Method for recognising a false papillary print by structured lighting
US10810406B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 21, 2016 |
| Grant date | Oct 20, 2020 |
| Priority date | — |
| Expiry date | Dec 21, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/45
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for determining if a papillary print is comprised of living human tissue or not, using a papillary print sensor comprising in superposition, a contact surface, an array optical sensor, and a plurality of illuminating devices parallel between them. The method comprises illumination of the papillary print by the illuminating devices forming together, on the contact surface, a light pattern which is uniform along an axis that extends from one side to the other of a detecting surface of the array optical sensor, and acquisition of an image by the array optical sensor, with these steps being implemented at least once; in each image, selection of the pixels corresponding to the valleys or ridges of the print; and using the pixels selected, extraction of an optical characteristic defining the response to illumination, of the material comprising the papillary print.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.