3 ms·
QR codes contain error correction bits. Depending on the error correction level up to 30% of the information can be restored. This allows you to add overlays th
by BjoernKW 9y ago
QR codes contain error correction bits. Depending on the error correction level up to 30% of the information can be restored. This allows you to add overlays that conceal some of the information while the code will still scan correctly.