Patent Document ID: 20160260225
Application ID: 15041656
Patent Status: 0

Claim One:
1. A method of estimating a finger movement of a finger using a fingerprint sensor, said method comprising the steps of: a) acquiring a reference fingerprint image at a reference fingerprint image acquisition time; b) acquiring at least one candidate fingerprint image at each candidate fingerprint image acquisition time in a time sequence of candidate fingerprint image acquisition times; c) determining, for each of said candidate fingerprint image acquisition times, a match parameter value for each of a plurality of candidate finger movement directions, said match parameter value being indicative of a correlation between a reference fingerprint image portion corresponding to a reference area of said fingerprint sensor and a candidate fingerprint image portion corresponding to a candidate area of said fingerprint sensor, said candidate area being displaced a given displacement distance in said candidate finger movement direction in relation to said reference area, said given displacement distance in said candidate finger movement direction being the same for each of said candidate fingerprint image acquisition times; d) determining, for each of said candidate finger movement directions, a local extremum match parameter value indicating a maximum correlation for said time sequence of candidate fingerprint image acquisition times; and e) estimating said finger movement based on an evaluation of said determined local extremum match parameters.