WO2004061757A1 - Procede de determination du caractere vivant d'un element porteur d'une empreinte digitale - Google Patents
Procede de determination du caractere vivant d'un element porteur d'une empreinte digitale Download PDFInfo
- Publication number
- WO2004061757A1 WO2004061757A1 PCT/FR2003/003803 FR0303803W WO2004061757A1 WO 2004061757 A1 WO2004061757 A1 WO 2004061757A1 FR 0303803 W FR0303803 W FR 0303803W WO 2004061757 A1 WO2004061757 A1 WO 2004061757A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electrodes
- impedance
- fingerprint
- measurement
- zcd
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
Definitions
- the present invention relates to a method for verifying the living character of a finger by a fingerprint sensor.
- the invention also relates to the fingerprint sensor allowing the implementation of this method.
- any protected access becomes accessible to my authorized person by a means that only they have.
- One of the ways to limit access to a person is to require that person's fingerprint.
- the image of a person's fingerprint is obtained by a fingerprint sensor. Once the image of the imprint obtained by the sensor, it is transmitted to an image processing unit which compares the image obtained with a bank of image of imprints so as to verify that the imprint taken by the sensor is known. Recognition of the fingerprint by the image processing unit then gives the person to whom the fingerprint corresponds access to what they are looking for.
- the object of the invention is therefore to propose a method for verifying the living character of a finger which ensures with certainty the discrimination between a living finger and an imitation.
- the invention relates to a method for determining the living character of an element carrying a fingerprint, consisting in carrying out impedance measurements at different points of said element using electrodes.
- the method consists in measuring the impedance between two first electrodes of predetermined surface, in measuring the impedance between two second electrodes of predetermined surface and in verifying that the points defined by the impedance values and of surface corresponding to the first and second electrodes belong to the same curve verifying said law of variation.
- the method consists firstly in carrying out a first impedance measurement between two first electrodes of predetermined surface and in determining the curve verifying said law of variation, then in a second step, to carry out a second impedance measurement between two second electrodes of predetermined surface and to verify that the point defined by the impedance and surface values corresponding to the second electrodes belongs to a tolerance zone finding around the predefined curve.
- said second impedance measurement is carried out randomly between two electrodes of the same size or between two electrodes of different sizes.
- said second impedance measurement is carried out alternately between two electrodes of the same size or between two electrodes of different sizes.
- the present invention also relates to a fingerprint sensor allowing the determination of the living character of an element carrying a fingerprint.
- the sensor according to the invention is characterized in that it comprises at least two pairs of electrodes of different surfaces.
- one of said pairs of electrodes consists of two small closely spaced electrodes provided to allow local measurement of the impedance.
- said sensor comprises a first set of four monoblock electrodes with identical surfaces and a second set of two electrodes in the form of interlocking combs with identical surfaces.
- said sensor comprises two sets of four monoblock electrodes and identical surfaces inside the same set.
- said sensor comprises a first set of four monoblock electrodes and identical surfaces, a second set of two monoblock electrodes and identical surfaces and a third set of two electrodes in the form of intersecting combs and surfaces identical.
- said sensor comprises an optical system provided for producing an image of the fingerprint and for determining the surface of the measurement electrodes not entirely covered by the fingerprint.
- Fig.2a shows a schematic top view of a fingerprint sensor whose electrodes are completely covered by a fingerprint
- Fig.2b shows a schematic top view of a fingerprint sensor whose electrodes are partially covered by a fingerprint
- Fig. 3 represents a law of variation of the impedance measured between two electrodes as a function of the surface of these electrodes
- Fig. 4 shows a first embodiment with four electrodes of a fingerprint sensor according to the invention
- Fig. 5 shows a second embodiment with six electrodes of a fingerprint sensor according to the invention.
- Figs. 6 and 7 show a third and a fourth embodiment with eight electrodes of a fingerprint sensor according to the invention.
- the invention relates to a method for verifying the living character of an element carrying a fingerprint by measuring the impedance Z thereof.
- impedance measurement is understood to mean both the measurement of impedance Z in itself and measurements of the type measuring resistance, capacitance, inductance, etc.
- the measurement of the impedance Z is carried out, as shown in FIG. 1, by a fingerprint sensor 1 placed in contact with the element carrying the fingerprint, here represented by a finger D.
- the fingerprint sensor 1 comprises a plate 10 of transparent material, for example glass or transparent plastic, making it optically possible to take the fingerprint D.
- a plate 10 of transparent material for example glass or transparent plastic, making it optically possible to take the fingerprint D.
- Ej is made possible by conductive and transparent connections. These connections 20 also placed in contact with the plate 10 must necessarily be conductive and transparent so as to allow the sensor 1 to ensure both its image sensor function and its function of verifying the living character of the finger.
- the transparency of the connections 20 is preferably obtained by deposition under vacuum of a very thin layer of material, preferably ITO (Indium tin Oxide), of thickness less than one micrometer.
- ITO Indium tin Oxide
- Figs. 2a and 2b there is shown a top view of a fingerprint sensor 1 according to the invention.
- the sensor 2 comprises two electrodes Ea, Eb, of small area and two electrodes Ec, Ed of larger area. These four electrodes are provided to enable the impedance Z of finger D to be measured two by two, which covers them with its imprint 4.
- the impedance Zab is measured between the two smallest electrodes Ea and Eb, then the impedance Zcd between the two largest electrodes Ec and Ed.
- the surface S of the electrodes covered by the imprint 4 is different.
- the surface Sij considered preferably corresponds to the smaller surface of the two surfaces of the electrodes Ei and Ej covered by the fingerprint 4 of the finger D.
- the surface Scd considered will advantageously correspond to the surface of one of the electrodes Ec or Ed. If as shown in FIG. 2b the imprint 4 does not entirely cover the electrodes Ec and Ed, the surface Scd considered will then advantageously correspond to the smallest of the areas Ac or Ad covered by the imprint 4 of the finger D.
- a second step we check that the impedance Z is constant over the whole of the finger D. For this, we measure the impedance Zcd between the two large electrodes Ec and Ed. Again knowing the surface Scd of the large electrodes Ec and Ed, we are able to place a point Pcd on the graph of FIG. 3. If the point Pcd obtained by this second measurement is located in a tolerance zone T surrounding the curve C, we will consider that the law is verified for this second point Pcd and therefore that the finger is alive.
- the implementation of the method involves the use of a fingerprint sensor 1.
- a fingerprint sensor 1 Several embodiments of the sensor 1 according to the invention are proposed. These different embodiments are shown in Figs. 4, 5, 6 and 7.
- FIG. 4 there is shown a first embodiment of the fingerprint sensor according to the invention.
- the sensor 1 comprises two small electrodes Ea, Eb and two large electrodes Ec, Ed, ie two sets of two electrodes with identical surfaces inside the same set.
- Each of the electrodes is connected by a connection 20 preferably made of ITO (Indium Tin Oxide) to a device for measuring the impedance Z.
- ITO Indium Tin Oxide
- An essential characteristic of the invention verified for all the embodiments of the sensor is the random nature of the impedance measurements.
- randomness is meant the possibility of carrying out impedance measurements both between two small electrodes and between a small electrode and a large electrode and of being able to invert the electrodes serving for the measurement of the impedance so as to foil d '' possible forgers who would have understood the operation of the sensor.
- a third impedance measurement can therefore be carried out, for example alternately for every other finger, between the electrodes Ec and Ea and then between the electrodes Ed and Eb. This third measurement confirms the second measurement.
- FIG. 5 a second embodiment of a fingerprint sensor according to the invention comprising six measurement electrodes.
- these six electrodes there are four large electrodes Ec, Ed, Ee and Ef and two small electrodes Ea and Eb, i.e. a first set of four monoblock electrodes with identical surfaces and a second set of two electrodes in the form of interlocking combs of identical surfaces.
- the two small electrodes each consist of two parts of electrodes electrically connected by a cord of conductive material advantageously made of ITO.
- the two parts of the same electrode are separated by a part of the other electrode so as to measure a very localized and precise impedance.
- the impedance measurements are carried out as follows.
- the impedance Zab is measured between the small electrodes Ea, Eb and a second and third impedances are measured, ie between two of the large electrodes, for example between the electrodes Ec and Ee (Zce) then Ef and Ed (Zfd), if these electrodes are covered by the finger D, or in the opposite case, between a large electrode and a small electrode, for example between Ec and Ea (Zac) and between Ee and Eb (Zeb).
- the sensor 1 comprises two sets of four monoblock electrodes and identical surfaces inside the same set, while in the fourth embodiment embodiment, the sensor 1 comprises a first set of four monoblock electrodes and identical surfaces, a second set of two monoblock electrodes and identical surfaces and a third set of two electrodes in the form of intersecting combs and identical surfaces.
- the impedance Z measurements for both of the embodiments are carried out identically.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003299353A AU2003299353A1 (en) | 2002-12-20 | 2003-12-19 | Method of determining the living character of an element bearing a fingerprint |
EP03799635A EP1573655A1 (fr) | 2002-12-20 | 2003-12-19 | Procede de determination du caractere vivant d'un element porteur d'une empreinte digitale |
US10/539,822 US7567690B2 (en) | 2002-12-20 | 2003-12-19 | Method of determining the living character of an element carrying a fingerprint |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR02/16735 | 2002-12-20 | ||
FR0216735A FR2849244B1 (fr) | 2002-12-20 | 2002-12-20 | Procede de determination du caractere vivant d'un element porteur d'une empreinte digitale |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004061757A1 true WO2004061757A1 (fr) | 2004-07-22 |
Family
ID=32406533
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2003/003803 WO2004061757A1 (fr) | 2002-12-20 | 2003-12-19 | Procede de determination du caractere vivant d'un element porteur d'une empreinte digitale |
Country Status (6)
Country | Link |
---|---|
US (1) | US7567690B2 (fr) |
EP (1) | EP1573655A1 (fr) |
CN (1) | CN100363937C (fr) |
AU (1) | AU2003299353A1 (fr) |
FR (1) | FR2849244B1 (fr) |
WO (1) | WO2004061757A1 (fr) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2897966B1 (fr) | 2006-02-24 | 2008-05-16 | Sagem Defense Securite | Biodetecteur sans contact |
FR2907940B1 (fr) | 2006-10-25 | 2009-05-01 | Sagem Defense Securite | Procede de validation de capture d'empreinte corporelle, notamment d'une empreinte digitale |
WO2010051041A1 (fr) * | 2008-11-03 | 2010-05-06 | Cross Match Technologies, Inc. | Appareil et procédé d'identification de fausses empreintes digitales |
WO2012158950A1 (fr) | 2011-05-17 | 2012-11-22 | Cross Match Technologies, Inc. | Capteurs d'empreinte digitale |
WO2013071311A1 (fr) | 2011-11-11 | 2013-05-16 | Cross Match Technologies, Inc. | Rejet de la lumière ambiante pour capteurs à contact non imageurs |
EP2776977B1 (fr) | 2011-11-12 | 2020-04-22 | Cross Match Technologies, Inc. | Éclairage par lumière ambiante pour capteurs à contact non imageurs |
NO340311B1 (no) * | 2013-02-22 | 2017-03-27 | Idex Asa | Integrert fingeravtrykksensor |
US9442599B2 (en) * | 2013-07-25 | 2016-09-13 | Atmel Corporation | System and method for using signals resulting from signal transmission in a touch sensor |
CN114639126A (zh) | 2014-02-25 | 2022-06-17 | Hid环球公司 | 生物计量传感器 |
FR3047588B1 (fr) | 2016-02-09 | 2019-04-12 | Morpho | Procede de traitement biometrique d'images |
WO2018081932A1 (fr) * | 2016-11-01 | 2018-05-11 | 深圳信炜科技有限公司 | Dispositif électronique |
RU2637468C1 (ru) * | 2016-12-26 | 2017-12-04 | Самсунг Электроникс Ко., Лтд. | Способ распознавания живой ткани и соответствующее устройство (варианты) |
US11531756B1 (en) | 2017-03-20 | 2022-12-20 | Hid Global Corporation | Apparatus for directing presentation attack detection in biometric scanners |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997014111A1 (fr) * | 1995-10-06 | 1997-04-17 | Kallo Peter | Detecteur pour la reconnaissance du caractere vivant d'un doigt, destine a un appareil de reconnaissance d'empreintes digitales |
US6314195B1 (en) * | 1997-04-18 | 2001-11-06 | Nec Corporation | Organism identifying method and device |
EP1187056A2 (fr) * | 2000-08-28 | 2002-03-13 | STMicroelectronics, Inc. | Détection capacitive d'un doigt dans un capteur des empreintes digitales |
EP1187057A2 (fr) * | 2000-08-28 | 2002-03-13 | STMicroelectronics, Inc. | Détection résistive d'un doigt dans un capteur des empreintes digitales |
WO2002099731A1 (fr) * | 2001-06-01 | 2002-12-12 | Infineon Technologies Ag | Capteur biometrique |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW241352B (en) * | 1994-03-30 | 1995-02-21 | Whitaker Corp | Reflective mode ultrasonic touch sensitive switch |
TW303441B (fr) * | 1995-03-29 | 1997-04-21 | Trw Inc | |
US5987172A (en) * | 1995-12-06 | 1999-11-16 | Cognex Corp. | Edge peak contour tracker |
US6067368A (en) * | 1996-01-26 | 2000-05-23 | Authentec, Inc. | Fingerprint sensor having filtering and power conserving features and related methods |
US5963679A (en) * | 1996-01-26 | 1999-10-05 | Harris Corporation | Electric field fingerprint sensor apparatus and related methods |
US5920640A (en) * | 1997-05-16 | 1999-07-06 | Harris Corporation | Fingerprint sensor and token reader and associated methods |
US5953441A (en) * | 1997-05-16 | 1999-09-14 | Harris Corporation | Fingerprint sensor having spoof reduction features and related methods |
US6259804B1 (en) * | 1997-05-16 | 2001-07-10 | Authentic, Inc. | Fingerprint sensor with gain control features and associated methods |
US5864296A (en) * | 1997-05-19 | 1999-01-26 | Trw Inc. | Fingerprint detector using ridge resistance sensor |
US6310683B1 (en) * | 1997-08-05 | 2001-10-30 | Casio Computer Co., Ltd. | Apparatus for reading fingerprint |
SE511543C2 (sv) * | 1998-02-16 | 1999-10-18 | Fingerprint Cards Ab | Anordning och metod för kapacitiv avkänning av topologiska variationer |
EP0969477B1 (fr) * | 1998-07-02 | 2006-09-27 | Nippon Telegraph and Telephone Corporation | Dispositif de détection pour petites variations de capacités |
JP2000172833A (ja) * | 1998-12-10 | 2000-06-23 | Omron Corp | 指紋照合装置 |
US6333989B1 (en) * | 1999-03-29 | 2001-12-25 | Dew Engineering And Development Limited | Contact imaging device |
US6282304B1 (en) * | 1999-05-14 | 2001-08-28 | Biolink Technologies International, Inc. | Biometric system for biometric input, comparison, authentication and access control and method therefor |
CA2293118A1 (fr) * | 1999-12-24 | 2001-06-24 | Francis Picard | Reconnaisseur d'empreintes digitales bolometrique |
US6292576B1 (en) * | 2000-02-29 | 2001-09-18 | Digital Persona, Inc. | Method and apparatus for distinguishing a human finger from a reproduction of a fingerprint |
US6898301B2 (en) * | 2000-07-10 | 2005-05-24 | Casio Computer Co., Ltd. | Authentication system based on fingerprint and electronic device employed for the system |
US6956608B1 (en) * | 2000-08-11 | 2005-10-18 | Identix Incorporated | Fingerprint imaging device including an optical plate having microreflectors |
JP2002259954A (ja) * | 2001-02-28 | 2002-09-13 | Nec Corp | 指紋認証の結果表示装置、及び、その結果表示方法 |
JP2003111749A (ja) * | 2001-10-09 | 2003-04-15 | Bmf:Kk | ヒューマン判定装置 |
-
2002
- 2002-12-20 FR FR0216735A patent/FR2849244B1/fr not_active Expired - Lifetime
-
2003
- 2003-12-19 WO PCT/FR2003/003803 patent/WO2004061757A1/fr not_active Application Discontinuation
- 2003-12-19 AU AU2003299353A patent/AU2003299353A1/en not_active Abandoned
- 2003-12-19 EP EP03799635A patent/EP1573655A1/fr not_active Ceased
- 2003-12-19 US US10/539,822 patent/US7567690B2/en active Active
- 2003-12-19 CN CNB200380107149XA patent/CN100363937C/zh not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997014111A1 (fr) * | 1995-10-06 | 1997-04-17 | Kallo Peter | Detecteur pour la reconnaissance du caractere vivant d'un doigt, destine a un appareil de reconnaissance d'empreintes digitales |
US6314195B1 (en) * | 1997-04-18 | 2001-11-06 | Nec Corporation | Organism identifying method and device |
EP1187056A2 (fr) * | 2000-08-28 | 2002-03-13 | STMicroelectronics, Inc. | Détection capacitive d'un doigt dans un capteur des empreintes digitales |
EP1187057A2 (fr) * | 2000-08-28 | 2002-03-13 | STMicroelectronics, Inc. | Détection résistive d'un doigt dans un capteur des empreintes digitales |
WO2002099731A1 (fr) * | 2001-06-01 | 2002-12-12 | Infineon Technologies Ag | Capteur biometrique |
Non-Patent Citations (2)
Title |
---|
See also references of EP1573655A1 * |
TARTAGNI M ET AL: "A 390 dpi live fingerprint imager based on feedback capacitive sensing scheme", SOLID-STATE CIRCUITS CONFERENCE, 1997. DIGEST OF TECHNICAL PAPERS. 43RD ISSCC., 1997 IEEE INTERNATIONAL SAN FRANCISCO, CA, USA 6-8 FEB. 1997, NEW YORK, NY, USA,IEEE, US, 6 February 1997 (1997-02-06), pages 200 - 201,456, XP010218978, ISBN: 0-7803-3721-2 * |
Also Published As
Publication number | Publication date |
---|---|
CN1729472A (zh) | 2006-02-01 |
US20060140456A1 (en) | 2006-06-29 |
FR2849244A1 (fr) | 2004-06-25 |
FR2849244B1 (fr) | 2006-03-10 |
AU2003299353A1 (en) | 2004-07-29 |
EP1573655A1 (fr) | 2005-09-14 |
US7567690B2 (en) | 2009-07-28 |
CN100363937C (zh) | 2008-01-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2206825C (fr) | Systeme de lecture d'empreintes digitales | |
WO2004061757A1 (fr) | Procede de determination du caractere vivant d'un element porteur d'une empreinte digitale | |
EP2118816B1 (fr) | Dispositif de capture biometrique securise | |
WO2004068394A1 (fr) | Procede et dispositif de reconnaissance de personne | |
EP0840250A1 (fr) | Système de lecture d'empreintes digitales avec résistances de chauffage intégrées | |
EP3388975A1 (fr) | Dispositif de capture d'une empreinte d'une partie corporelle | |
FR2739977A1 (fr) | Capteur monolithique d'empreintes digitales | |
EP3388976B1 (fr) | Procede de detection de fraude | |
WO2004061758A1 (fr) | Procede de determination du caractere vivant d’un element porteur d’une empreinte digitale | |
FR2912531A1 (fr) | Methode de biometrie reposant sur une image thermique d'un doigt | |
FR2674051A1 (fr) | Dispositif d'identification d'une personne, notamment par detection d'empreinte digitale. | |
WO2017162931A1 (fr) | Procédé permettant de gérer les validations des messages relatifs à une chaîne de messages de façon unitaire à travers un réseau de validation décentralisé | |
EP3723003B1 (fr) | Carte à puce comportant un capteur d'empreintes digitales | |
FR2736179A1 (fr) | Systeme d'authentification fonde sur la reconnaissance d'empreintes digitales | |
FR3069354A1 (fr) | Capteur thermique avec deux portions pyroelectriques superposees, pour la mesure d'un differentiel de charges | |
EP2901369B1 (fr) | Dispositif de capture d'une image représentative d'une empreinte d'une partie du corps d'une personne | |
EP3828763A1 (fr) | Capteur d'empreinte à détection d'impédance | |
CA2318360C (fr) | Dispositif de prise d'empreintes digitales | |
WO2018114902A1 (fr) | Dispositif d'acquisition d'empreintes digitales | |
EP4012609A1 (fr) | Détecteur de dermatoglyphes | |
EP4275597A1 (fr) | Capteur non invasif et procede de mesure | |
FR2787988A1 (fr) | Dispositif de prise d'empreintes | |
FR3091378A1 (fr) | Dispositif de reconnaissance biometrique d’une personne | |
FR3049092A1 (fr) | Dispositif d'authentification biometrique et de fiabilisation des identifications biometriques par photographie en lumiere visible et infrarouge, spectrometrie et analyses differentielles | |
FR2986630A1 (fr) | Dispositif d'authentification d'utilisateur |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SC SD SE SG SK SL TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2003799635 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 20038A7149X Country of ref document: CN |
|
WWP | Wipo information: published in national office |
Ref document number: 2003799635 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2006140456 Country of ref document: US Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 10539822 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 10539822 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: JP |
|
WWW | Wipo information: withdrawn in national office |
Country of ref document: JP |