Patent · US Expired

Method for automatic character recognition employing a lexicon having updated character strings

US4979227A · kind A · utility

31Cited by

7References

1Claims

0Family size

Assignee

Computer Gesellschaft Konstanz mbH · DE

Inventors

Helmut Mittelbach · Konstanz, DE
Xaver Mueller · Radolfzell, DE
Peter Schlegel · Obernzenn, DE

Key dates

Filing date	Oct 14, 1988
Grant date	Dec 18, 1990
Priority date	—
Expiry date	Oct 14, 2008

Classification

Technology area (CPC G)Physics
CPC primaryG06V30/10
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

In a method for automatic character recognition, character strings marked by word start and word end are formed from the discrete characters calculated with the assistance of a character classifier. These character strings are checked with stored comparison strings of a context lexicon with respect to identity or similarity. The context lexicon is continuously updated by continuous read-in of strings containing no rejection characters, whereby the repeated read-in of identical strings is counted. Current strings are compared to the strings of the context lexicon and that string which is optimum with respect to similarity and frequency is selected for further evaluation. A correction provided with reference to the context comparison is only executed when the substitution transposition is probable based on the classifier characteristic for the characters under consideration.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.