Spoof detection based on specular and diffuse reflections
US11893100B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2021 |
| Grant date | Feb 6, 2024 |
| Priority date | — |
| Expiry date | Mar 29, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K59/40
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates biometric authentication using an optical biometric arrangement comprising an image sensor comprising a photodetector pixel array configured to capture an image of an object, the image sensor being arranged under a color controllable light source comprising light source units, the method comprising: providing a light pattern comprising portions of different light intensity for illuminating the object; acquiring an image of the object, the image comprising image portions corresponding to the portions of different light intensity of the light pattern illuminating the object, at least one image portion being captured by pixels in the photodetector pixel array arranged directly under a light source being active during image acquisition, and at least one image portion being captured by pixels in the photodetector pixel array arranged under an at least partly in-active illumination area of the color controllable light source during image acquisition, and performing biometric authentication at least partly based on metrics extracted from the image portions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.