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.

Abstract: A method for biometrically recognizing individuals, comprising the following steps: performing at least two biometric recognitions based on separate sets of biometric characteristics detected on an individual during at least one first and one second detection operations; detecting a third set of biometric characteristics during the first detection and a fourth set of biometric characteristics during the second detection; verifying that the third set of biometric characteristics matches the fourth set of biometric characteristics. A corresponding enrolment method and a device to implement these methods.

Abstract: A method and device for verifying the validity of an electronic document is provided. A device for capturing images and capturing a sequence of images displayed by a device for presenting the electronic document is activated. The sequence of images may include different two-dimensional barcodes displayed successively one after the other, where the two-dimensional barcodes represent a signature of the electronic document and parts of the electronic document. The two-dimensional barcodes are decoded, and the validity of the signature is verified by means of a public key. A message representing the result of the verification is generated.

Abstract: A fraud detection method for access control via facial recognition, wherein the following are carried out in the region of a zone where the access control is verified for an individual presenting in the region of the zone: a measure of the weight of the individual, at least one weight sensor being provided on the ground for this purpose; an estimation of the weight of the individual by processing by a computer unit of an image acquired of the face of an individual presenting at the access control; a comparison by the computer unit between the estimated weight and the measured weight and wherein the computer unit triggers or not the sending of a fraud detection signal as a function of the result of this comparison.

Abstract: The invention relates to a device for acquisition of images for a biometric system, which includes an optical assembly and at least one imager for acquisition of an image of an object to be analysed presented in front of the assembly at a non-determined distance from the latter. The assembly includes at least one diaphragm with a coded aperture. The optical assembly allows acquisition by the sensor(s) of an image of the object capable of being exploited to deduce therefrom the searched biometric information, and of an image of the object acquired via the coded aperture of the diaphragm. The device also includes a processing unit to determine the distance of the object to be analysed as a function of the image of the object acquired via the coded aperture of the diaphragm.

Abstract: A device and method, the purpose of which is to secure digital fingerprint reading by sequential optical captures with optimization of the exposures to light. At least one of the illumination and detection parameters is adjusted as a function of the acquisition conditions (physiological condition of the epidermis, exposure to ambient light) owing to the means of control.

Abstract: A method for biometrically recognizing individuals, comprising the following steps: performing at least two biometric recognitions based on separate sets of biometric characteristics detected on an individual during at least one first and one second detection operations; detecting a third set of biometric characteristics during the first detection and a fourth set of biometric characteristics during the second detection; verifying that the third set of biometric characteristics matches the fourth set of biometric characteristics. A corresponding enrolment method and a device to implement these methods.

Abstract: A fraud detection method for access control via facial recognition, wherein the following are carried out in the region of a zone where the access control is verified for an individual presenting in the region of the zone: a measure of the weight of the individual, at least one weight sensor being provided on the ground for this purpose; an estimation of the weight of the individual by processing by a computer unit of an image acquired of the face of an individual presenting at the access control; a comparison by the computer unit between the estimated weight and the measured weight and wherein the computer unit triggers or not the sending of a fraud detection signal as a function of the result of this comparison.

Abstract: A method and device for verifying the validity of an electronic document is provided. A device for capturing images and capturing a sequence of images displayed by a device for presenting the electronic document is activated. The sequence of images may include different two-dimensional barcodes displayed successively one after the other, where the two-dimensional barcodes represent a signature of the electronic document and parts of the electronic document. The two-dimensional barcodes are decoded, and the validity of the signature is verified by means of a public key. A message representing the result of the verification is generated.

Abstract: The invention relates to a method and a device (1) for authenticating information contained in a document (6), said device including at least one imager configured for acquiring at least one image of an acquisition field, at least one light source, computer processing means configured for processing the image and for extracting therefrom data relating to the document, said device being adapted so as to be mounted on the head of a user (10) so that its acquisition field (11) covers at least one portion of the field of vision (12) of the user (10), the light source being configured so as to emit in the acquisition field (11) of the imager, a light of at least one non-visible wavelength, the imager being adapted for allowing acquisitions at said wavelength and thus allowing acquisition at this wavelength of an image of a document (6) presented to the user (10) in the acquisition field of the imager. The invention also relates to the corresponding method.

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.

Abstract: A device and method, the purpose of which is to secure digital fingerprint reading by sequential optical captures with optimization of the exposures to light. At least one of the illumination and detection parameters is adjusted as a function of the acquisition conditions (physiological condition of the epidermis, exposure to ambient light) owing to the means of control.

Abstract: A device for capturing an image representing a print of a part of the body of a person, the capture device may include: a base layer; a reference electrode covering the base layer; electronic capsules fixed in the form of a matrix on the reference electrode, each electronic capsule consisting of a microcapsule filled with a liquid medium and particles with two different colors and opposite electrical charges; a support plate covering the electronic capsules and serving as a support for said part; a camera intended to take an image of the electronic capsules; and an active electrode intended to come into contact with said part and electrically connected to a voltage source delivering a non-zero electrical voltage.

Abstract: The present invention relates to a method of identifying a user, the method being implemented by means of a database containing personal data of users and containing for each user at least one unmodified biometric characteristic (E1,i), at least one biometric characteristic (E2,i) that has been modified and that is accessible from the unmodified biometric characteristic, and at least one item of identification data (D) that is accessible from a code identifying the modification that has implemented on the second biometric characteristic. The method comprises the steps of comparing first and second biometric characteristics (e1,i) read from the user with the characteristics in the database in order to determine (5) what modification has been implemented and to deduce therefrom the code identifying the modification; and extracting (6) the identification data by means of the code as deduced in this way. The invention also provides a database for implementing the method.

Abstract: The invention relates to a method and a device (1) for authenticating information contained in a document (6), said device including at least one imager configured for acquiring at least one image of an acquisition field, at least one light source, computer processing means configured for processing the image and for extracting therefrom data relating to the document, said device being adapted so as to be mounted on the head of a user (10) so that its acquisition field (11) covers at least one portion of the field of vision (12) of the user (10), the light source being configured so as to emit in the acquisition field (11) of the imager, a light of at least one non-visible wavelength, the imager being adapted for allowing acquisitions at said wavelength and thus allowing acquisition at this wavelength of an image of a document (6) presented to the user (10) in the acquisition field of the imager. The invention also relates to the corresponding method.

Abstract: The invention relates to a device for acquisition of images for a biometric system, which includes an optical assembly and at least one imager for acquisition of an image of an object to be analysed presented in front of the assembly at a non-determined distance from the latter. The assembly includes at least one diaphragm with a coded aperture. The optical assembly allows acquisition by the sensor(s) of an image of the object capable of being exploited to deduce therefrom the searched biometric information, and of an image of the object acquired via the coded aperture of the diaphragm. The device also includes a processing unit to determine the distance of the object to be analysed as a function of the image of the object acquired via the coded aperture of the diaphragm.

Abstract: A device for capturing an image representing a print of a part of the body of a person, the capture device may include: a base layer; a reference electrode covering the base layer; electronic capsules fixed in the form of a matrix on the reference electrode, each electronic capsule consisting of a microcapsule filled with a liquid medium and particles with two different colours and opposite electrical charges; a support plate covering the electronic capsules and serving as a support for said part; a camera intended to take an image of the electronic capsules; and an active electrode intended to come into contact with said part and electrically connected to a voltage source delivering a non-zero electrical voltage.

Abstract: A security gate has two walls defining between them a passage through which an individual passes, for each wall, a transparent lighting window extending over at least part of the wall, for at least one of the edges of the lighting window, a light source intended to light the edge and to generate light beams that propagate through the thickness of the lighting window, and for each lighting window, at least one extraction zone provided on the lighting window and intended to transmit the light beams towards the face of the individual passing through the passage, the light beams thus transmitted forming, with respect to the plane of the lighting window from which they emanate, an angle adapted to the geometry of the security gate so as to optimize the lighting of the individual.

Abstract: The invention relates to a registration method for future biometric verification purposes, including the following steps for one person (I): obtaining first biometric data (4) and second biometric data (5) relating to said person; obtaining alphanumerical data (a) including at least one identifier relating to said person; storing, in a first biometric database (1), the thus-obtained first biometric data in association with a decryption key (6); storing, in a correspondence table (T), first information from the thus-obtained second biometric data and alphanumerical data in correspondence with an index (j); storing, in a second database (2), second information from the thus-obtained second biometric data and alphanumerical data in association with a version (J) of said index that is encrypted with an encryption key corresponding to said decryption key, said second information being different from the first information.

Abstract: A security gate has two walls defining between them a passage through which an individual passes, for each wall, a transparent lighting window extending over at least part of the wall, for at least one of the edges of the lighting window, a light source intended to light the edge and to generate light beams that propagate through the thickness of the lighting window, and for each lighting window, at least one extraction zone provided on the lighting window and intended to transmit the light beams towards the face of the individual passing through the passage, the light beams thus transmitted forming, with respect to the plane of the lighting window from which they emanate, an angle adapted to the geometry of the security gate so as to optimize the lighting of the individual.