Abstract: A method for detecting a document fraud is disclosed. A first image of a first document and a second image of a second document are obtained. A procedure of detection of zones sensitive to document frauds are applied in the regions of the first image and of the second image registered on the first image. Each sensitive zone detected is then divided into a plurality of subparts. A measurement of dissimilarity is calculated between corresponding subparts from the first image and the registered second image. It is then determined whether the first document is identical to the second document from measurements of dissimilarity. If the first document is different from the second document, a level of difference is determined between the first and second documents according to a value representing a proportion of different subparts; and a fraud is detected when the level of difference is below a third predetermined threshold.

Abstract: A method of detecting attempted fraud against a system recognising the iris of the human eye includes generation of a first image of an iris using first means of image capture in a visible light spectrum, and generation of a second image of said iris using second means of image capture in a near infra-red spectrum. The method also includes determination of at least one characteristic of the first image as a function of respective optical characteristics of pixels of a plurality of pixels of this first image and determination of at least one characteristic of the second image determined as a function of respective luminous intensities of pixels of a plurality of pixels of this second image. As a function of these determined characteristics, a signal representative of suspected detection of attempted fraud is generated.

Abstract: A pyroelectric sensor includes several pixels distributed above a substrate and each pixel includes a first portion made of a pyroelectric material, in direct physical contact with a charge collection electrode, a second portion made of a pyroelectric material, in direct physical contact with a charge collection electrode, the first portion, the second portion and the at least one charge collection electrode being superposed above the substrate, at least one heating element to heat the first and second portions including a pyroelectric material, and an electronic device to measure a difference between charges generated by the first portion including a pyroelectric material and charges generated by the second portion including a pyroelectric material. The pyroelectric sensor makes it possible to suppress a useless part of a measurement signal. It is particularly advantageous for taking an image of a papillary print.

Abstract: The invention relates to a skin print sensor (120) comprising a plurality of elementary acquisition cells (121) which are arranged in and/or on a substrate and each of which includes: a pyroelectric conversion element (PYR) comprising first and second electrodes that are separated by a layer of pyroelectric material, the first electrode being connected to a node (GND) applying a reference potential of the sensor, and the second electrode being connected to a reading node (SN) of the cell; and a third electrode (EL) which is connected to the reading node (SN), is coated with a dielectric layer and is designed to form a capacitance along with the skin of a user.

Abstract: A method produces a matrix of pixels of a thermal sensor, suitable for passive addressing. The matrix of pixels includes a layer including a first series of electrically conducting strips, forming charge collection macro-electrodes; a layer including a pyroelectric material; and a layer including a second series of electrically conducting strips, forming heating strips. The method includes a step of transfer of one on the other of a first and a second elementary stack, the first elementary stack including the first series of strips, and the second elementary stack including the second series of strips. This method makes it possible to relax the manufacturing constraints of the series of strips.

Abstract: The present invention relates to a method of displaying images implemented by a data processing module able to be connected to a display system comprising at least two display zones (ZA1, ZA2), said method of displaying images comprising the following steps: —displaying of a first image (11) in a first display zone (ZA1) of said display system, —displaying of at least one second image (12) obtained by applying to the first image (11) at least one image processing algorithm, each second image (12) being displayed in a second zone (ZA2) of said display system, —as long as one of said second zones (ZA2) displaying one of said second images (12) is hovered over by a pointer, displaying, in all or part of the first display zone (ZA1), of at least one part of said first image to which is applied the at least one processing algorithm making it possible to obtain said second hovered-over image (12).

Abstract: A method for processing an image representing at least one finger supplied by an image sensor of the thin-film transistor type of a fingerprint-capture system is disclosed. The purpose of the method is to modify characteristics of the image so that they correspond to the characteristics of images acquired by a fingerprint-capture system using a CCD or CMOS sensor while preserving relevant information about the image.

Abstract: A method for obtaining an image of at least one fingerprint from a sequence of images is disclosed. The method comprises a segmentation of images in a sequence of acquired images making it possible to determine regions liable to comprise a fingerprint, a tracking of regions determined along with the sequence of images and a calculation of a confidence mark for each region determined. The confidence mark of a region determined is incremented (or respectively decremented) at each acquired image if the region is present in (or respectively absent from) the image, the increment (or respectively the decrement) being dependent on the predefined image acquisition frequency. Information making it possible to obtain a final image containing fingerprints is generated by the method when a predefined number of regions each having reached a confidence mark at least equal to a predetermined threshold is obtained.

Abstract: A method for participating in a lottery is proposed. The following steps are applied by a mobile terminal having an input interface and a secured element. The steps include sending to a lottery server system a subscriber number specific to an identification card of a subscriber of the mobile terminal, receiving a command for configuring the secured element having as addressee the subscriber number, allocating, in the secured element, a memory space from the received configuration command, acquiring via the interface bet data, sending the acquired bet data to the lottery server system, receiving a virtual lottery ticket with a unique identifier generated by the lottery server system in response to the sending of the bet data, and storing the virtual lottery ticket in the secured element.

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 for putting a first device in secure communication with a second device. The first device generating at least one first datum dependent on a private key specific to the first device and a public key specific to the second device. The second device generating at least one second datum dependent on a private key specific to the second device associated with the second device public key, and dependent on a third datum dependent on a public datum specific to the first device. Implementing a test verifying whether the first and second data meet a predetermined condition, and putting the first device in secure communication with the second device only if the predetermined condition is met. Before generating the second datum generating the third datum so that the predetermined condition is met only if input data are identical to reference secret data associated with the second device.

Abstract: The invention relates to a secured comparative processing method of the type in which a processor of an electronic component compares a set of proof data received by the processor as an input with main secret data stored in said electronic component, characterised in that the processor executes, in parallel with the comparison with the secret data, a series of complementary operations on the set of proof data which generate on the electronic component a variation in behaviour which is a function of the proof data which the component receives as an input and which is added to the variation in behaviour linked to the comparison with the main secret data, the series of complementary operations including a series of base operations repeated K times, and the execution of said series being preceded by an adjustment of execution parameters of said series, the parameters including: the identifier of the series of base operations to be executed, the series of base operations being comprised within a set of predefined

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: The invention relates to an electronic card comprising a card body (1) comprising an upper surface (11) and a lower surface (12); a fingerprint sensor (2) flush with the upper surface of said card body; a tactile mark (3) placed on the upper surface of the card body near the fingerprint sensor, said tactile mark having an excess thickness from the upper surface of the card to guide, when said mark is touched, a correct positioning of a finger on said fingerprint sensor, the thickness of the tactile mark being such that the card has a thickness compatible with standard ISO 781 ID1, the thickness of the tactile mark preferably being between 30 and 60 ?m, typically 50 ?m.

Abstract: A method for processing a stream of video images to search for information therein, in particular detect predefined objects and/or a motion, comprising the steps of: a) supplying at least one attention map in at least one space of the positions and of the scales of at least one image of the video stream, b) selecting, in this space, points to be analyzed by making the selection depend at least on the values of the coefficients of the attention map at these points, at least some of the points to be analyzed being selected by random draw with a probability of selection in the draw at a point depending on the value of the attention map at that point, a bias being introduced into the map to give a non-zero probability of selection at any point, c) analyzing the selected points to search therein for said information, d) updating the attention map at least for the processing of the subsequent image, from at least the result of the analysis performed in c), e) reiterating the steps a) to d) for each new image of

Abstract: The invention proposes a verification process of an access right of an individual comprising conducting the following steps before the individual presents themselves at a control point, of: acquisition, by a client device, of a biometric datum on the individual, and transmission of said datum to a remote calculation server, performing a zero-knowledge calculation protocol verifiable publicly by the remote calculation server, comprising: calculation of a function comprising a remote calculation between the biometric datum and each of a plurality of reference data, comparison of each distance to a predetermined threshold, and generation of a result indicating whether at least one of the distances calculated is under said threshold, generation, from said function, of proof of exactness of calculation of the function, transmission via the remote calculation server of the result of calculation of the function and proof of exactness of the calculation to the client device, ?and the process comprises conductin

Abstract: A biometric identification method includes the steps of comparing a candidate print with a reference print and of validating the identification according to a certain number of characteristics common to both prints and a predetermined validation threshold. The method includes the steps of creating at least one deceiving print and comparing same with a candidate print. An identification device designed for implementing this method is also provided.

Abstract: A thermal pattern sensor is provided, including a matrix of several lines and columns of pixels, each pixel including at least one pyroelectric capacitance formed by at least one portion of pyroelectric material arranged between a lower electrode and an upper electrode; wherein one of the lower and upper electrodes forms a reading electrode of the pixels; and a plurality of electrically conductive portions, each being configured for Joule effect heating, independently of other portions of the plurality, of the at least one portion of pyroelectric material of the at least one pyroelectric capacitance of pixels of at least two adjacent lines of pixels associated with the each electrically conductive portion, and each being arranged facing at least a part of a surface of the reading electrode of each of the pixels of the at least two adjacent lines of pixels associated with the each electrically conductive portion.

Abstract: The invention relates to a method for analyzing a structured document likely to be deformed from a first image and a second image of the document, comprising steps of: matching first points of interest extracted in the first image with second points of interest of a reference image showing a model of the document, estimation of a first geometric transformation taking account of deformations of the structured document shown in the first image relative to the model from the matches, determination of at least one first region to be analyzed in the first image, by projection of at least one reference region of the reference image by means of the first transformation, analysis of the content of the first determined region, matching third points of interest extracted in the second image with fourth points of interest extracted in the first image, estimation, from the matches made in the preceding step, of a second geometric transformation taking account of deformations of the document shown in the second image r

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.