About QR-code

QR code. Popularly used in Japan, it is a martix code or 2-dimensional barcode. QR (Quick Response) is specially created for fast encoding and decoding and boasts of larger storage than the normal barcode.

“QR Code is open in the sense that the specification of QR Code is disclosed and that the patent right owned by Denso Wave is not exercised.”—from the Denso-Wave website.

In Japan, firms store advertising information such as shop addresses in QR codes and print them on their advertisements. Consumers who wish to copy down the information no longer need to type or write; they use camera phones to take a picture and decode the QR using downloaded software.

Here the features of QR-Code :

• Storage

• QR Code Data capacity

• Numeric only Max. 7,089 characters
  Alphanumeric Max. 4,296 characters
  Binary (8 bits) Max. 2,953 bytes
  Kanji/Kana Max. 1,817 characters
  Error Correction capacity
  Level L 7% of codewords can be restored.
  Level M 15% of codewords can be restored.
  Level Q 25% of codewords can be restored.
  Level H 30% of codewords can be restored.