Abstract: A biometric analysis method and a storage medium are provided. The biometric analysis method includes steps of acquiring a biometric image, acquiring a feature point in the biometric image, and storing descriptors corresponding to the feature point and corresponding relationship between the descriptors and the feature point. The biometric analysis method further includes a step of not storing the biometric image. The above solutions can effectively improve operational efficiency and user experience.

Abstract: A background subtraction method includes: obtaining a first background image corresponding to a first object, wherein the first object has a first reflectivity; obtaining a second background image corresponding to a second object, wherein the second object has a second reflectivity, and the first reflectivity is different from the second reflectivity; calculating a plurality of relative values of the first background image relative to the second background image so as to obtain a mask image; obtaining a target image; subtracting the second background image from the target image so as to obtain a first background-removed image; and calculating and outputting a second background-removed image according to the first background image, the second background image, the first background-removed image and the mask image.

Abstract: A touch panel includes: a substrate having a touch recognition area and a fingerprint recognition area; a plurality of first sensing electrodes in the touch recognition area on the substrate; and a first connection electrode connecting adjacent ones of the first sensing electrodes in a first direction. A portion of the first connection electrode adjacent to the fingerprint recognition area is bent along an edge of the fingerprint recognition area.

Abstract: The present application relates to the field of biometric identification technologies, and provides an under-screen optical fingerprint identification device and an electronic apparatus with the under-screen optical fingerprint identification device. The under-screen optical fingerprint identification device comprises a reflecting component, a lens and a fingerprint sensor; the reflecting component, the lens and the fingerprint sensor are provided on a fingerprint detection light path of the under-screen optical fingerprint identification device; the lens is provided on a reflection path of the reflecting component, and is configured to converge fingerprint light reflected by the reflecting component to the fingerprint sensor; an incident angle of the fingerprint light on the display screen is greater than or equal to a preset angle, the fingerprint light being reflected by a finger to the display screen and entering the fingerprint sensor through the fingerprint detection light path.

Abstract: The present invention relates to a method for transitioning a device controller comprised with an electronic device from an at least partly inactive mode to an at least partly active mode, wherein the method comprises: determining the area portion of a finger detecting structure being touched by an object; determining a force applied on the fingerprint sensing device. When the area portion of the finger detecting structure being touched by the object exceeds a predetermined threshold area portion, and the force exceeds a predetermined threshold force value, transitioning, using the pre-processing module, the device controller from the at least partly inactive mode to the at least partly active mode. The invention also relates to such an electronic device.

Abstract: Systems and methods described herein relate to fingerprint-on-display recognition. In particular, the systems and methods described herein may recognize a fingerprint when a finger of a user is placed on a display and authenticate the user based on the recognized fingerprint. Further, the embodiments described herein may utilize multiple colors and/or secondary factors to reduce erroneous authentications of the user. The approaches may improve the accuracy of fingerprint authentication by using the multiple colors and/or secondary factors.

Abstract: A method for determining an amount of ambient light illumination is disclosed. The method includes: estimating a contribution per color component in an optical sensing region of an input frame to be displayed on a display device, wherein the optical sensing region corresponds to a location of an optical sensor in the display device, wherein the input frame comprises digital information for each color component for each pixel of the input frame; causing the optical sensor to detect an amount of illumination in the optical sensing region based on illuminating the display device with a representation of the input frame; and determining the amount of ambient light illumination based on the estimated contribution per color component in the optical sensing region of the input frame and the amount of illumination in the optical sensing region detected by the optical sensor.

Abstract: A method, device and system for authentication in accordance with a SIM card is provided in the present disclosure. The method for authentication in accordance with the SIM card includes the following steps. First, the SIM card receives a feature code of a biometric feature information. Afterwards, the SIM card compares the feature code of the biometric feature information and a feature code stored in the SIM card for obtaining a comparison result. Afterwards, the SIM card returns the comparison result. Compared to existing technology, the above technical solution is configured to store the feature code in the SIM card and use it for authentication. The noncrackable SIM card protects a security of biometric feature information. After replacing the device, just plug the SIM card into the new device to complete the authentication and initialization of the new device. Therefore, the above technical solution avoids the initial setup of the new device and make it easy to use.

Abstract: A fingerprint identification method and device, a storage medium and a terminal are provided. The method includes: when a touch sensing unit senses a touch signal after a screen is touched by a fingerprint to be identified, a control unit sending a display drive signal to a display unit to light pixels of one or more discrete point light source regions in the display unit; and a photoelectric sensing unit receiving a scattered light signal formed by light from the pixels reaching a physiological tissue of a finger having the fingerprint to be identified, and a total reflection light signal formed by light from the pixels reaching the screen. True or false fingers may be easily identified and determined, which enhances security and reliability of a fingerprint identification system, and also ensures and improves quality of fingerprint imaging.

Abstract: A one-piece optical element (1) consisting of a material transparent to light, comprising a diaphragm (5) formed in the mass of said transparent material, the diaphragm (5) comprising an orifice consisting of said transparent material, suitable for the passage of light through said orifice, and a screen consisting of said transparent material surrounding said orifice (6), said screen opposing the passage of light therethrough and being formed by a succession of modified layers formed of the transparent material, separated from each other, and having a modified refractive index different from the refractive index of the transparent material in the rest of the optical element.

Abstract: The invention relates to the field of computer networks, in particular to mobile technologies. More specifically, the invention relates to methods for transmitting contact and other personal information. The method of transmitting personal information includes: receiving from a user with his mobile device having a sensor for scanning biometric data, or using specialized registration points equipped with computers with sensors for scanning biometric data, user's contact information and his biometric data, registration of the aforementioned user in the database located on the server, linking contact information to biometric data. And after a request containing a biometric data of a registered user initiated from a mobile device belonging to another user, the server will automatically provide contact and other personal information of the user who owns the biometric data to this mobile device.

Abstract: Described is an optical fingerprint system with varying integration times across pixels. A sensor selects blocks of pixels contacted or covered by an input to a region of a display. While a matcher attempts to authenticate the input with first blocks of pixels captured by the sensor, the sensor captures additional blocks of pixels for subsequent authentication if the first blocks fail. With more time to integrate the light reflected off the input, each additional block of pixels include more detail than previously captured blocks. If authentication fails based on the first blocks, the matcher can reattempt authentication using the additional blocks without delay. Repeating this process enables the system to authenticate input using very large or high-resolution images while minimizing latency and power consumed to authenticate the input.

Abstract: A method for fingerprint enrollment, a terminal, and a non-transitory computer readable storage medium are provided. The method includes the following. An enrolled fingerprint image is acquired. The enrolled fingerprint image is compared with a preset fingerprint template. Fingerprint ID of the preset fingerprint template is determined as fingerprint ID of the enrolled fingerprint image when the enrolled fingerprint image matches the preset fingerprint template. New fingerprint ID is generated as the fingerprint ID of the enrolled fingerprint image when the enrolled fingerprint image fails to match the preset fingerprint template.

Abstract: Aspects of the present disclosure include methods for generating a sampled profile including a plurality of sampling points having a plurality of characteristic values associated with the detected non-visible light, identifying one or more macroblocks each includes a subset of the plurality of sampling points, calculating a number of occurrences of the local pattern value within each subset of the plurality of the sampling points for each of the one or more macroblocks, generating a first array including a plurality of weighted values by calculating the plurality of weighted values based on the numbers of occurrences of the local pattern value and corresponding sizes of the one or more macroblocks, assigning a unique index to each of the plurality of weighted values, generating a second array of the unique index by ranking the plurality of weighted values, and generating a third array including a plurality of ranking distances.

Abstract: Aspects of the present disclosure include methods for generating a sampled profile including a plurality of sampling points having a plurality of characteristic values associated with the detected non-visible light, identifying one or more macroblocks each includes a subset of the plurality of sampling points, calculating a number of occurrences of the local pattern value within each subset of the plurality of the sampling points for each of the one or more macroblocks, generating a first array including a plurality of weighted values by calculating the plurality of weighted values based on the numbers of occurrences of the local pattern value and corresponding sizes of the one or more macroblocks, assigning a unique index to each of the plurality of weighted values, generating a second array of the unique index by ranking the plurality of weighted values, and generating a third array including a plurality of ranking distances.

Abstract: Methods, systems and computer program products for providing improved visualization of inspection results are provided. Aspects include receiving an image from a connected camera by a computing device and processing the image by a graphics processing unit to divide the image into a plurality of image blocks. Responsive to inputting the processed image into a trained model, a plurality of image areas within the processed image is identified. Each image area is associated with an importance level and includes a unique set of image blocks. A sequence of image blocks is determined based on an importance level associated with each of the plurality of image blocks, wherein the sequence includes a list of image blocks in descending order by the importance level of each image block. The image blocks are stored in order of the sequence of image blocks by the server.

Abstract: Fingerprint recognition driving circuit and method, fingerprint recognition module and touch screen are provided. The circuit includes: a first charge storing sub-circuit, a data acquiring sub-circuit configured to write output voltage of an ultrasonic sensor into a first end of the first charge storing sub-circuit, a driving sub-circuit including a driving transistor, a second charge storing sub-circuit, a circuit compensating sub-circuit configured to charge the second charge storing sub-circuit through the first charge storing sub-circuit and the driving transistor ill potential at a first end of the second charge storing sub-circuit equals the sum of output voltage of the ultrasonic sensor and threshold voltage of the driving transistor, and an output controlling sub-circuit configured to transmit a current signal output by the driving transistor to a signal reading circuit.

Abstract: Techniques regarding self-sterilizing touch sensors are provided. For example, one or more embodiments described herein can comprise an apparatus, which can comprise a heating element. Also, the apparatus can comprise a protective layer adjacent to the heating element. The heating element can generate heat based on a pressure applied to the protective layer and can sterilize the protective layer.

Abstract: An electronic device includes a display, a memory configured to store instructions, a fingerprint sensor configured to obtain first fingerprint information regarding a finger contacting the display, and a processor, and when executing the instructions, the processor is configured to while displaying a first screen on the display, receive a first drag input from a user's finger contacting the display; obtain the first fingerprint information regarding the finger by using the fingerprint sensor while the first drag input is maintained; and, based on it being identified that the fingerprint information matches first reference fingerprint information, display a second screen converted from the first screen at least partially on the display.

Abstract: Provided is a display device including a base substrate including a display area and a non-display area adjacent to the display area, a display element layer disposed on an upper portion of the base substrate, a sensor part disposed on a lower portion of the base substrate, and a sensing circuit board disposed on the lower portion of the base substrate and generating an electric field in response to an input from outside. The sensing circuit board includes a main board including a first opening part exposing the sensor part, and an auxiliary board overlapping the sensor part, disposed on the main board, and electrically connected to the main board.

Abstract: The present disclosure provides a driving circuit and a driving method thereof, an array substrate, a display device, and a driving method thereof. The driving circuit is applied for driving a light-emitting element and a fingerprint detection element, and includes: a driving sub-circuit, outputting a light-emitting driving current to the light-emitting element under the control of a driving node; a data writing sub-circuit, communicating a data input terminal with the driving node in response to a scanning signal of a scanning signal terminal; a first energy storage sub-circuit, coupled to the driving node and a control signal terminal; a detection sub-circuit, outputting a detection current under the control of an output terminal of the fingerprint detection element; and a data output sub-circuit, outputting a detection current to the data output terminal in response to the scanning signal of the scanning signal terminal.

Abstract: In a method for generating an estimated fingerprint image, a ridge/valley pattern of a fingerprint of a finger is received. A sensor image including a partial fingerprint of the finger is received. Ridge/valley characteristics of the fingerprint are extracted from the sensor image including the partial fingerprint. An estimated fingerprint image is generated based at least on the ridge/valley pattern of the fingerprint and the ridge/valley characteristics of the fingerprint.

Abstract: A fingerprint enrollment method applied to generate a fingerprint enrollment template includes the steps of obtaining a fingerprint image; obtaining a group of features corresponding to the fingerprint image; determining whether there being temporary enrollment data; when there being no temporary enrollment data, generating temporary enrollment data according to the group of features and displaying a feature image corresponding to the group of features on a display interface; when there being temporary enrollment data, according to a relative-position relationship between the group of features and the temporary enrollment data, displaying the feature image corresponding to the group of features on the display interface, and incorporating the group of features into the temporary enrollment data; and determining whether the temporary enrollment data satisfying with an enrollment completion condition.

Abstract: An electronic device includes: a fingerprint input unit located in one area of the electronic device to receive a fingerprint of a user; and a controller configured to control a display unit to display information on a fingerprint registration progress situation in correspondence to a plurality of fingerprints that are sequentially input to the fingerprint input unit, determine whether a fingerprint of the user is to be registered according to the fingerprint registration progress situation information, and register a fingerprint of the user by using at least some of the plurality of fingerprints. A fingerprint registration progress situation can be identified when a fingerprint is registered.

Abstract: The disclosure relates to a user equipment (UE) and a method and apparatus for identifying a handprint. The user equipment includes a housing including a front housing, a rear housing, and a middle frame located between the front housing and the rear housing; at least one ultrasound handprint sensor located on an inner wall of the middle frame, and configured to emit an ultrasound capable of passing through the middle frame, receive an ultrasound reflected by a hand of a user, and generate an electric signal of handprint information based on the ultrasound reflected by the hand of the user; and a controller located inside the housing, electrically connected to the at least one ultrasound handprint sensor, and configured to control the at least one ultrasound handprint sensor, and convert the electric signal of the handprint information collected by the at least one ultrasound handprint sensor into a handprint image.

Abstract: Disclosed is a device comprising: a light guide configured to receive incident light from one or more light sources; a cover layer with a sensing surface configured to receive an input object to be sensed; and a set of photodetectors. The light guide includes diffraction gratings configured to diffract the incident light as diffracted light, wherein the diffracted light exits the light guide and travels towards the sensing surface. The diffracted light is reflected from the sensing surface as reflected light. The reflected light is sensed by the set of photodetectors to form an image of the input object.

Abstract: A photo-sensing detection apparatus is provided. The photo-sensing detection apparatus includes a counter substrate; an array substrate facing the counter substrate; and a fingerprint sensing driver. The array substrate includes a plurality of light sources configured to emit light toward the counter substrate, at least a portion of the light being totally reflected by a surface of the counter substrate away from the array substrate; and a photosensor configured to detect the at least the portion of the light being totally reflected by the surface of the counter substrate away from the array substrate. The photo-sensing detection apparatus is configured to be operated in a time-division mode including a plurality of time-sequential photo-sensing modes. The fingerprint sensing driver is configured to detect a fingerprint information by integrating signals detected in the plurality of time-sequential photo-sensing modes.

Abstract: Provided are a method and apparatus for fingerprint identification and an electronic device, which could increase a speed of fingerprint identification. The method is applied to an electronic device including M fingerprint sensors, and the method includes: acquiring pressing information of a finger in a fingerprint detecting region; determining a target sub-region among N sub-regions according to the pressing information, where the N sub-regions cover the fingerprint detecting region, M and N are positive integers greater than 1, and N>M; and determining a data acquiring region according to the target sub-region, where fingerprint data in the data acquiring region is used for fingerprint identification.

Abstract: In one aspect, a sensor includes an image acquisition controller and a pixel array. The pixel array includes a first set of pixels electrically coupled to the controller and a second set of pixels electrically coupled to the controller. The sensor is configured to operate in a first mode and a second mode. When operating in the first mode, the controller is configured to acquire signals from only the first set of pixels for generating a low-resolution image. When operating in the second mode, the controller is configured to acquire signals from both the first set of pixels and the second set of pixels for generating a high-resolution image.

Abstract: A spatial frequency based capacitive motion system and method of operating the same are disclosed. In one embodiment, the system includes an array of sense cells to sense capacitance variations induced by a detected surface in proximity to the array. The system further includes processing circuitry including one or more differential detectors and a processor to process output signals from the one or more differential detectors to measure displacement of the detected surface in a direction parallel to the array. Other embodiments are also disclosed.

Abstract: A display device and an operation method thereof are disclosed. The display device includes a display panel, a pressure sensor, a skin texture sensor, and a controller. The skin texture sensor and the pressure sensor are respectively coupled to the controller; the pressure sensor is configured to detect a pressing action on a display side of the display panel; the skin texture sensor is configured to detect a skin texture image of a user touching the display side of the display panel; and the controller is configured to awaken the skin texture sensor when the pressure sensor detects the pressing action. The display device reduces power consumption of the fingerprint detection.

Abstract: The invention provides a fingerprint sensing device. A control circuit controls a part of point light sources to irradiate a fingerprint of a user. Reflected light generated by using the plurality of point light sources to irradiate the fingerprint of the user forms a light-emitted pattern including a plurality of reflected light patterns on a sensing layer, wherein each of the reflected light patterns is provided by a corresponding point light source, and each of the sensing units senses the reflected light patterns corresponding to at least two point light sources.

Abstract: Disclosed are a display device and a control method. The display device includes: a transparent substrate; a transflective film disposed on a first side of the transparent substrate; a display screen disposed on a second side of the transparent substrate, the first side being opposite to the second side; and an infrared gesture recognition circuit disposed on the second side of the transparent substrate, where an orthographic projection of the infrared gesture recognition circuit on the transparent substrate and an orthographic projection of the display screen on the transparent substrate do not overlap each other; and the infrared gesture recognition circuit is configured to recognize a gesture at a side of the transflective film and control interface display of the display screen according to the determined operation gesture.

Abstract: A method for controlling a digital device according to the present application can control the device so as to execute a command corresponding to a single fingerprint or a plurality of fingerprints using a sheet capable of simultaneously recognizing a plurality of fingerprints. Accordingly, a user's usability can be greatly improved, and a complicated encryption function using a plurality of fingerprints can be implemented, so that the security of the digital device can be greatly improved.

Abstract: An electronic device is configured to analyze movement data generated by a sensor (e.g., an accelerometer assembly) in the electronic device to determine if the electronic device should be activated from a reduced power state. A control circuit in the electronic device can compare the movement data to a predetermined movement pattern to determine whether the movement should be ignored, or if the movement is consistent with a user shaking the electronic device to activate the electronic device. As a result of this approach, erroneous activation of the electronic device is avoided, thereby preventing the electronic device from needlessly depleting its battery before deployment by the end user.

Abstract: An electronic device is provided, the electronic device having a keyboard including a biometric input device. The biometric input device may be a biometric key or button. A cap of a biometric key or button may include a textured ceramic cover, such as a textured sapphire cover. The cap may further include a rear decorative coating and a front antireflective coating disposed on or over the textured ceramic cover. The cap may have one or more visual and or tactile properties which resemble those of an adjacent key of the keyboard.

Abstract: It is provided a biometric authentication system, which is configured to execute authentication by using registered biometric information, the biometric authentication system comprising: a light source unit configured to irradiate a living body with light; an image pickup unit configured to photograph a vessel image with light radiated from the light source unit and transmitted through the living body; a control unit configured to generate authentication biometric information from the vessel image photographed by the image pickup unit; a category selection unit configured to select a category that corresponds to the authentication biometric information, based on supplementary information including information that has been obtained about a position and posture of the living body at timing of photographing the vessel image; and an authentication unit configured to execute authentication processing by comparing registered biometric information of the selected category and the authentication biometric informatio

Abstract: A fingerprint scanner for capturing fingerprints of infant children is described. The fingerprint scanner includes a transparent tube configured for an infant child hand and an array of camera sensors spaced apart on the transparent tube so that each camera sensor captures an overlapping part of an image captured by its neighboring camera sensor. The array of camera sensors is arranged below a surface, along a periphery of a circumference and substantially along a length of the transparent tube up to a processor compartment. The fingerprint scanner also includes a processing circuitry configured to: simultaneously receive multiple images from the array of camera sensors, and process the multiple images including merging the multiple images to remove overlapping portions and recover a single image of the infant child's fingertips and palm.

Abstract: A fingerprint sensor for a display device capable of suppressing loss of light due to diffraction of light and a display device with this fingerprint sensor are provided. A fingerprint sensor for a display device having a plurality of photosensors arranged in a matrix, each of the photosensors has a semiconductor film for converting incident light into an electric signal, and a bottom gate electrode as a light shielding film arranged on a lower layer side of the semiconductor film for blocking incident light from the lower layer side to the semiconductor film, wherein the bottom gate electrode has four corner portions in an outer contour shape in a top view, and each of the corner portions is rounded.

Abstract: The embodiments of this disclosure provide a display device and a control method thereof. The display device comprises a display panel including a plurality of photosensitive sensing units and the display device further comprising: a light-transmitting hole forming layer, a liquid crystal lens layer, and a light guide layer arranged on a display side of the display panel and in sequence in a direction away from the display panel, and a light source arranged on a side of the light guide layer. The light-transmitting hole forming layer is switchable between a light-transmitting state and a pinhole state, in which the light-transmitting hole forming layer forms light-transmitting holes facing each photosensitive sensing unit; the liquid crystal lens layer is switchable between a non-lens state and a lens state, in which the liquid crystal lens layer forms a convex lens facing each of the photosensitive sensing units.

Abstract: An authentication information processing method for an authentication information processing device including a processor and a memory includes acquiring an image, determining a base point representing a sweat pore on a ridge of skin from the acquired image, and acquiring position information. The authentication information processing method includes extracting a predetermined number of the base points whose distance from the central base point is less than a predetermined value and for which a number of troughs between adjacent two of the ridges of the skin positioned between the central base point and each of the predetermined number of base points is equal to or less than one, as peripheral base point. The authentication information processing method includes generating sweat pore-related information associating the position information of the central base point with attribute information, and causing the memory to store the generated sweat pore-related information.

Abstract: A piezo haptic keyboard and touchpad user identification system may comprise a processor receiving an authenticating user input identifying an authorized user of the information handling system, and a controller operably connected to a plurality of piezo electric elements situated beneath the keyboard. The controller may detect haptic hardware typing or touch behavior parameters describing characteristics of a plurality of deformations of the piezo electric elements during interaction between the authorized user and the keyboard, and the processor may use machine learning to identify a repeated pattern of values for a combination of the haptic hardware typing or touch behavior parameters reoccurring during interaction between the authorized user and keyboard. The processor may associate the repeated pattern of values for the combination of the haptic hardware typing or touch behavior parameters with the authorized user for later, passive authentication of a user based on typing dynamics.

Abstract: There is provided a display arrangement comprising an ultrasonic biometric sensing device. The display arrangement comprises: a cover plate having a sensing surface configured to be touched by a finger; a display panel comprising a plurality of sub-layers; a plurality of ultrasonic transducers arranged along the periphery of the display arrangement and outside of an active display area of the display arrangement, each ultrasonic transducer comprising a top and bottom electrode; and ultrasonic transducer control circuitry to control the ultrasonic transducers to determine properties of an object in contact with the sensing surface. One of the sub-layers in the display panel comprises a protruding portion extending outside of an area of any other sub-layer located between the sub-layer comprising the protruding portion and the cover plate, and the plurality of ultrasonic transducers are arranged on the protruding portion between the protruding portion and the cover plate.

Abstract: Two factor identification verification of controlled-environment facility residents and associated non-residents systems and methods capture, via a controlled-environment facility associated communications device, by a controlled-environment facility communications processing system, a first type of biometric sample of a user. The controlled-environment facility communications processing system submits the first type of biometric sample of the user to a centralized investigative data aggregation and analysis system, which verifies the user using the first type of biometric sample and determining. When the system(s) determine that a certainty of this resulting verification of the user does not meet a predetermined certainty threshold a second type of biometric sample of the user is captured and submitted for verification of the user.

Abstract: Methods and systems for suppressing clutter effects in ultrasonic imaging systems are presented. Two or more receive beams with different and distinct beam patterns are employed for each reception boresight and each reception phase center. The clutter suppression processing is applied to the beamformed data, and is based on computing one or more features for each range-gate. These features may include variability features, providing an estimate of the variability of the signal received by the different elements of the transducer array for the range-gate, and/or derivative/slope features that are an estimation of a function of spatial derivatives of the signal received by the different elements of the transducer array for the range-gate.

Abstract: The disclosure discloses an electronic device. The electronic device includes a touch module, a fingerprint reader and a display module. The fingerprint reader is disposed on the touch module. The display module is disposed under the touch module. An orthogonal projection of the display module on the fingerprint reader overlaps that of the fingerprint reader.

Abstract: An electronic device and a fingerprint sensing control method thereof are provided. A sensing region of a display panel is divided into a plurality of fingerprint zones. The electronic device determines at least one target fingerprint zone from the fingerprint zones according to a touched area. The electronic device scans the at least one target fingerprint zone for performing fingerprint sensing. The electronic device performs an accelerated reading operation. The accelerated reading operation includes: reading at least one sensing signal from the at least one target fingerprint zone; and skipping reading at least one of the fingerprint zones other than the at least one target fingerprint zone among the fingerprint zones.

Abstract: The present invention relates to a method and an apparatus for processing a distortion of a fingerprint image.

Abstract: 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 (21) of a client (2), of steps of: (a) Binarization of said input image by means of a convolutional neural network, CNN, in such a way as to generate an image called binary; (b) Processing said binary image so as to extract said features of interest from the fingerprint represented by said input image.

Abstract: A method may involve estimating a force applied by a target object on a surface, determining at least one ultrasonic fingerprint sensor parameter modification based, at least in part, on the force and updating at least one setting of an ultrasonic fingerprint sensor based, at least in part, on the ultrasonic fingerprint sensor parameter modification. The method may involve controlling the ultrasonic fingerprint sensor to transmit first and second ultrasonic waves towards the target object and receiving first and second ultrasonic receiver signals, including signals corresponding to reflections of the first and second ultrasonic waves from the target object, from the ultrasonic fingerprint sensor. The method may involve performing an authentication process based, at least in part, on the first and second ultrasonic receiver signals.