswirling' his faceand unredacting pixelated text is now an all-but-solved problem.

So there's an existing tool called Depix that tries to do exactly this through a really clever process of looking up what permutations of pixels could have resulted in certain pixelated blocks, given a De Bruijn sequence of the correct font.

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