Abstract: A method for determining if a papillary print is comprised of living human tissue or not, using a papillary print sensor comprising in superposition, a contact surface, an array optical sensor, and a plurality of illuminating devices parallel between them. The method comprises illumination of the papillary print by the illuminating devices forming together, on the contact surface, a light pattern which is uniform along an axis that extends from one side to the other of a detecting surface of the array optical sensor, and acquisition of an image by the array optical sensor, with these steps being implemented at least once; in each image, selection of the pixels corresponding to the valleys or ridges of the print; and using the pixels selected, extraction of an optical characteristic defining the response to illumination, of the material comprising the papillary print.

Abstract: The invention relates to a print sensor (160) comprising, on a transparent support substrate, a plurality of elementary acquisition cells (161), each cell comprising a photodetector (PS), a pyroelectric conversion element (PYR), and at least one TFT transistor (RT, SF) connected to both the photodetector (PS) and the pyroelectric conversion element (PYR).

Abstract: A papillary print sensor comprising in superposition a contact surface to which the print to be imaged is intended to be applied, an array optical sensor and illuminating device. The illuminating device is arranged between the contact surface and a detecting surface of the array optical sensor, and consists of a plurality of organic light-emitting diodes, referred to as OLEDs. Each OLED extends uninterruptedly over more than a third of a width (L1) of the detecting surface, and the OLEDs extend together along one or two series of patterns that are parallel to one another and distributed along the length (L2) of the detecting surface. This configuration of the OLEDs allows in particular the transistors for controlling the OLEDs to be placed off the detecting surface (125).

Abstract: Provided is a method of detecting fraud during use of a device for capturing an imprint of a body part using a principle of total internal reflection with dark field and including a transparent plate on which a body part to be verified is placed. The method includes: using the device to acquire a first imprint image with a lighting of the body part such that the whole surface of the body part in contact with the transparent plate returns light; using the device to acquire a least one second imprint image by illuminating the body part with a single LED; obtaining for each second imprint image an item of information representative of a light level re-emitted by the body part by using each image obtained; and comparing each item of information obtained with a reference item of information to validate that the body part is a true body part.

Abstract: A compact device for capturing an imprint of a body part working by total reflection with dark background.

Abstract: A method of recognizing individuals by means of at least one processor executing a recognition algorithm comprising the steps of: detecting biometric characteristics of a finger of a candidate for recognition while writing a signature by pressing the finger against a signature surface; encoding both the written signature and also the biometric characteristics in order to form signature data and biometric data of the candidate; and using the algorithm to compare the signature data and the biometric data of the candidate with signature data and fingerprint biometric data belonging to at least one individual and stored on a data medium.

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: 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 (CND) 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: The invention relates to a skin print sensor (140) comprising, on a supporting substrate, a plurality of elementary acquisition cells (141), each of which includes: a reading node (SN); a first photoelectric or pyroelectric conversion element (PYR) having a first electrode that is connected to the reading node (SN) as well as a second electrode that is connected to a control node (CMD) of the cell; and a third electrode (EL) that 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; in each cell of said sensor, the control node (CMD) is designed to receive a control signal that initiates reading of a value on the reading node (SN), said value representing the capacitance formed between the third electrode (EL) and the user's skin.

Abstract: Thermal pattern sensor comprising a matrix of several lines and columns of pixels, each pixel comprising at least one pyroelectric capacitance formed by at least one portion of pyroelectric material arranged between a lower electrode and an upper electrode, wherein a first of the lower and upper electrodes forms an electrode for reading the pixel, and moreover comprising a plurality of electrically conductive portions each capable of Joule effect heating, independently of the other electrically conductive portions, of the portions of pyroelectric material of the pyroelectric capacitances of the pixels of at least two adjacent lines of pixels associated with the electrically conductive portion, and arranged facing at least a part of the surface of the reading electrodes of each of the pixels of the lines associated with the electrically conductive portion.

Abstract: A method and system for acquiring and analyzing fingerprints with fraud detection in which an image of a fingerprint of an object is formed and the object is irradiated by means of an energizing beam. A fluorescence emitted by the object in response to the energizing beam is analyzed and a validity criterion is established from the analysis of fluorescence and making it possible to discriminate biological tissue from other objects is verified. A region of interest, capable of characterizing the biological tissues is selected on the fingerprint image, where the region of interest defines a useful observation area on the object by correspondence, and the validity criterion is established from measurements of fluorescence intensity relative to the observation area only.

Abstract: A method of capturing a thermal pattern by a sensor comprising a matrix of several rows and columns of pixels and a plurality of heating elements each associated with a pixel or a group of pixels, and capable of heating a heat sensitive measurement element for measurement of the pixel or each pixel in the group of pixels independently of the other heating elements during reading of the pixel or at least one of the pixels in the group of pixels, in which, when a first pixel or a first group of pixels in the matrix is read, the heat sensitive measurement element of this first pixel or first group of pixels is heated by the heating element associated with this first pixel or first group of pixels, and the heat sensitive measurement element of another pixel called second pixel, or of a second group of pixels, in the matrix is heated by at least one other heating element associated with this second pixel or second group of pixels.

Abstract: The invention relates to a print sensor (160) comprising, on a transparent support substrate, a plurality of elementary acquisition cells (161), each cell comprising a photodetector (PS), a pyroelectric conversion element (PYR), and at least one TFT transistor (RT, SF) connected to both the photodetector (PS) and the pyroelectric conversion element (PYR).

Abstract: The invention relates to a method for biometric processing of images of part of the human body comprising at least one finger, said method being performed by a sensor, and wherein an emissive screen (1) displays at least one first display pattern to light said part of the human body and an imager (2) acquires at least one first image of said part of the human body; from this first image, the automated data-processing system determines at least one second display pattern different to the first display pattern; the emissive screen (1) displays at least the second pattern to light said part of the human body and the imager (2) acquires at least one second image of said part of the human body; a biometric processing being performed on a final image constructed from at least the second image.

Abstract: A lighting lens for a biometric measurement device comprises a paraboloidal or ellipsoidal reflector with symmetry of revolution, and a dioptric surface that has two different refractive power values in two perpendicular directions, said two refractive power values being negative or zero. Such a lens can be produced in the form of a block of transparent material and be used in a biometric measurement device. In particular, it makes it possible to capture skin prints as an image with an exposure time that is short.

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: A lighting lens for a biometric measurement device comprises a paraboloidal or ellipsoidal reflector with symmetry of revolution, and a dioptric surface that has two different refractive power values in two perpendicular directions, said two refractive power values being negative or zero. Such a lens can be produced in the form of a block of transparent material and be used in a biometric measurement device. In particular, it makes it possible to capture skin prints as an image with an exposure time that is short.

Abstract: The invention relates to a device (100) for identifying or authenticating a person by a print thereof, the identification or authentication device (100) including: a bearing means (102, 130) including a transparent base (130) and a transparent block (102) supported by said base (130) on which the part of the body carrying the print is pressed, the surface of the transparent block (102) on which the part of the body carrying the print is pressed having a test chart (132), the transparent block (102) being made of a flexible material that deforms and fits the shape of the part of the body carrying the print when the latter is pressed against the former, a means (106, 126) for capturing an image of said print and the test chart (132) through said bearing means (102, 130), a means (108) for analyzing the image of the deformed test chart (132), a means (110) for constructing a template of the print according to the print thus captured and the image of the test chart (132) thus analyzed, a means (114) for verifying

Abstract: The invention relates to a method for validating a biometrical acquisition, mainly the acquisition of a body imprint of a body area such as fingerprints or a face imprint, wherein the method involves together with the biometric acquisition: lighting the body area using at least one radiation having at least two respective different wavelengths between approximately 500 nm and 1150 nm; taking at least two reflectometry measurements concerning said and at least two wavelengths for measuring the reflection index of the tissues for these wavelengths; calculating the ratio for two measured indices; and comparing the ratio with a range of reference values characterizing a haemoglobin-containing living tissue in terms of proportions of oxygenated and non-oxygenated forms characteristic of the living states for the wavelengths in question; if the ratio is included in said range, the body area is considered as living and the biometrical acquisition is validated; and conversely, if the body area is considered as not li

Abstract: A method for identifying a person (200) by capturing an image of the iris producing an anamorphic transformation of the image along a horizontal axis and then a vertical axis to code it in the form of one or two models. The model is compared with reference models stored in a database to determine the identity of the person. The acquisition device captures the image of the iris through means of optical deformation to produce the anamorphic transformation of the image and then codes the image into the models.