System for reading data glyphs
US6078698A · kind A · utility
17Cited by
120References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1999 |
| Grant date | Jun 20, 2000 |
| Priority date | — |
| Expiry date | Sep 20, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/14
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A high speed system for locating and decoding glyphs on documents is disclosed. The system includes acquiring one or more images of a document containing a glyph. One-dimensional projections of the images are correlated against a reference function to locate the glyph in the images. The position of the glyph is refined by correlating against a kernel designed to have a maximum response when aligned over a corner of the glyph. Symbols in the glyph are decoded utilizing a kernel which generates a positive response for one symbol type and a negative response for the other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.