Morpho

Idemia Identity & Security

Idemia Identity & Security France

Jean-François Boulanger

Alain Thiebot

Julien Doublet

Benoît Thouy

Damien Moriceau

Benoit Thouy

M Alain Thiebot

The invention relates to a method for detecting fraud to authenticate that an object is a human finger from a three-dimensional representation of said object comprising a set of representation points () modeling at least a part of the surface of the object, comprising the following steps:

Method for detecting fraud to authenticate a finger

Validation of using a finger as support of a fingerprint may include:

Method of validation of the use of a real finger as support of a fingerprint

A method for following an object in a sequence of at least two images, termed previous and current, comprises a step of forming a first set Eof points E={P(1), . . . , P(i), . . . , P(N)} by extracting N characteristic points P(i) of the object present in the previous image and of forming a second set Eof points E={P(1), . . . , P(i), . . . , P(M)} by extracting M characteristic points P(j) of the object present in the current image. The method further comprises a step of estimating the parameters of a model of movement of the object between the two images on the basis of pairs of matched points thus formed, and a step of selecting the pairs of matched points used to estimate the parameters of the movement model. The pairs of matched points may be selected solely from among those which are related to points of the first set of points which are singular.

Method and device for following an object in a sequence of at least two images

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Issy-les-Moulineaux, France

Jean-François Boulanger