Adaptive character extraction method and system
US4742557A · kind A · utility
22Cited by
6References
9Claims
0Family size
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Key dates
| Filing date | Nov 8, 1985 |
| Grant date | May 3, 1988 |
| Priority date | — |
| Expiry date | Nov 8, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V30/10
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and a system for extracting character information from a signal matrix of gray level picture elements which compares pixel elements positioned in annular rings around a central pixel of interest to determine neighbor pair occurrences for purposes of eliminating spurious signals and for establishing a threshold for each document read which is used to eliminate undesired signals from the signal matrix.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.