US 11,721,126 B2
Method to authenticate a user in an electronic device comprising a fingerprint sensor
Henricus Derckx, St Asaph (GB); Wilhelmus Van Lier, St Asaph (GB); Michael A. Cowin, St Asaph (GB); and Davide Maltoni, Bertinoro FC (IT)
Assigned to TOUCH BIOMETRIX LIMITED, St. Asaph (GB)
Appl. No. 17/629,104
Filed by TOUCH BIOMETRIX LIMITED, Wales (GB)
PCT Filed Jul. 23, 2020, PCT No. PCT/GB2020/051773
§ 371(c)(1), (2) Date Jan. 21, 2022,
PCT Pub. No. WO2021/014162, PCT Pub. Date Jan. 28, 2021.
Claims priority of application No. 1910543 (GB), filed on Jul. 23, 2019; application No. 19188208 (EP), filed on Jul. 24, 2019; and application No. 1913890 (GB), filed on Sep. 26, 2019.
Prior Publication US 2022/0277583 A1, Sep. 1, 2022
Int. Cl. G06V 40/12 (2022.01); G06V 10/74 (2022.01); G06V 40/13 (2022.01); G06V 40/50 (2022.01); G06F 21/32 (2013.01)
CPC G06V 40/1371 (2022.01) [G06F 21/32 (2013.01); G06V 10/761 (2022.01); G06V 40/13 (2022.01); G06V 40/1353 (2022.01); G06V 40/50 (2022.01)] 12 Claims
OG exemplary drawing
 
1. A method of authenticating a user using an electronic device comprising a fingerprint sensor, the method comprising:
an enrolment process comprising:
obtaining first fingerprint data of a first hand using the fingerprint sensor;
determining, and storing, features of first fingerprints of respective fingers of the first hand; and
determining, and storing, for each one of the possible pairs of first fingerprints, an indication of plausible displacement between the two first fingerprints on the fingerprint sensor;
a comparison process comprising:
obtaining second fingerprint data of a subsequent hand using the fingerprint sensor;
determining features of second fingerprints of respective fingers of the subsequent hand;
determining a degree of similarity between each one of the first fingerprints and each one of the second fingerprints based on a comparison of the respective features;
identifying pairs of fingerprints, each pair comprising one of the first fingerprints and the second fingerprint which has the highest degree of similarity to said one of the first fingerprints; and
determining a plausibility of the displacement of each pair relative to each of the other pairs based on the stored indications of plausible displacement between the possible pairs of first fingerprints; and
controlling authentication of the user based on the determined plausibility of the displacement of each pair of fingerprints.