Method of verifying unreadable indicia for an information-based indicia program
US5974147A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 1996 |
| Grant date | Oct 26, 1999 |
| Priority date | — |
| Expiry date | Nov 7, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07B2017/00967
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The present invention provides a method for verifying an unreadable information-based indium that has been generated by a postal security device (PSD) for information-based indium comprising a 2-D bar code, certain human-readable information, a digital signature and a certificate. The method comprises the steps of attempting to read the 2-D bar code using sophisticated digital image processing when the 2-D bar code is not readable; and continuing normal processing when the 2-D bar code is readable with the sophisticated digital image processing. When the 2-D bar code is not readable two independent processes are used to determine the indicium certificate. A first process includes reading human readable information by optical character recognition using context, syntax, and redundancy in the human readable information to obtain a PSD-ID; and using the PSD-ID to look up in a certificate database a certificate corresponding to the information-based indicium. A second process includes interpreting partial bar code data and extracting a "best guess" of the certificate and searching the certificate database for the closest matching certificate. The method further comprises merging data o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.