Imaging system
US6757419B1 · kind B1 · utility
5Cited by
16References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2000 |
| Grant date | Jun 29, 2004 |
| Priority date | — |
| Expiry date | May 7, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07D7/12
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method of imaging media, such as banknotes, is provided. A note is moved with respect to a CCD camera and a variable interference filter (VIF), and a succession of images acquired over time. From the plurality of images covering a range of wavelengths of light, profiles may be assembled of the optical characteristics of the banknote. These may then be compared with reference profiles to detect forged, fake, or unacceptable media. The method may also be applied to a range of types of objects. Also provided is an apparatus for implementing the method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.