Method for evaluating a succession of bar code symbols
US5729001A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 11, 1996 |
| Grant date | Mar 17, 1998 |
| Priority date | — |
| Expiry date | Jan 11, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/14
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method to detect, process, and evaluate the quality of a succession of spaced bar code symbols. The symbols are disposed on a continuous substrate, moving past a scanner unit arranged to scan each symbol of the succession, one after the other. The method of the invention continuously scans the substrate to detect the entry of a bar code symbol into the field of view of the scanner unit. The presence of the bar code symbol in the scanner's field of view being established by a first valid decode of the symbol. Next, the first decoded scan and a plurality of subsequent decodable and non-decodable scans of the bar code symbol are processed to determine and store at least one evaluation attribute. The scanning and processing of the bar code continues until a predetermined number of consecutive non-decodable scans are processed, thereby indicating the absence of the bar code symbol from the field of view of the scanner and that the symbol has moved past the scanner. A number of the scans processed and the evaluation attributes determined for each scan, may then be employed to determine a measure of quality indicative of overall quality of the bar code symbol. The process may then be re…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.