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1. (WO2017018921) ACQUISITION OF A FINGERPRINT IMAGE

Pub. No.:    WO/2017/018921    International Application No.:    PCT/SE2016/050646
Publication Date: Fri Feb 03 00:59:59 CET 2017 International Filing Date: Wed Jun 29 01:59:59 CEST 2016
IPC: G06K 9/00
Applicants: FINGERPRINT CARDS AB
Inventors: ROLLE HANSEN, Morten
RAMBERG, Fredrik
THÖRNBLOM, Hans
Title: ACQUISITION OF A FINGERPRINT IMAGE
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.