公开(公告)号：US09471765B1

公开(公告)日：2016-10-18

申请号：US15066219

申请日：2016-03-10

Applicant: Fingerprint Cards AB

Inventor： Eric Setterberg ,  Morten Jensen ,  Markus Andersson

IPC: G06K9/62 ,  G06K9/54 ,  G05B19/00 ,  G06F21/32 ,  G06K9/00 ,  G06F17/30

CPC classification number: G06K9/00026 ,  G06K9/00087 ,  G06K9/00926 ,  G06K9/6255

Abstract: A method of authenticating a finger against a stored template and expanding the stored template. The method comprises acquiring a present fingerprint image; retrieving a stored enrollment representation, comprising said stored template, and a representation of at least a first previous fingerprint image acquired in connection with a previous failed authentication attempt; and determining if the stored template should be expanded. When it is determined that a first match between a present fingerprint image representation and the stored template fulfills a first template updating requirement and a second match between the present fingerprint image representation and said at least first previous fingerprint image representation fulfills said second template updating requirement, a signal indicating a successful authentication is provided; and a first expanded template is formed based on said stored template, said present fingerprint image and said at least first previous fingerprint image.

Abstract translation: 一种针对存储的模板认证手指并扩展存储的模板的方法。 该方法包括获取当前指纹图像; 检索存储的登记表示，包括所述存储的模板，以及与先前失败的认证尝试相关联地获取的至少第一先前指纹图像的表示; 并确定是否应扩展存储的模板。 当确定当前指纹图像表示与所存储的模板之间的第一匹配满足第一模板更新要求，并且当前指纹图像表示与所述至少第一先前指纹图像表示之间的第二匹配满足所述第二模板更新要求时， 提供表示成​​功认证的信号; 并且基于所述存储的模板，所述当前指纹图像和所述至少第一先前指纹图像形成第一扩展模板。

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

IPC: G06K9/00 ,  G06K9/03

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.