Method and apparatus for detecting liveness based on phase difference
US12112575B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Jan 7, 2022 |
| Grant date | Oct 8, 2024 |
| Priority date | — |
| Expiry date | Dec 16, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20132
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for detecting a liveness based on a phase difference are provided. The method includes generating a first phase image based on first visual information of a first phase, generating a second phase image based on second visual information of a second phase, generating a minimum map based on a disparity between the first phase image and the second phase image, and detecting a liveness based on the minimum map.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.