Visual liveness detection
US9626575B2 · kind B2 · utility
1Cited by
4References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2015 |
| Grant date | Apr 18, 2017 |
| Priority date | — |
| Expiry date | Oct 12, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L25/57
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In an approach for visual liveness detection, a video-audio signal related to a speaker speaking a text is obtained. The video-audio signal is split into a video signal which records images of the speaker and an audio signal which records a speech spoken by the speaker. Then a first sequence indicating visual mouth openness is obtained from the video signal, and a second sequence indicating acoustic mouth openness is obtained based on the text and the audio signal. Synchrony between the first and second sequences is measured, and the liveness of the speaker is determined based on the synchrony.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.