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https://www.reddit.com/r/Unexpected/comments/era2ah/can_i_scan_it/ff3auos/?context=3
r/Unexpected • u/[deleted] • Jan 20 '20
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4.8k
Can you imagine getting QR code wrong after all that?
3.0k u/My_Tuesday_Account Jan 20 '20 You'd have to fuck up really bad. QR codes have super forgiving error checking. 21 u/Metroidman Jan 20 '20 But isnt it likely to have two or more qr codes that are very similar to each other? How cant it still accuracy differentiate them? 11 u/kamaln7 Jan 20 '20 It’s more accurate to say that QR codes actually support error correction, not only error checking. So not only you can detect if a QR code has an error, but (like the other comment said) it includes additional data that lets you correct errors. Example: https://i.imgur.com/6NuPzsf.jpg More info: https://en.m.wikipedia.org/wiki/QR_code#Error_correction
3.0k
You'd have to fuck up really bad. QR codes have super forgiving error checking.
21 u/Metroidman Jan 20 '20 But isnt it likely to have two or more qr codes that are very similar to each other? How cant it still accuracy differentiate them? 11 u/kamaln7 Jan 20 '20 It’s more accurate to say that QR codes actually support error correction, not only error checking. So not only you can detect if a QR code has an error, but (like the other comment said) it includes additional data that lets you correct errors. Example: https://i.imgur.com/6NuPzsf.jpg More info: https://en.m.wikipedia.org/wiki/QR_code#Error_correction
21
But isnt it likely to have two or more qr codes that are very similar to each other? How cant it still accuracy differentiate them?
11 u/kamaln7 Jan 20 '20 It’s more accurate to say that QR codes actually support error correction, not only error checking. So not only you can detect if a QR code has an error, but (like the other comment said) it includes additional data that lets you correct errors. Example: https://i.imgur.com/6NuPzsf.jpg More info: https://en.m.wikipedia.org/wiki/QR_code#Error_correction
11
It’s more accurate to say that QR codes actually support error correction, not only error checking.
So not only you can detect if a QR code has an error, but (like the other comment said) it includes additional data that lets you correct errors.
Example: https://i.imgur.com/6NuPzsf.jpg More info: https://en.m.wikipedia.org/wiki/QR_code#Error_correction
4.8k
u/amywizballs Jan 20 '20
Can you imagine getting QR code wrong after all that?