Spoof detection by generating 3D point clouds from captured image frames
US12283130B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2019 |
| Grant date | Apr 22, 2025 |
| Priority date | — |
| Expiry date | Jun 30, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/19
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method includes receiving a first sequence of images of a first subject captured over a time period in which relative locations of the image acquisition device with respect to the first subject varies. A first image and a second image are selected as representing a first and second relative locations, respectively, of the image acquisition device with respect to the first subject. A first set of points and a second set of points are generated in a three-dimensional space, using the first image and the second image as a stereo pair, the first and second sets of points representing the first subject, and a background, respectively. It is determined that a difference between a first depth associated with the first set of points, and a second depth associated with the second set of points satisfies a threshold condition, and in response, access to a secure system is prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.