• Error Correction Level: Error Correction in QR Codes is based on Reed-Solomon Codes , a specific form of BCH error correction codes [3, 8].
    There are four levels (Table 1) of error correction that can be chosen by the user at creation time.
    L 7%
    M 15%
    Q 25%
    H 30%
    Table 1: Error Correction Levels
    Higher error correction levels increase the percentage of code words used for error correction and therefore decrease the amount of data that can be stored inside the code.
  • tea :
    #ECC# Capacity and # Error correction code#
    The capacity of a QR Code depends on several factors. Besides the version of the code that defines its size (number of modules), the chosen error correction level and the type of encoded data influence capacity.

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