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Presentation on QR code.

QR code is a kind of matrix 2D barcode designed by Denso-Wave Corporation of Japan in 1994 for the automotive industry.

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Presentation on QR code.

  1. 1. S. M. Rakibul Islam Ratul ID: 181-15-10869 Presentation Presenter On QR Code
  2. 2. Introduction QR code is a kind of matrix 2D barcode designed by Denso-Wave Corporation of Japan in 1994 for automotive industry. Its benefits are high-speed recognition, strong error-correction capability. It is more advanced bar coding system, barcode is machine readable optical label that contain the information about the item which it is attached. QR codes works in the barcodes technology and it consist of black square dots on white background. What is QR code?
  3. 3. Barcode Technology QR codes work on the barcode technology. Barcodes originally were scanned by special optical scanner called Barcode reader. There are two types of Barcode Technology 1D Barcode  Use only length  Height is for scanning convenience  Read by leaser  30 ASCII characters 2D Barcode  Stores data in length/height matrix  Read by an image scanner [CCD or camera]  7089 characters
  4. 4. 2D Barcode How it works? QR Code generator Print or Link User connect with smartphone or computer It requires a QR scanner application which is to be installed in smart phone or computer to decode the information in QR code. Where white represent 0 and black represent 1 Made of
  5. 5. 1 3 4 2 How QR codes are built To detect the position and rotation of the code Timing structure Format of the data Mask of the data
  6. 6. 5 7 8 6 How QR codes are built Error correction for five bits Single bit Type of encoding the data is stored Message length
  7. 7. 9 10 How QR codes are built Message Error correction QR Code
  8. 8. QR code QR Code S. M. Rakibul Islam Ratul ID: 181-15-10869
  9. 9. Used Algorithms Encryption  Encrypted QR codes, which are not very common, have a few implementations.  The QR App, manages encryption and decryption of QR codes using the DES algorithm. Error correction  It has a function of an error correction for miss reading that white is black.  It use the Reed-Solomon error correction algorithm with four error correction levels.  Capacity of a QR code is determined by version, error correcting level and encoding mode.
  10. 10. T H A N K S F O R W A T C H I N G