2D Bar Codes

1. 2D Bar Codes CAO Lei (ee_clxab)NING Bo (ee_nbxaa)SURIA Omair Aziz (ee_soa)

3.                        Definition: Matrix (2D) barcodes A matrix code, also known as a 2D barcode or simply a 2D code, is a two-dimensional way of representing information. It is similar to a linear (1-dimensional) barcode, but has more data representation capability. (From Wikipedia)

4.                  Why 2D barcode?       The quest for higher capacity  barcodes printed to the same scale Code 128 Char encoded: ABC1234xyz Char Count:10 PDF417 Char encoded: ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz Char Count: 62

6. Evolution of 2D Code

7. Features of QR Code • High Capacity • Up to 7,089 characters • Small Printout size • 1/10 size 1D Barcode • Damage Resistant • Up to 30% of codewords • Omni-directional • 360 degree high speed reading • Makes use of position detection patterns located at 3 corners.

8. Error Correction Feature in QR Code • Four levels of error correction capability • Raising this level improves error correction capability but also increases the code size. • Factors: Operating Environment and QR code size (e.g. Factory compared to clean environment) • Error Correction feature implemented by adding a Reed-Solomon Code to the Original data

9. Popular Types of 2D Codes

10. 2D Barcode Designs MaxiCode Aztec Code ShotCode QR Code EZ Code HCCB

11. 2D Barcode Applications Dolby Digital Mobile ticketing URL storage

12. The End