How QR codes work
Chapter 1
The board game inspiration
View / Create
Answer
Chapter 2
Anatomy of the square
View / Create
Answer
Chapter 3
The magic of error correction
View / Create
Answer
Chapter 4
From factory floor to global daily life
View / Create
Answer
YOUR GOAL
Master of How QR codes work
Ch 3 · The magic of error correction
marc QR Code Error Correction
Scans on and on, scans on and on! / Even when it's torn, it scans on and on!
Fun Fact
Space probe math: QR codes use Reed-Solomon error correction, the same math NASA used to transmit photos from Voyager 1.
Glossary
reed-solomon code (noun)
A mathematical algorithm used to detect and correct errors in transmitted or stored digital data. This technology allows a QR code to be scanned even with thirty percent of its surface damaged.
A mathematical algorithm used to detect and correct errors in transmitted or stored digital data. This technology allows a QR code to be scanned even with thirty percent of its surface damaged.
Quiz
Up to what percentage of a QR code can be damaged or dirty while remaining fully readable?