Method and apparatus for determining document authenticity
US6621916B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 1999 |
| Grant date | Sep 16, 2003 |
| Priority date | — |
| Expiry date | Sep 2, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07D7/1205
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for verifying the authenticity of a document relative to a previously programmed document are disclosed. The method provides a broadband light source; illuminates a document with the light source; collects reflected light; converts it into a corresponding electrical signal or signals; digitizes the electrical signals; and prepares a spectral signature of the document for further analysis. The spectral signature can also be normalized to account for variations in analyzed documents caused by soiling and fading. The method also provides for comparing a previously programmed and stored spectral signature to the spectral signature of a test document using a matching value to indicate whether the test document is authentic or not. The apparatus provides a device for application of the method for verifying document authenticity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.