Abstract: A method of detecting a venous network in a portion of a human body, the method comprising the steps of capturing an infrared image of said human body portion in order to reveal a venous network of said human body portion; analyzing contrast in the infrared image in order to determine contrast characteristics of the infrared image; and determining whether the human body portion is real on the basis of contrast characteristics determined in the infrared image and of contrast characteristics determined from reference human body portions. A method of biometric recognition with a prior stage of detecting whether a portion of a human body is real.

Abstract: Provided is a method/system for taking, by an imaging device, one or more images of an object or a part of an object presented at a distance in front of the imaging device, the object being illuminated by a lighting system. The method/system may include: estimating a 3D model of the object as it will be at a predetermined time when taking the image by the imaging device; simulating, using the estimated 3D model, the illumination of the object as it will be at said time to obtain estimated images of the object in respectively a plurality of envisaged lighting modes of the lighting system; selecting a lighting mode of the lighting system from the estimated images; and controlling the lighting system to be in the selected lighting mode; and controlling the imaging device, at the time of the taking of the image of the object, to effect the taking.

Abstract: Disclosed is a checking device that is intended to check the authenticity of a fingerprint of a finger and which includes, among other things, a capture system for capturing an image of the finger and of the fingerprint, and acquisition means for acquiring a three-dimensional model of the finger. The checking device also includes means for determining the core on the image of the fingerprint, for locating the crown of the three-dimensional model, for determining the orientation and position of the end of the finger and for determining the relative positions of the end, the crown and the core. From these elements, the checking device can decide whether the fingerprint is real or false.

Abstract: An image correction method includes: estimating a 3D model of an object as when an imaging device takes an image of the object; calculating the light intensity of each point of a simulated image as it would be taken by the imaging device, using the estimated 3D model of the object, a model of illumination of the object illuminated by a lighting system that illuminates the object, a model of reflection on a surface of the object, and a model of the imaging device, to obtain a simulated image of the object; and correcting the taken image by modifying the light intensity of each point on the taken image or on at least one area of interest of the taken image, according to the light intensity of the corresponding point in the simulated image or the respective light intensities of points adjacent to the corresponding point in the simulated image.

Abstract: Disclosed is a method intended to validate that an element is covered with a true skin and implemented by a validation device including a light source at at least one wavelength, a sensor, an analysis module and a decision-taking module. The method may include: placing a surface of the element in front of the light source and the sensor; illuminating, by the light source, the surface of the element; capturing, by the sensor, for each wavelength, an image of the positioned element that encompasses an illuminated zone of the element directly illuminated by the light beam and a peripheral zone (“the diffusion zone of the element,” which is peripheral to the illuminated zone); analyzing the illuminated zone and the diffusion zone of the captured image; and deciding, by the decision-taking module, whether the element is covered with a true skin according to the results of the analysis.

Abstract: The present invention concerns a method and device for detecting the orientation of an area (DO) of the body of an individual placed on an apposition area (AP) of a biometric sensor mounting (P) designed to form a first image (I1) of the area (DO) of the body by total reflection of radiation on the apposition area (AP), and a second image (I2) of the area (DO) of the body from radiation able to pass through the tissues of the body and to be reflected on haemoglobin. The method is characterized in that it comprises a step of determining in a reference frame firstly the longitudinal axis (A) of the area of the body depicted in the first image and secondly two longitudinal edges (B1, B2) of the area of the body depicted in the second image, and a step of determining the orientation of the area of the body with respect to the mounting from the measurement of the relative positions of the two edges (B1, B2) and the axis (A) thus determined in the reference frame.

Abstract: A method of managing file identifiers in a portable data medium having an integrated circuit by means of a table of identifiers associating a given reference with each of the identifiers of a given file. A portable data medium including an integrated circuit arranged for performing the method.

Abstract: A database stores a number N of biometric data representatives which correspond to a set of characteristics of said biometric data. Acquired biometric data is obtained. Then, transformed biometric data is obtained by transforming the acquired biometric data according to said set of characteristics. Next, N deviation values are obtained by applying a comparison between the transformed biometric data and the N representatives in the database. Finally, a vector representing the acquired biometric data is obtained, the representation vector having a number of components less than or equal to N, said components being determined in relation to said N deviation values.

Abstract: The invention relates to a method and system for managing and checking different identity data relating to a person. According to the invention, a derived-identity management server generates for the person at least part of the identity data with which said person can be authenticated in relation to a service provider for the derived-identity domain, on the basis of information derived from identity data from parent domains. The identity data generation processing ensures that no link can be established from two authentications in two separate domains in the absence of link information. If necessary, said link information is transmitted by a parent domain to a derived-identity server so that the latter establishes the link between the identity data of the derived-identity domain and the identity data of the parent domain, e.g. for the cascade revocation of a person from various domains.

Abstract: The invention relates to a method for masking the end-of-life transition of an electronic microprocessor device comprising a reprogrammable non-volatile memory containing an end-of-life state variable (FdVE). The value of the variable (FdVE) is loaded (A) into random access memory. Prior to the execution of any current command (COM), the value of the variable (FdVR) in random access memory is checked (B). The end-of-life transition is executed (C) in the event of an empty value. Otherwise, the initialization or the execution of the command (COM) is continued (D). Upon detection (E) of an intrusive attack, the end-of-life state variable (FdVR) is written (F) in the single random-access memory, and the end-of-life state variable (FdVE) is deleted (G) from the non-volatile memory in a delayed manner. The invention is suitable for all electronic devices, microprocessor cards or the like.

Abstract: The tracking method comprises, for at least a first image of the text having at least a first line of characters: applying a prediction of a movement to which the text is subjected between the first image and a second image of the video stream, the movement prediction being applied to at least one second line of characters of the second image; determining at least one alignment hypothesis for aligning the first line with the second line after applying the movement prediction; estimating for each alignment hypothesis, a geometrical transformation between the first line and the second line resulting in that alignment; and evaluating a character match metric for each alignment hypothesis, the metric being evaluated from signatures calculated on the characters of at least one line of the first image and signatures calculated on the characters of at least one line of the second image put into correspondence with the characters of said at least one line of the first image after applying the geometrical transform

Abstract: A decision device for deciding whether an eye having a macula and an optical axis is real or false includes: lighting means emitting an infrared flux towards the eye along an entry axis; an infrared capture means for capturing an image of the eye along an exit axis, the entry and exit axes being aligned with the optical axis so that the macula illuminated by the lighting means under the incidence of the entry axis is seen by the capture means; processing means for detecting, on an image captured by the capture means, whether a peripheral zone representing the iris exists and whether a central zone in the peripheral zone, the colour of which is representative of the macula existence, exists, and for delivering information representing this detection; and decision means for deciding whether the eye is real or false according to the information delivered by the processing means.

Abstract: A server-implemented method encrypting at least two pieces of indexed data as lists of elements, each element belonging to a finite set of indexed symbols on an alphabet. The data is encrypted to form a protected set, including: the server randomly generates, for each datum, a corresponding encoding function; if at least one element that constitutes a datum is the symbol of the alphabet, the server determines the image of the symbol of the alphabet via the encoding function corresponding to the datum to obtain a codeword coordinate and adds the codeword coordinate to an indexed set corresponding to the element of the alphabet; then the server completes the indexed set with error-inducing points; the server randomly reindexes the elements of the indexed set corresponding to the symbol of the alphabet; and the server adds the indexed set to the protected set. The method can identify an individual.

Abstract: The invention relates to a secure method of processing data in which method is implemented the evaluation of a function that may be written as a linear combination of sub-functions with two binary inputs, in which a client and a server each possess a binary code, comprising n indexed bits, the method comprising the evaluation of the function with the binary codes of the client and of the server as inputs, without one of the client or the server obtaining information about the code of the other, the method being characterized in that it comprises the following steps: —the server randomly generates n indexed values and calculates the linear combination of these values with the same linear combination as that applied to the sub-functions to obtain the function, —the client implements, for each bit of his binary code, a technique of unconscious transfer to obtain from the server an intermediate data item comprising the randomly generated value of same index as the bit of the code of the client, increased by the v

Abstract: A method for segmenting fingers may include: a capture step during which the acquisition device captures an image of the fingers and of the sight; a computing step during which the processing unit computes the unrolled phase image from the image of the thus captured; a derivation step during which, for each pixel of the phase image thus computed, the processing unit computes the derivative of the phase along the isointensity axis of the sight; a regionalisation step during which the processing unit associates each pixel where the derivative of the phase has been computed with a region grouping all the adjoining pixels step by step where the derivative of the phase has the same polarity; and a recognition step during which the location of each finger is recognised from the analysis of the regions thus determined.

Abstract: Detecting a true face includes: capturing a parallel image of a face captured by a camera having a filter polarizing parallel to a polarization direction and an orthogonal image of the face captured by a camera's filter polarizing orthogonally to the polarization direction; computing a difference image from difference between the parallel and orthogonal images; filtering the difference image in wavelet packets on 5 levels, eliminating “low” resolution levels; dividing the filtered image into sub-images; the filtered image and each sub-image undergoes: a Fourier or discreet cosine transformation; and modelling during which the frequency decrease profile is modelled by a model of the power type (a.

Abstract: A person may be identified by at least an identification system including a device for capturing an image of a venous network of a finger and a database containing reference venous network images partitioned by class according to topological characteristics and for each class reference topological characteristics. In one embodiment, an image of the venous network is captured, transmitted to the processing unit, centered relative to a display window, and cut into at least two bands parallel to the finger's axis. A set of each band's topological characteristics is extracted. A distance between the extracted set and all reference topological characteristics of the class is calculated, for each class. The venous network image is classified in the class corresponding to the smallest distance and is compared with each reference venous network image in the class. The authenticity of the person from the result of the comparison step is decided.

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 invention concerns an antifraud device (100) for validating the use of a real part of a body as an imprint-bearing substrate (150) and comprising: a control unit (106), a sensor (102) intended to capture the image of an imprint carried by the substrate (150) placed on said sensor (102), a movement module (104) on which said sensor (102) is mounted and which is intended to move said sensor (102), an analysis module (108) intended to receive the data representing an image of an imprint captured before the movement of said sensor (102) and an image of an imprint (200) captured after the movement of said sensor (102) and to analyze them, and a decision-making module (110) intended to make a decision as to whether or not the substrate (150) is a real part of a body, from information transmitted by the analysis module (108).

Abstract: A detection gate for detecting substances carried by an individual or an object, has two lateral uprights facing one another and defining a passage there between for the individual or the object, a blowing device installed in a blowing chamber in one of the uprights which are adapted to exhaust the air contained in the blowing chamber towards the other upright, an exhaust device installed in an exhaust chamber in the other upright, which are suitable for exhausting the air thus blown, a detection device arranged upstream from the passage and adapted to detect the presence of the substances in the air thus blown, and a transfer line which, via one of the ends thereof, leads into the blowing chamber and, via the other end thereof, into the exhaust chamber, the blowing device and the exhaust device being such that a single volume of air has time to pass through the passage at least twice during the time that individual or the object is present in the passage.