Method of and apparatus for optical character recognition based on geometric and color attribute hypothesis testing
US5875261A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1991 |
| Grant date | Feb 23, 1999 |
| Priority date | — |
| Expiry date | Dec 20, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V30/224
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Method of, and apparatus for, optical character recognition of predominate and non-predominate color coded characters based on hypothesis testing utilizing both geometric optical character recognition and color coded optical character recognition techniques. In this hypothesis testing technique, geometric OCR is used to generate a null hypothesis that a target character has been recognized, and an alternative hypothesis that the target character has not been recognized. Color coded OCR is used to select either the null hypothesis or the alternative hypothesis. Alternatively, the roles of geometric OCR and color coded OCR may be reversed such that color coded OCR is used for hypothesis generation, and geometric OCR is used for hypothesis selection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.