BETA
Chapter 1
The board game inspiration
Chapter 2
Anatomy of the square
Chapter 3
The magic of error correction
Chapter 4
From factory floor to global daily life
YOUR GOAL
Master of How QR codes work
Ch 3 · The magic of error correction
marcus Assemble the pixel patches to discover how QR codes store and share digital information.
marcus QR Code Error Correction
Scans on and on, scans on and on! / Even when it's torn, it scans on and on!
marcus QR codes can be generated with four different levels of error correction depending on their environment.
marcus Designers exploit error correction to place custom logos or artwork directly inside QR codes.
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
What happens to a QR code's data capacity as you increase its error correction level?
Quiz
Up to what percentage of a QR code can be damaged or dirty while remaining fully readable?