Abstract: Method for forming an enrolled fingerprint template for a user of a fingerprint touch sensor. The method comprising: during a touch event in which a finger of the user is placed on the fingerprint sensor, capturing a plurality of images of the finger and comparing two of the images to determine if there is a valid transformation. If there is no valid transformation, images are compared against image quality and coverage thresholds to determine if any of the captured images are to be used for enrollment.

Abstract: Method for forming an enrolled fingerprint template for a user of a fingerprint touch sensor. The method comprising: during a touch event in which a finger of the user is placed on the fingerprint sensor, capturing a plurality of images of the finger and comparing two of the images to determine if there is a valid transformation. If there is no valid transformation, images are compared against image quality and coverage thresholds to determine if any of the captured images are to be used for enrollment.

Abstract: The present disclosure relates to a method of amending a fingerprint template for a user of a smart card, where the user of the smart card is progressively enrolling based on comparison and/or using a separate credential such as a PIN code. The present disclosure also relates to a corresponding smart card and to a computer program product.

Abstract: A method for providing user input on an electronic device comprising a fingerprint sensor comprising an array of sensing elements. Acquiring partial fingerprint images of a finger touching a finger touch surface of the fingerprint sensor from at least two sub-groups of sensing element. Determining a respective force value indicative of a force applied on the finger touch surface at each of the sub-groups of sensing elements when the partial fingerprints were acquired, based on the partial fingerprint images acquired from the respective sub-group of sensing elements. Determining a force value difference between a pair of the determined force values. Determining a user input based on the determined force value difference, and based on the relative location between the sub-groups of sensing elements in the pair associated with the force value difference.

Abstract: The present disclosure generally relates to a method of authenticating a user, using an electronic device comprising a fingerprint sensor, and more specifically to improvements in relation to how to acquiring an authentication fingerprint image for use in authenticating the user. The present disclosure also relates to a corresponding electronic device and to a computer program product.

Abstract: The present invention relates to a method for progressively enrolling a user of a smart card, specifically applying a multi-step activation process for enabling fingerprint authentication for the smart card. The invention also relates to a corresponding smart card and to a computer program product. The present invention provides a solution for seamless fingerprint enrollment for a smart card user.

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: A method for determining a finger motion on a fingerprint sensor comprising a sensing area, the method comprises: receiving a finger on the sensing area of the fingerprint sensor; when an amount of sensor area coverage caused by the finger touching the sensing area is below a coverage threshold, acquiring images of a first type using a first image acquisition setting with the fingerprint sensor, when the amount of sensor area coverage is equal to or exceeds the coverage threshold, acquiring images of a second type using a second image acquisition setting with the fingerprint sensor, and determining a present motion of the finger on the fingerprint sensor based on the first type of images or the second type of images depending on a present amount of sensor area coverage.

Abstract: The present disclosure relates to a method of determining that a finger is in stable contact with a surface covering a sensor area of a fingerprint sensor. The method comprises, by means of the fingerprint sensor, acquiring a time-sequence of images of the fingerprint of the received finger. The method also comprises, for each image of the time-sequence, dividing an image area of the image, corresponding to the sensor area of the fingerprint sensor, into a plurality of image regions (r), said regions partly overlapping each other and covering the whole image area. The method also comprises, based on image analysis of each of the plurality of image regions of each image of the time-sequence, determining that the finger is in stable contact with the surface covering the sensor area.

Abstract: A method for providing user input on an electronic device comprising a fingerprint sensor comprising an array of sensing elements. Acquiring partial fingerprint images of a finger touching a finger touch surface of the fingerprint sensor from at least two sub-groups of sensing element. Determining a respective force value indicative of a force applied on the finger touch surface at each of the sub-groups of sensing elements when the partial fingerprints were acquired, based on the partial fingerprint images acquired from the respective sub-group of sensing elements. Determining a force value difference between a pair of the determined force values. Determining a user input based on the determined force value difference, and based on the relative location between the sub-groups of sensing elements in the pair associated with the force value difference.

Abstract: The present disclosure generally relates to a method of authenticating a user, using an electronic device comprising a fingerprint sensor, and more specifically to improvements in relation to how to acquiring an authentication fingerprint image for use in authenticating the user. The present disclosure also relates to a corresponding electronic device and to a computer program product.

Abstract: A method for determining a finger motion on a fingerprint sensor comprising a sensing area, the method comprises: receiving a finger on the sensing area of the fingerprint sensor; when an amount of sensor area coverage caused by the finger touching the sensing area is below a coverage threshold, acquiring images of a first type using a first image acquisition setting with the fingerprint sensor, when the amount of sensor area coverage is equal to or exceeds the coverage threshold, acquiring images of a second type using a second image acquisition setting with the fingerprint sensor, and determining a present motion of the finger on the fingerprint sensor based on the first type of images or the second type of images depending on a present amount of sensor area coverage.

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: The present disclosure relates to a method performed in an electronic device comprising a fingerprint sensor. For each of a plurality of consecutive sub-templates, the method comprises determining that a fingerprint is in proximity to the fingerprint sensor as part of an interaction with the fingerprint sensor; extracting the sub-template from a captured image of the fingerprint; obtaining an indication about whether the fingerprint was in proximity to the sensor also during a time period prior to the determining; defining the interaction as a slide interaction if the fingerprint was in proximity or as a touch interaction if the fingerprint was not in proximity; and based on whether the interaction is defined as a slide interaction or a touch interaction, advancing an enrolment progress. When the enrolment progress is above a predetermined threshold, a template compiled from the sub-templates is enrolled.

Abstract: The present disclosure relates to a method of controlling an electronic device, the electronic device comprising a fingerprint sensor. The present disclosure also relates to a corresponding electronic device and to a computer program product.

Abstract: The present disclosure relates to a method of determining that a finger is in stable contact with a surface covering a sensor area of a fingerprint sensor. The method comprises, by means of the fingerprint sensor, acquiring a time-sequence of images of the fingerprint of the received finger. The method also comprises, for each image of the time-sequence, dividing an image area of the image, corresponding to the sensor area of the fingerprint sensor, into a plurality of image regions (r), said regions partly overlapping each other and covering the whole image area. The method also comprises, based on image analysis of each of the plurality of image regions of each image of the time-sequence, determining that the finger is in stable contact with the surface covering the sensor area.

Abstract: The present disclosure relates to a method of determining that a finger covers a sensor area of a fingerprint sensor. The method comprises, on a surface of the fingerprint sensor, receiving a finger having a fingerprint topography. The method also comprises, by means of the fingerprint sensor, acquiring an image of the fingerprint of the received finger. The method also comprises dividing an image area of the acquired image, corresponding to the sensor area of the fingerprint sensor, into a plurality of image regions (r), said regions partly overlapping each other and covering the whole image area. The method also comprises, based on image analysis of each of the plurality of image regions, determining that the finger covers the whole sensor area.

Abstract: The present disclosure relates to a method performed in an electronic device comprising a fingerprint sensor. For each of a plurality of consecutive sub-templates, the method comprises determining that a fingerprint is in proximity to the fingerprint sensor as part of an interaction with the fingerprint sensor; extracting the sub-template from a captured image of the fingerprint; obtaining an indication about whether the fingerprint was in proximity to the sensor also during a time period prior to the determining; defining the interaction as a slide interaction if the fingerprint was in proximity or as a touch interaction if the fingerprint was not in proximity; and based on whether the interaction is defined as a slide interaction or a touch interaction, advancing an enrolment progress. When the enrolment progress is above a predetermined threshold, a template compiled from the sub-templates is enrolled.

Abstract: The present disclosure relates to a method of controlling an electronic device, the electronic device comprising a fingerprint sensor. The present disclosure also relates to a corresponding electronic device and to a computer program product.

Abstract: A method of classifying a finger touch in respect of a finger pressure on a surface of a fingerprint sensor, comprising the steps of: receiving, on the surface of the fingerprint sensor, a finger having a fingerprint topography; acquiring a first time-sequence of fingerprint images; determining a reference value of at least one image-related parameter indicative of a compression of the fingerprint topography, based on at least one fingerprint image in the first time-sequence of fingerprint images; acquiring a second time-sequence of fingerprint images; determining a test value of the at least one image-related parameter based on at least one fingerprint image in the second time-sequence of fingerprint images; and classifying the finger touch based on a relation between the test value and the reference value.