Method and apparatus for decoding two-dimensional bar code
US5635697A · kind A · utility
269Cited by
41References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1994 |
| Grant date | Jun 3, 1997 |
| Priority date | — |
| Expiry date | Jun 3, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2019/06253
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for decoding a two-dimensional bar code symbol using a charge-coupled device (CCD) camera, charge-modulation device (CMD) camera, or other bar code reading device such as a hand-held reader, light pen or wand, scan mouse, or stationary laser scanner. The CCD/CMD camera or reading device optically images the bar code symbol to obtain digital image data, which is stored in a memory. The location and orientation of the two-dimensional bar code
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.