Idemia Identity & Security France

Morpho

Cédric Thuillier

Hervé Chabanne

Laurent Kazdaghli

Fantin Girard

Jonathan Milgram

Anthony Cazasnoves

Lauriane Couturier

Matthieu Darbois

Sébastien Bronsart

Jérôme Bayon De Noyer

Cédric Beliard

Methods for augmenting a training image base representing a print on a background, for training parameters of a convolutional neural network, CNN, or for classification of an input image The present invention relates to a method for augmenting a training image base representing a print on a background, characterized in that it comprises the implementation, by data processing means () of a server (), of steps of:

Method for augmenting a training image base representing a print on a background by means of a generative adversarial network

A parameter training method for a convolutional neural network (CNN) for classifying image type data representative of a biometric trait. The method includes the implementation, by a data processor of a server, the steps of (a) for at least one data item from an already classified training database, generation of several alternate versions of this data each by application of at least one transformation chosen from a set of reference transformations satisfying a statistical distribution of transformations observed in the training database and (b) training the parameters of the CNN, from the already classified training database augmented with said alternate versions of the data.

Parameter training method for a convolutional neural network

The present invention concerns a method of classification of an input image representative of a biometric trait by means of a first convolutional neural network, CNN, characterized in that it comprises the implementation by data processing means () of a client () of steps of:

Method of classification of an input image representative of a biometric trait by means of a convolutional neural network

The present invention relates to a method for extracting features of interest from a fingerprint represented by an input image, the method being characterized in that it comprises the implementation, by data processing means () of a client (), of steps of:

Method of extracting features from a fingerprint represented by an input image

A method for signing up a person for biometric verification purposes is provided, the method including: acquiring an image of a biological attribute of the person, the biological attribute including a set of characteristic elements, defining, within the acquired image, at least one area that includes at least part of the biological attribute, and storing, in a biometric database, at least one piece of information indicating that the number of characteristic elements included in said defined area is less than a respective predetermined integer. A related biometric verification method is also provided.

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Courbevoie, France

Cédric Thuillier