Guiding a scanning device to decode 2D symbols
US6802450B2 · kind B2 · utility
28Cited by
19References
15Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Aug 5, 2003 |
| Grant date | Oct 12, 2004 |
| Priority date | — |
| Expiry date | Aug 5, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/06037
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
To facilitate the decoding of a 2D symbol (e.g., PDF417), a plurality of positioning lines are attached to the 2D symbol. Depending on implementation, these substantially parallel positioning lines may be provided on at least one side of the symbol or superimposed on the symbol. A scanning device is provided to capture an image of the symbol together with these positioning lines that are then detected to determine an orientation of the 2D symbol. In some cases, these positioning lines are used to correct images with distortion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.