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Most technologies continue to improve with innovation, like WiFi. What is a technology that was nearly perfect upon conception? (sh.itjust.works)
submitted 1 year ago by to c/asklemmy@lemmy.ml
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[–] 15 points 1 year ago (6 children)

I don't think QR codes have changed at all. Only the tools we use to scan them have

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  • [–] 12 points 1 year ago (3 children)

    Did you know that you can halftone dither two different but same size QR codes on top of each other?

    I wish I had a link to the article handy, but yeah I've tried that myself and it totally works! You basically get a 50/50 chance of one or the other code scanning. It's literally two QR codes in one!

    And no, that's not some new special QR code format either, it's basically taking advantage of the nature of the scanners plus the built in error correction.

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  • [–] 3 points 1 year ago (2 children)

    What’s a use for an ambiguous QR code panel where you can’t predict which of two codes may be scanned? I’m struggling to come up with anything that makes sense where the mechanism potentially slightly favours one or the other depending on the scanner/ tones used.

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  • [–] 3 points 1 year ago

    The two QR codes could be totally related, like two different versions of a rickroll, or two different versions of bad apple.

    You just never know exactly which one you're gonna get...

    Hint, in my experience testing that, it partly depends what angle you're holding your device when scanning such combo QR codes.

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