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公开(公告)号：US09600706B2
公开(公告)日：2017-03-21
申请号：US15188473
申请日：2016-06-21
Applicant: Fingerprint Cards AB
Inventor： Morten Hansen , Fredrik Ramberg , Hans Thörnblom
IPC: G06K9/00
CPC classification number: G06K9/0002 , G06K9/00067
Abstract: An apparatus and a computer-implemented method of acquiring a fingerprint image from a fingerprint sensor with an array of sensor elements spanning a sensing area, comprising: monitoring groups of sensor elements located at group-wise spaced apart positions in the array of sensor elements, to determine a touch event occurring on the array of sensor elements; from the array of sensor elements, acquiring, at respective points in time, fingerprint sub-images which are confined in size to a subarea of the sensing area; as the fingerprint sub-images are acquired, computing values of a statistical indicator for the fingerprint sub-images; and acquiring a full fingerprint image when a predefined criterion indicates that the values of the statistical indicator has reached or is about to reach a stable state.
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公开(公告)号：US11216639B2
公开(公告)日：2022-01-04
申请号：US16619185
申请日：2018-05-31
Applicant: FINGERPRINT CARDS AB
Inventor： Morten Hansen , Klaus S. Andersen , Morten Jensen , Morten With Pedersen
Abstract: The method comprises capturing a plurality of images of a single biometric object during a single activation of a biometric sensor and ranking the images based on a ranking metric value of each of the images to determine a highest ranked image and at least one non-highest ranked image. The method comprises comparing, in a first matching attempt for the biometric object, the highest ranked image to templates of a plurality of pre-stored biometric object templates, wherein a matching metric is determined for each compared template, and generating a match indicating signal when it is determined that at least one of the matching metrics exceeds a matching threshold value. When it is determined that none of the matching metrics exceed the matching threshold value, one of the non-highest ranked images is compared, in a further matching attempt, to templates of the plurality of templates based on the matching metrics.
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3.发明授权公开(公告)号：US10325168B2
公开(公告)日：2019-06-18
申请号：US15807777
申请日：2017-11-09
Applicant: Fingerprint Cards AB
Inventor： Morten Hansen , Morten With Pedersen
Abstract: The invention relates to a method performed by a fingerprint sensing system of determining if a finger contacts a fingerprint sensor of the system, and a fingerprint sensing system performing method. In a first aspect of the invention, a method performed by a fingerprint sensing system is provided for determining if a finger contacts a fingerprint sensor of the fingerprint sensing system. The method comprises capturing an image of an object contacting the fingerprint sensor, determining an intensity for a plurality of pixels of the captured image, estimating local curvatures of pixel intensity variation in the captured image, and determining from the estimated local curvatures if local pixel intensity variation is dominated by a single direction, in which case the object on the sensor is considered to constitute a finger.
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Patent Agency Ranking
公开(公告)号：US11288488B2
公开(公告)日：2022-03-29
申请号：US16623203
申请日：2018-06-27
Applicant: FINGERPRINT CARDS AB
Inventor： Klaus S. Andersen , Morten Hansen
Abstract: The invention relates to a fingerprint sensing system and a method of the fingerprint sensing system of enabling authentication of a user based on fingerprint data captured by a fingerprint sensor of the fingerprint sensing system. The method comprises capturing at least one image of a fingerprint of a user's finger contacting the fingerprint sensor, acquiring a stored image comprising impairment data caused by impairments that the fingerprint sensor is subjected to, extracting fingerprint feature data from the captured at least one image, extracting impairment feature data from the acquired image, and comparing at least a subset of the extracted fingerprint feature data to at least a subset of the extracted impairment feature data of the acquired image, and if there is a match the user is not authenticated.
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公开(公告)号：US11170196B2
公开(公告)日：2021-11-09
申请号：US16609274
申请日：2018-04-20
Applicant: FINGERPRINT CARDS AB
Inventor： Morten Hansen , Klaus Andersen , Arne Husth , Michael Hansen
Abstract: The invention relates to a method of a fingerprint sensing system of extracting fingerprint feature data from an image captured by a fingerprint sensor of the fingerprint sensing system, and a fingerprint sensing system performing the method.
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公开(公告)号：US11062113B2
公开(公告)日：2021-07-13
申请号：US16605550
申请日：2018-04-19
Applicant: FINGERPRINT CARDS AB
Inventor： Morten With Pedersen , Morten Hansen
Abstract: A fingerprint image is acquired, and it is determined if the finger is still touching the sensing surface. When the finger no longer touches the sensing surface, the user is authenticated based on one or several fingerprint image(s) acquired so far. When the finger still touches the sensing surface, a quality measure is determined for the fingerprint image. When a quality of the fingerprint image fulfills a predefined quality criterion, the user is authenticated based on one or several fingerprint images acquired so far. When the quality of the fingerprint image fails to fulfill the predefined quality criterion, a subsequent fingerprint image is acquired. When the finger still touches the sensing surface, and the quality measure indicates that the quality of the subsequent fingerprint image fulfills the predefined quality criterion, the user is authenticated based on one or several fingerprint images acquired so far including the subsequent fingerprint image.
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公开(公告)号：US20170032165A1
公开(公告)日：2017-02-02
申请号：US15188473
申请日：2016-06-21
Applicant: Fingerprint Cards AB
Inventor： Morten Hansen , Fredrik Ramberg , Hans Thörnblom
IPC: G06K9/00
CPC classification number: G06K9/0002 , G06K9/00067
Abstract: An apparatus and a computer-implemented method of acquiring a fingerprint image from a fingerprint sensor with an array of sensor elements spanning a sensing area, comprising: monitoring groups of sensor elements located at group-wise spaced apart positions in the array of sensor elements, to determine a touch event occurring on the array of sensor elements; from the array of sensor elements, acquiring, at respective points in time, fingerprint sub-images which are confined in size to a subarea of the sensing area; as the fingerprint sub-images are acquired, computing values of a statistical indicator for the fingerprint sub-images; and acquiring a full fingerprint image when a predefined criterion indicates that the values of the statistical indicator has reached or is about to reach a stable state.
Abstract translation: 一种从具有跨越感测区域的传感器元件的阵列的指纹传感器获取指纹图像的装置和计算机实现的方法，包括：监测位于所述传感器元件阵列中的分组位置的传感器元件的组， 以确定在传感器元件阵列上发生的触摸事件; 从传感器元件的阵列，在各个时间点获取被限制在感测区域的子区域上的指纹子图像; 作为获取指纹子图像，计算指纹子图像的统计指标值; 并且当预定标准指示统计指示符的值已经达到或将要达到稳定状态时获取完整的指纹图像。
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公开(公告)号：US11232274B2
公开(公告)日：2022-01-25
申请号：US16491668
申请日：2018-03-05
Applicant: Fingerprint Cards AB
Inventor： Morten Hansen , Michael Sass Hansen , Arne Husth
Abstract: The invention relates to a method of a fingerprint sensing system of enabling suppressing impairment data present in an image captured by a fingerprint sensor of the fingerprint sensing system, and a fingerprint sensing system performing the method.
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