Barcody Express: QR Code

Barcody Express > Barcodes Indice

QR Code

[Questo sezione non è stato ancora tradotto.]

Valid Characters: Unicode 0x0020–0x01FF
Length of Code: 23,624 Bit (2,953 Byte) = max. 4,296 characters
Checksum: Calculated automatically.

The QR Code is a so-called 2D barcode, which has been developed by the Japanese company Denso Wave in 1994. QR means Quick Response.

The QR Code is built on a square matrix with black and white pixels which represent the binary coded data. Using special marks in three corners, the alignment of the QR Code can be recognized. The data content of a QR Code is protected by a special code which helps restoring up to 30% of damaged data, depending on the error correction level.

Suggerimento: The current implementation of QR Code in Barcody Express supports error correction level L, which means that up to 7% of damaged data can be restored.