Darkfield contamination detection
US10997388B2 · kind B2 · utility
0Cited by
74References
22Claims
0Family size
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Key dates
| Filing date | Feb 7, 2019 |
| Grant date | May 4, 2021 |
| Priority date | — |
| Expiry date | May 16, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30168
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a method for evaluating a darkfield image for contamination, it is determined whether an object is interacting with a fingerprint sensor. Provided an object is not interacting with the fingerprint sensor, a darkfield candidate image is captured at a fingerprint sensor. The darkfield candidate image is evaluated for contamination. Based on the evaluating, it is determined whether the darkfield candidate image includes contamination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.