Lists error correction levels for the QRCode.
Allows recovery of up to 15% data loss.
Allows recovery of up to 7% data loss.
Allows recovery of up to 30% data loss.
Allows recovery of up to 25% data loss.
The data can be recovered if the QR Code image is partially damaged. To accomplish this, the QR Code uses Reed-Solomon error correction.
A higher correction level means a more robust bar code.