Patents by Inventor David TINGDAHL
David TINGDAHL has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11288480Abstract: 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.Type: GrantFiled: March 26, 2020Date of Patent: March 29, 2022Assignee: FINGERPRINT CARDS ANACATUM IP ABInventors: Kenneth Jonsson, David Tingdahl
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Publication number: 20200226340Abstract: 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.Type: ApplicationFiled: March 26, 2020Publication date: July 16, 2020Applicant: Fingerprint Cards ABInventors: Kenneth JONSSON, David TINGDAHL
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Patent number: 10607055Abstract: 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.Type: GrantFiled: December 14, 2017Date of Patent: March 31, 2020Assignee: Fingerprint Cards ABInventors: Kenneth Jonsson, David Tingdahl
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Publication number: 20180225495Abstract: 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.Type: ApplicationFiled: December 14, 2017Publication date: August 9, 2018Applicant: Fingerprint Cards ABInventors: Kenneth JONSSON, David TINGDAHL
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Patent number: 10037454Abstract: 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.Type: GrantFiled: August 29, 2017Date of Patent: July 31, 2018Assignee: FINGERPRINT CARDS ABInventors: Kenneth Jonsson, David Tingdahl
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Publication number: 20180173920Abstract: 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.Type: ApplicationFiled: August 29, 2017Publication date: June 21, 2018Inventors: Kenneth Jonsson, David Tingdahl
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Patent number: 9672409Abstract: 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.Type: GrantFiled: June 22, 2016Date of Patent: June 6, 2017Assignee: FINGERPRINT CARDS ABInventors: Kenneth Jonsson, Eric Setterberg, David Tingdahl
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Publication number: 20170004352Abstract: 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.Type: ApplicationFiled: June 22, 2016Publication date: January 5, 2017Applicant: Fingerprint Cards ABInventors: Kenneth Jonsson, Eric Setterberg, David Tingdahl
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Patent number: 9514352Abstract: 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.Type: GrantFiled: August 24, 2015Date of Patent: December 6, 2016Assignee: Eaton CorporationInventors: Eric Setterberg, Hamid Sarvé, David Tingdahl
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Patent number: 9477872Abstract: 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.Type: GrantFiled: November 25, 2015Date of Patent: October 25, 2016Assignee: FINGERPRINT CARDS ABInventors: Hamid Sarve, David Tingdahl, Carsten Juncker, Niels Mørch
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Publication number: 20160180141Abstract: 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.Type: ApplicationFiled: November 25, 2015Publication date: June 23, 2016Applicant: FINGERPRINT CARDS ABInventors: Hamid SARVE, David TINGDAHL, Carsten JUNCKER, Niels MØRCH
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Publication number: 20160180145Abstract: 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.Type: ApplicationFiled: August 24, 2015Publication date: June 23, 2016Applicant: FINGERPRINT CARDS ABInventors: Eric Setterberg, Hamid Sarvé, David Tingdahl