How to Scan a QR Code
Let’s get QR-geeks for a moment
How does a QR code work?
Anyone can think that a QR code consists of random black and white pixels, but behind its design there is a structure that allows the QR to be scanned.
Damaged QR Codes
QR codes are built with error correction, this means that even if the QR code is damaged, or partially covered, it can still be scanned and read. QR codes can be damaged up to 30% and work perfectly thanks to the pattern containing duplicate information (redundancy) of contents.