Optical character recognition system
US4034343A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 1, 1976 |
| Grant date | Jul 5, 1977 |
| Priority date | — |
| Expiry date | Oct 1, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V30/10
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An optical character recognition system for identifying typewritten characters and converting such to standard code for transmission. To achieve recognition of a character, the character, as it is scanned, is recorded in a corresponding array in memory and the memory address for each scan coordinate is then modified to correspond with the virtual character center. This coordinate center of the character is derived by inspection of the scanning array in parallel with the memory storing pass to determine the two adjacent all white rows and columns bounding the character. The coordinate center is then calculated by dividing the bounded row and column increment by two. The recognition of the character pattern is then performed by a set of Boolean discriminants selected to achieve the highest probability of in - character hits against a lowest probability of misses. Print fidelity, quantum misregistration and other character edge noise are filtered by selective OR-ing of test points along an axis having the highest incidence of noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.