Method of eliminating background noise
US8493479B2 · kind B2 · utility
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3References
7Claims
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Key dates
| Filing date | Apr 27, 2011 |
| Grant date | Jul 23, 2013 |
| Priority date | — |
| Expiry date | Oct 31, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07D7/2008
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method of eliminating background noise from a system for authenticating security markers includes capturing an image of a background of the security marker; illuminating the security marker; capturing a plurality of images of the optical response of the security marker; averaging the plurality of optical response images; smoothing the background image; and subtracting the smoothed background image from the average of the plurality of optical response images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.