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1. (WO2018160120) METHOD OF CLASSIFYING A FINGER TOUCH IN RESPECT OF FINGER PRESSURE AND FINGERPRINT SENSING SYSTEM

Pub. No.:    WO/2018/160120    International Application No.:    PCT/SE2018/050178
Publication Date: Sat Sep 08 01:59:59 CEST 2018 International Filing Date: Tue Feb 27 00:59:59 CET 2018
IPC: G06F 3/041
G06K 9/00
Applicants: FINGERPRINT CARDS AB
Inventors: BJERRE, Troels
Title: METHOD OF CLASSIFYING A FINGER TOUCH IN RESPECT OF FINGER PRESSURE AND FINGERPRINT SENSING SYSTEM
Abstract:
A method of classifying a finger touch in respect of a finger pressure on a surface of a fingerprint sensor(3), comprising the steps of: receiving(100), on the surface of the fingerprint sensor, a finger having a fingerprint topography; acquiring(101)a first time-sequence of fingerprint images; determining(102)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(106)a second time-sequence of fingerprint images; determining (107)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(109)the finger touch based on a relation between the test value and the reference value.