You've seen QR codes with logos in the center. Maybe a Starbucks QR with their siren, or a brand's QR with their logo stamped dead center. How does that work? Doesn't putting a graphic in the middle of the code just... break it? Short answer: yes, but QR codes are designed to survive it. Here's the mechanism. Reed-Solomon error correction QR codes use Reed-Solomon error correction, originally developed for CD scratch recovery. The spec defines four levels: L (7% damage), M (15%), Q (25%), and H