Method of processing an analog electrical signal containing information representative of reflected light from coded indicia, wherein the electrical signal contains edge transitions
US6328213A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 1998 |
| Grant date | Dec 11, 2001 |
| Priority date | — |
| Expiry date | Jun 12, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/14
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Processing an analog electrical signal containing information representative of reflected light from indicia including regions of different light reflectivity, wherein the analog electrical signal contains edge transitions corresponding to boundaries between adjoining regions of different light reflectivity of the indicia. The edge transitions of at least a part of the analog electrical signal are analyzed to determine a level of blur in that part of the electrical signal. Based on the determined level of blur, one of a plurality of different techniques is selected for processing that part of the electrical signal to produce a digitized electrical signal in which transitions in the digital level of the signal correspond to boundaries between adjoining regions of different light reflectivity of the indicia.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.