Means for using microstructure of materials surface as a unique identifier
US11721153B2 · kind B2 · utility
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26References
20Claims
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Key dates
| Filing date | Feb 23, 2021 |
| Grant date | Aug 8, 2023 |
| Priority date | — |
| Expiry date | Apr 3, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30176
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present application concerns the visual identification of materials or documents for tracking or authentication purposes. It describes methods to automatically authenticate an object by comparing some object images with reference images, the object images being characterized by the fact that visual elements used for comparison are non-disturbing for the naked eye. In some described approaches it provides the operator with visible features to locate the area to be imaged. It also proposes ways for real-time implementation enabling user friendly detection using mobile devices like smart phones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.