Defensive measures for residue re-imaging
US11010589B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 2019 |
| Grant date | May 18, 2021 |
| Priority date | — |
| Expiry date | Mar 18, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/40
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An input device includes a biometric sensor and a processing system. The biometric sensor is configured to capture images of a sensing region of the input device. The processing system is configured to acquire a first image of the sensing region in response to a first authentication trigger, and to acquire a second image of the sensing region in response to a second authentication trigger. The processing system is further configured to determine an amount of similarity between the first image and the second image, and to validate the second image for user authentication when the amount of similarity between the first image and the second image is below a threshold level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.