Optical character recognition by detecting geo features
US5164996A · kind A · utility
Inventor
Key dates
| Filing date | Apr 7, 1986 |
| Grant date | Nov 17, 1992 |
| Priority date | — |
| Expiry date | Apr 7, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V30/10
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An alphanumeric character is recognized by optically scanning that character, detecting the occurrence of predetermined geographical features in the scanned image, comparing the detected geographical features to a store of particular geographical features which identify respective alphanumeric characters, and identifying the scanned image as the alphanumeric character having those geographical features to which the detected geographical features favorably compare. The aforementioned geographical features comprise lagoons (formed as enclosed areas) and bays (formed as open areas). The types of bays and lagoons, as well as the relative positioning of such bays and lagoons with respect to each other, characterize the respective alphanumeric characters. By detecting the bays and lagoons and relative positions thereof in the scanned image, the identity of that image is ascertained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.