Error Correction Level
QR codes use Reed–Solomon error correction over the finite field.
https://en.wikipedia.org/wiki/QR_code#Error_correction
Level H (High), approx 30%
Level L (Low), approx 7%
Level M (Medium), approx 15%
Level Q (Quartile), approx 25%
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Error Correction Level
QR codes use Reed–Solomon error correction over the finite field.
https://en.wikipedia.org/wiki/QR_code#Error_correction