Technology
A QR code can survive surprising damage
HERE’S THE INTERESTING PART
Those blocky squares you scan to read a restaurant menu are surprisingly resilient. They use the Reed-Solomon error correction algorithm, meaning you can cover up or destroy up to thirty percent of the code and it will still scan perfectly. The system literally expects you to smudge or tear the paper and stubbornly refuses to stop working.
One discovery leads to another.
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