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1. (WO2019050453) METHOD AND FINGERPRINT SENSING SYSTEM FOR DETERMINING FINGER CONTACT WITH A FINGERPRINT SENSOR
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Pub. No.: WO/2019/050453 International Application No.: PCT/SE2018/050881
Publication Date: 14.03.2019 International Filing Date: 03.09.2018
IPC:
G06K 9/00 (2006.01) ,G06K 9/03 (2006.01)
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
K
RECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
9
Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
K
RECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
9
Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
03
Detection or correction of errors, e.g. by rescanning the pattern
Applicants:
FINGERPRINT CARDS AB [SE/SE]; Box 2412 403 16 Göteborg, SE
Inventors:
BJERRE, Troels; DK
Agent:
KRANSELL & WENNBORG KB; P.O. Box 2096 403 12 GÖTEBORG, SE
Priority Data:
1751085-007.09.2017SE
Title (EN) METHOD AND FINGERPRINT SENSING SYSTEM FOR DETERMINING FINGER CONTACT WITH A FINGERPRINT SENSOR
(FR) PROCÉDÉ ET SYSTÈME DE DÉTECTION D'EMPREINTE DIGITALE POUR DÉTERMINER UN CONTACT DE DOIGT AVEC UN CAPTEUR D'EMPREINTE DIGITALE
Abstract:
(EN) The present disclosure relates to a method of determining that a finger is in stable contact with a surface covering a sensor area of a fingerprint sensor. The method comprises, by means of the fingerprint sensor, acquiring a time- sequence of images of the fingerprint of the received finger. The method also comprises, for each image of the time-sequence, dividing an image area (41) of the image, corresponding to the sensor area of the fingerprint sensor, into a plurality of image regions (r), said regions partly overlapping each other and covering the whole image area. The method also comprises, based on image analysis of each of the plurality of image regions of each image of the time-sequence, determining that the finger is in stable contact with the surface covering the sensor area.
(FR) La présente invention concerne un procédé permettant de déterminer qu'un doigt est en contact stable avec une surface recouvrant une zone de capteur d'un capteur d'empreinte digitale. Le procédé comprend, au moyen du capteur d'empreintes digitales, l'acquisition d'une séquence temporelle d'images de l'empreinte digitale du doigt reçu. Le procédé comprend également, pour chaque image de la séquence temporelle, la division d'une zone d'image (41) de l'image, correspondant à la zone de détection du capteur d'empreinte digitale, en une pluralité de régions d'image (r), lesdites régions se chevauchant partiellement et recouvrant la totalité de la zone d'image. Le procédé comprend également, sur la base d'une analyse d'image de chacune de la pluralité de régions d'image de chaque image de la séquence temporelle, la détermination que le doigt est en contact stable avec la surface recouvrant la zone de capteur.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)