Coin validation
US6799670B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 22, 2002 |
| Grant date | Oct 5, 2004 |
| Priority date | — |
| Expiry date | May 7, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07D5/00
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Coin validation can be advantageously improved by transforming measured data values associated with coin characteristics from a first geometric space to a second geometric space, in which the transformed values in the second geometric space are preferably better adapted for discrimination between different coin denominations than the corresponding values in the first geometric space. Preferably, principal component analysis is used to identify principal components that can be used as dimensions of the second geometric space, so that measured data values in the second geometric space are less correlated than in the first geometric space.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.