Character recognition system and its use in an optical document reader
US4584703A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 16, 1982 |
| Grant date | Apr 22, 1986 |
| Priority date | — |
| Expiry date | Dec 16, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V30/10
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A character recognition system comprises a video detector (25) operating with a plurality of threshold signals (V3-V6) in time multiplex mode. Detected video signals are stored in a plurality of storage modules (S3-H S6), one for each time multiplex channel. A signal processor (81) recognizes character data from video data representing a first threshold level (V3) and stored in a first storage module (S3) and subsequently recognizes character data from video data representing a second threshold level (V5) and stored in a second storage module (S3). The system is used in an optical document reader for reading a plural field print line on a document, where the optical characteristics of the various fields are unequal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.