Use of correlation histograms for improved glyph decoding
US6714677B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1999 |
| Grant date | Mar 30, 2004 |
| Priority date | — |
| Expiry date | Dec 17, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/14
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method of decoding a plurality of glyphs comprising the steps of scanning a group of glyphs to form image data for expected glyph locations, assigning for each location a first value indicative of the likelihood that location contains a glyph in a first state, assigning for each location a second value indicative of the likelihood that location contains a glyph in a second state, determining the difference between the first and second values for each potential glyph location, establishing a distribution analysis of the determined differences and using that distribution analysis at least in part to control decoding of the plurality of glyphs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.