Method and a device for detecting fraud by examination using two different focal lengths during automatic face recognition
AssigneeSafran Identity & Security
InventorsFrançois RIEUL, Jean BEAUDET, Baptiste CHU
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Abstract
A method and an associated device for detecting fraud during automatic face recognition, the method comprising the following steps: acquiring a first image of the face by means of a first sensor having a first field angle, and a second image of the face by means of a second sensor having a second field angle that is narrower than the first field angle; analyzing the first image to verify that there is no frame around the face; and analyzing the second image to verify that there is no moiré effect.
Claims8
An automatic face recognition method, the method comprising, during a fraud detection stage, the following steps:
- acquiring at least one first image of the face by means of a first sensor having a first field angle;
- substantially simultaneously, acquiring at least one second image of the face by means of a second sensor having a second field angle, the sensors having fields of view covering a common zone in three-dimensional space, and the first field angle being wider than the second field angle;
- analyzing the first image to verify that there is no border around the face;
- analyzing the second image to verify that there is no moiré effect;
- and
- detecting the absence of fraud when there is no frame and no moiré effect.
Dependencies are inferred from the claim text.