Bar code scan stitching
US5821519A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1997 |
| Grant date | Oct 13, 1998 |
| Priority date | — |
| Expiry date | Mar 24, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/14
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for combining decoded scan fragments of a bar code symbol composed of a delimited plurality of bar code elements representing an ordered sequence of data characters. The method includes scanning the symbol along a first scan path that includes a delimiter to obtain a first sequence of data characters; scanning the symbol along a second scan path that includes another delimited to obtain a second sequence of data characters; comparing the predetermined length of the lengths of the first and second sequences of data characters; and based on the comparison combining the first and second sequences to produce the ordered sequence of data characters. In a further version of the method, the first and second sequences are loaded into a stitching buffer, and a corresponding reliability or redundancy buffer is also maintained where information on the expected reliability of the individual decoded characters can be stored. The bar code symbol is considered properly decoded only if the information stored in the reliability buffer passes a series of tests.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.