The present invention relates to a method for producing a biometric image using an optical biometric imaging arrangement including a set of micro lenses adapted to redirect incoming light onto a photodetector pixel array, the method comprising: capturing a biometric image including a set of sub-images using an optical biometric imaging device; estimating a spatial transformation between the at least one biometric sub-image and corresponding masking calibration sub-images; applying the spatial transformation to retrieved illuminance calibration sub-images adapted for illuminance calibration for captured biometric sub-images to align the illuminance calibration sub-images with the biometric image; and normalizing the biometric sub-images using the aligned calibration sub-images for providing a normalized biometric image based on the normalized biometric sub-images.

A gesture recognition system and a gesture recognition method are provided. The gesture recognition system includes a fingerprint sensor and a processing circuit. The processing circuit obtains a first fingerprint image and a second fingerprint image through the fingerprint sensor. The processing circuit obtains a plurality of first coordinate parameters of a plurality of first coordinate points in the first fingerprint image, and obtains a plurality of second coordinate parameters of a plurality of second coordinate points in the second fingerprint image. The first coordinate points of the first fingerprint image and the second coordinate points of the second fingerprint image respectively have a plurality of grayscale values corresponding to each other. The processing circuit determines a gesture operation according to the first coordinate parameters and the second coordinate parameters.

A first period when detection of a detection target body in contact with or proximity to a sensor is performed and a second period when detection of asperities on a surface of the detection target body is performed are set. First regions are set in a detection region of the sensor as input keys for a password. In the first period, one of segmented regions obtained by dividing a second region the center of which corresponds to coordinates of a touch detection position when the touch detection position for inputting of the password is detected in one of the first regions. In the second period, based on priorities set in advance according to the number of feature points of the detection target body, a segmented image detected in the segmented region for the inputting is output, and a certain number of segmented images are synthesized to generate a fingerprint image.

A method for identifying a fingerprint, includes: performing a plurality of signal load operations on a plurality of transmit electrodes; in response to performing the signal load operations on the transmit electrodes, acquiring a fingerprint signal by a target electrode of the receive electrodes; and identifying a fingerprint based on acquired fingerprint signals.

According to an aspect, a detection device includes: a plurality of optical sensors arranged in a matrix having a row-column configuration; and an optical filter provided facing a surface for detecting light with the optical sensors. The optical filter includes a base configured not to transmit light and a plurality of apertures provided in the base and configured to transmit light. An arrangement of the apertures in the base comprises an arrangement in which the apertures are arranged spirally outward clockwise from a predetermined area and arrangement in which the apertures are arranged spirally outward counterclockwise from the predetermined area. The predetermined area contains a predetermined point.

A method for fingerprint authentication may include obtaining a target fingerprint region including at least one first fingerprint feature set, judging, according to the at least one first fingerprint feature set and fingerprint feature sets included in a plurality of reference fingerprint regions of a fingerprint database, whether a primary reference fingerprint region associated with the target fingerprint region is included in the fingerprint database, where the plurality of fingerprint regions are formed during fingerprint acquisition of a finger performing arc-shaped sliding on a fingerprint identifier and stored in the fingerprint database, and each of the reference fingerprint regions has a corresponding fingerprint feature, and determining, based on a judgment result, whether the target fingerprint region passes the authentication. The reference fingerprint regions can be acquired quickly in a swiping mode, and an associated reference fingerprint region can be used for fingerprint authentication, thereby significantly speeding up the authentication process.

A fingerprint sensing system. The fingerprint sensing system includes: at least one sensor; at least one display device; at least one application processor; and at least one secure enclave processor. The application processor(s) receives fingerprint data from the sensor(s) and provides the fingerprint data to the secure enclave processor(s). The secure enclave processor(s) decodes the fingerprint data and provides a signal indicative of at least one matched node. The application processor(s), responsive to receipt of the signal indicative of the matched node(s), presents at least a portion of a synthetic fingerprint image via at least one display device corresponding to the matched node(s).

A multiple-lens optical fingerprint reader for reading fingerprints through a display has a spacer; and multiple microlenses with concave and convex surfaces in a microlens array, each microlens of multiple lenses focuses light arriving at that microlens from a finger adjacent the display through the spacer forms an image on associated photosensors on a photosensor array of an image sensor integrated circuit. A method of verifying identity of a user includes illuminating a finger of the user with an OLED display; focusing light from the finger through arrayed microlenses onto a photosensor array, reading the array into overlapping electronic fingerprint images; extracting features from the overlapping fingerprint images or from a stitched fingerprint image, and comparing the features to features of at least one user in a library of features and associated with one or more fingers of one or more authorized users.

The invention relates to a papillary print sensor comprising an acquisition surface (14) extending over a length L, a light source (11) configured to emit a light pulse, a sheet (12) adapted to propagate light rays by reflection on the first face (12a) and the second face (12b), which defines a critical angle (θ.sub.c), and an imager (13), wherein the thickness (e) of the sheet is less than a thickness e.sub.max=L/2×tan(θ.sub.c), such that a first part of the light rays (20b, 20c) is propagated without reflection on the acquisition surface (14) while a second part of the light rays (20a, 20d) is reflected towards said acquisition surface (14) after reflection on the second face (12), and the imager (13) is configured to acquire a first image during the reception of the first part of the light rays and a second image during the reception of the second part of the light rays.

In accordance with a first aspect of the present disclosure, an enrollment device is provided, comprising: a token interface unit configured to couple the enrollment device to an external user authentication token; a user interface unit configured to provide visual information to a user through a plurality of optical output elements, said visual information being indicative of a progress of a biometric template enrollment in the authentication token; a user interface control unit configured to receive input data indicative of said progress from the authentication token through the token interface unit and to control the user interface unit using said input data.