公开(公告)号：US20160180145A1

公开(公告)日：2016-06-23

申请号：US14833809

申请日：2015-08-24

Applicant: FINGERPRINT CARDS AB

Inventor： Eric Setterberg ,  Hamid Sarvé ,  David Tingdahl

IPC: G06K9/00

CPC classification number: G06K9/00087 ,  G06F3/03547 ,  G06F21/32 ,  G06K9/00013 ,  G06K9/00026 ,  G06K9/00926

Abstract: The present invention relates to a method of enrolling a fingerprint of a user's finger, by means of an electronic device comprising a touch sensor having an active area corresponding to a first surface portion of the electronic device; and a fingerprint sensor having an active area corresponding to a second surface portion of the electronic device. The comprises the steps of acquiring a touch sensor signal indicative of a sub-area of the touch sensor being touched by the finger; acquiring a partial fingerprint image of a portion of the fingerprint; a positional relationship between the portion of the fingerprint and the finger based on the sub-area and a positional relationship between the first and second surface portions of the electronic device; and forming a fingerprint template based on acquired partial fingerprint images and the determined positional relationships.

Abstract translation: 本发明涉及一种通过包括触摸传感器的电子设备登记用户手指的方法，该触摸传感器具有对应于该电子设备的第一表面部分的有效区域; 以及具有对应于电子设备的第二表面部分的有效区域的指纹传感器。 包括以下步骤：获取指示由手指触摸的触摸传感器的子区域的触摸传感器信号; 获取指纹的一部分的部分指纹图像; 基于子区域的指纹部分和手指之间的位置关系以及电子设备的第一和第二表面部分之间的位置关系; 以及基于所获取的部分指纹图像和确定的位置关系形成指纹模板。

公开(公告)号：US09672409B2

公开(公告)日：2017-06-06

申请号：US15189055

申请日：2016-06-22

Applicant: Fingerprint Cards AB

Inventor： Kenneth Jonsson ,  Eric Setterberg ,  David Tingdahl

IPC: G06K9/00

CPC classification number: G06K9/00114 ,  G06K9/00013 ,  G06K9/0008 ,  G06K9/001 ,  G06K2009/00966

Abstract: A computer-implemented method of performing fingerprint based authentication from matching local features represented by binary features which can be matched in an efficient implementation in one or both of software and hardware by computing Hamming distances between the binary features. A local feature in a verification image is said to be matching with a local feature in an enrolment image if the Hamming distance between the binary features falls below a pre-determined threshold. The computer-implemented method retains information about the similarity of local features in the two images and utilities it in an efficient way with the objective of improving fingerprint recognition rates and enabling finger liveness detection. In an aspect a normalized feature similarity distribution is generated as part of the representation in recognition and liveness detection.

公开(公告)号：US11288480B2

公开(公告)日：2022-03-29

申请号：US16830871

申请日：2020-03-26

Applicant: Fingerprint Cards AB

Inventor： Kenneth Jonsson ,  David Tingdahl

IPC: G06K9/00

Abstract: The present invention generally relates to a method for authenticating a finger of a user of an electronic device comprising a fingerprint sensor for sensing a fingerprint pattern, the method comprising the steps of: acquiring a candidate fingerprint image; determining, based on the candidate fingerprint image, a humidity level indication indicative of the humidity level of the finger; performing an authentication pre-process based on the humidity level indication; performing a fingerprint authentication process based on the pre-process to authenticate the user.

公开(公告)号：US09477872B2

公开(公告)日：2016-10-25

申请号：US14952169

申请日：2015-11-25

Applicant: FINGERPRINT CARDS AB

Inventor： Hamid Sarve ,  David Tingdahl ,  Carsten Juncker ,  Niels Mørch

IPC: G06K9/00 ,  G06K9/03 ,  G06T7/00

CPC classification number: G06K9/00026 ,  G06K9/0008 ,  G06K9/001 ,  G06K9/036

Abstract: In a fingerprint sensing system, a determination is made of a center of attention, COA, point. The COA point is a point on a finger of a user that is likely to be in proximity of the center of a fingerprint image of the finger obtained by a fingerprint sensor. This COA determination is used in guiding the user in a fingerprint enrolment procedure.

Abstract translation: 在指纹感测系统中，确定了注意中心，COA，点。 COA点是用户手指上可能位于由指纹传感器获得的手指的指纹图像的中心附近的点。 这种COA确定用于在指纹注册过程中指导用户。

公开(公告)号：US10607055B2

公开(公告)日：2020-03-31

申请号：US15842164

申请日：2017-12-14

Applicant: Fingerprint Cards AB

Inventor： Kenneth Jonsson ,  David Tingdahl

IPC: G06K9/00

Abstract: The present invention generally relates to a method for authenticating a finger of a user of an electronic device comprising a fingerprint sensor for sensing a fingerprint pattern, the method comprising the steps of: acquiring a candidate fingerprint image; determining, based on the candidate fingerprint image, a humidity level indication indicative of the humidity level of the finger; performing an authentication pre-process based on the humidity level indication; performing a fingerprint authentication process based on the pre-process to authenticate the user.

公开(公告)号：US10037454B2

公开(公告)日：2018-07-31

申请号：US15689496

申请日：2017-08-29

Applicant: Fingerprint Cards AB

Inventor： Kenneth Jonsson ,  David Tingdahl

IPC: G06K9/00 ,  G06F21/32

CPC classification number: G06K9/0002 ,  G06F21/32 ,  G06K9/00013 ,  G06K9/00067 ,  G06K9/001 ,  G06K9/4671 ,  G06K9/6228

Abstract: The present invention generally relates to a method for forming a candidate fingerprint representation of a fingerprint of a finger of a user of an electronic device comprising a capacitive fingerprint sensor for sensing a fingerprint pattern, the method comprising acquiring a sequence of candidate fingerprint images each acquired at different imaging acquisition settings. Further, a fingerprint feature set is extracted from each of the candidate fingerprint images, the fingerprint features of each fingerprint set being extracted according to a first selection criterion. A feature representation set is determined for each of the fingerprint feature sets. A candidate fingerprint representation is formed from a combination of the fingerprint feature representation sets. The invention further relates to a fingerprint sensing system and an electronic device.

公开(公告)号：US20180173920A1

公开(公告)日：2018-06-21

申请号：US15689496

申请日：2017-08-29

Applicant: Fingerprint Cards AB

Inventor： Kenneth Jonsson ,  David Tingdahl

IPC: G06K9/00 ,  G06F21/32

CPC classification number: G06K9/0002 ,  G06F21/32 ,  G06K9/001

Abstract: The present invention generally relates to a method for forming a candidate fingerprint representation of a fingerprint of a finger of a user of an electronic device comprising a capacitive fingerprint sensor for sensing a fingerprint pattern, the method comprising acquiring a sequence of candidate fingerprint images each acquired at different imaging acquisition settings. Further, a fingerprint feature set is extracted from each of the candidate fingerprint images, the fingerprint features of each fingerprint set being extracted according to a first selection criterion. A feature representation set is determined for each of the fingerprint feature sets. A candidate fingerprint representation is formed from a combination of the fingerprint feature representation sets. The invention further relates to a fingerprint sensing system and an electronic device.

公开(公告)号：US20170004352A1

公开(公告)日：2017-01-05

申请号：US15189055

申请日：2016-06-22

Applicant: Fingerprint Cards AB

Inventor： Kenneth Jonsson ,  Eric Setterberg ,  David Tingdahl

IPC: G06K9/00

CPC classification number: G06K9/00114 ,  G06K9/00013 ,  G06K9/0008 ,  G06K9/001 ,  G06K2009/00966

Abstract: A computer-implemented method of performing fingerprint based authentication from matching local features represented by binary features which can be matched in an efficient implementation in one or both of software and hardware by computing Hamming distances between the binary features. A local feature in a verification image is said to be matching with a local feature in an enrolment image if the Hamming distance between the binary features falls below a pre-determined threshold. The computer-implemented method retains information about the similarity of local features in the two images and utilities it in an efficient way with the objective of improving fingerprint recognition rates and enabling finger liveness detection. In an aspect a normalized feature similarity distribution is generated as part of the representation in recognition and liveness detection.

Abstract translation: 一种计算机实现的方法，其通过匹配由二进制特征表示的局部特征来执行基于指纹的认证，所述二进制特征可以通过计算二进制特征之间的汉明距离来在软件和硬件的一个或两个中的有效实施中匹配。 如果二进制特征之间的汉明距离低于预定阈值，则验证图像中的本地特征被称为与注册图像中的本地特征匹配。 计算机实现的方法保留关于两个图像中的局部特征的相似性的信息，并以有效的方式实现它，目的是改善指纹识别率并实现手指活动检测。 在一方面，归一化特征相似性分布被生成为识别和活性检测中的表示的一部分。

公开(公告)号：US09514352B2

公开(公告)日：2016-12-06

申请号：US14833809

申请日：2015-08-24

Applicant: FINGERPRINT CARDS AB

Inventor： Eric Setterberg ,  Hamid Sarvé ,  David Tingdahl

IPC: G06K9/00 ,  G06F3/041 ,  G06F21/32 ,  G06F3/0354

CPC classification number: G06K9/00087 ,  G06F3/03547 ,  G06F21/32 ,  G06K9/00013 ,  G06K9/00026 ,  G06K9/00926

Abstract: The present invention relates to a method of enrolling a fingerprint of a user's finger, by means of an electronic device comprising a touch sensor having an active area corresponding to a first surface portion of the electronic device; and a fingerprint sensor having an active area corresponding to a second surface portion of the electronic device. The comprises the steps of acquiring a touch sensor signal indicative of a sub-area of the touch sensor being touched by the finger; acquiring a partial fingerprint image of a portion of the fingerprint; a positional relationship between the portion of the fingerprint and the finger based on the sub-area and a positional relationship between the first and second surface portions of the electronic device; and forming a fingerprint template based on acquired partial fingerprint images and the determined positional relationships.

Abstract translation: 本发明涉及一种通过包括触摸传感器的电子设备登记用户手指的方法，该触摸传感器具有对应于该电子设备的第一表面部分的有效区域; 以及具有对应于电子设备的第二表面部分的有效区域的指纹传感器。 包括以下步骤：获取指示由手指触摸的触摸传感器的子区域的触摸传感器信号; 获取指纹的一部分的部分指纹图像; 基于子区域的指纹部分和手指之间的位置关系以及电子设备的第一和第二表面部分之间的位置关系; 以及基于所获取的部分指纹图像和确定的位置关系形成指纹模板。