Systematic error correction in bar code scanner
US4414468A · kind A · utility
24Cited by
2References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 18, 1981 |
| Grant date | Nov 8, 1983 |
| Priority date | — |
| Expiry date | May 18, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/1486
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A technique for compensating for systematic errors in printing or reading bar codes is disclosed. Label decoding always begins with a center character and proceeds one character at a time toward a margin. When bar-space pair measurements indicate an ambiguous character (which can only be fully decoded using bar width measurements) error correction is based on the characteristics of the adjacent, previously decoded character.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.