WO2006008396A1 - Dispositif optique de capture biometrique par contact et installation mettant en oeuvre un tel dispositif - Google Patents
Dispositif optique de capture biometrique par contact et installation mettant en oeuvre un tel dispositif Download PDFInfo
- Publication number
- WO2006008396A1 WO2006008396A1 PCT/FR2005/001578 FR2005001578W WO2006008396A1 WO 2006008396 A1 WO2006008396 A1 WO 2006008396A1 FR 2005001578 W FR2005001578 W FR 2005001578W WO 2006008396 A1 WO2006008396 A1 WO 2006008396A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- optical element
- face
- layer
- image
- radiation
- 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
- G06V40/1382—Detecting the live character of the finger, i.e. distinguishing from a fake or cadaver finger
- G06V40/1388—Detecting the live character of the finger, i.e. distinguishing from a fake or cadaver finger using image processing
-
- 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
- G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
-
- 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
- G06V40/1382—Detecting the live character of the finger, i.e. distinguishing from a fake or cadaver finger
- G06V40/1394—Detecting the live character of the finger, i.e. distinguishing from a fake or cadaver finger using acquisition arrangements
Definitions
- the present invention relates generally to the field of biometric capture by contact, including fingerprint capture, and more specifically to improvements in optical biometric capture devices by contact, comprising: an optical element of which face -constitue at least part of an affixing surface of an organ which one wishes to capture a biometric characteristic, a radiation source associated with said optical element to illuminate said face of the optical element, and sensor means suitable for collecting radiation from said face of the optical element.
- the radiation source (generally in visible light) illuminates the organ (for example the finger): the parts of the organ in contact with the face scatter the radiation and the scattered radiation passes through an optical system to reach the sensitive surface of a sensor.
- the organ for example the finger
- This type of device works well when the face of apposition of the organ is clean.
- the latent image thus obtained can sufficiently reproduce a biometric characteristic (for example a fingerprint) of a person previously treated and this may result in an inadvertent command (erroneous detection of application of 'an organ, erroneous authorization, ).
- a biometric characteristic for example a fingerprint
- inadvertent command erroneous detection of application of 'an organ, erroneous authorization
- document US 2003/0202687 proposes forming several images of the organ which are then compared with each other. A difference detected between these images indicates a movement of the organ and suggests the presence of a real organ, while the strict identity of the images characterizing the absence of any movement suggests that these are latent images .
- a disadvantage of this known solution lies in the fact that, if an external radiation source is mobile or if the acquisition system of the biometric characteristics is itself mobile, the latent images can evolve over time and be treated as if a organ was in place against the face.
- WO 0184477 relates to a device having a source of controllable internal radiation. If one acquires images with radiation and without radiation, it becomes possible to discriminate the latent images and an organ to be treated.
- this known device has the disadvantage of being inefficient when the external source goes out when the internal source is off and, also, to malfunction when the external source is not constant. (eg sun seen through foliage, crossing place, moving sensor). - - ⁇
- the -document WO 9714111 teaches the use of electrodes for measuring changes in electrical properties at the surface of the optical element to detect the presence of an organ. Such a device, designed in practice to detect fraud, requires a specific analog electronic circuit; it is complex and expensive.
- the aim of the invention is to propose a simple technical solution which does not require any additional complex equipment, which is of low implementation cost and which can be applied both to new equipment in manufacture and to equipment already existing, to prevent an optical biometric capture device by being sensitive to latent images appearing under certain outdoor lighting conditions.
- the invention proposes a device as defined in the preamble, in particular, although not exclusively, for the capture of fingerprints, which, being arranged in accordance with the invention, is characterized in that said face of the optical element is coated with a thin layer defining a pattern and made of a material such, in relation to the material constituting the optical element, that said layer is substantially transparent in the presence of the radiation emitted by the radiation source when an element is affixed to said face of the optical element and to be substantially less transparent in the presence of an outer parasite-radiation inclined with respect to said face of the element optical.
- the optical biometric capture device is rendered relatively insensitive to latent image detection.
- ⁇ ⁇ ⁇ the formation of the thin layer applied to the face of the optical element.
- said layer is deposited directly on the face of the optical element or alternatively that it is formed on a continuous transparent film and that this film is deposited on the face of the optical element. optical element.
- the optical element may be a prism whose base constitutes the aforementioned face.
- the constituent material of the optical element can commonly be glass.
- the constituent material of the layer may be, in a simple manner to implement, an oxide called ITO (Indium-Tin Oxyd, Indium-tin oxide).
- the invention proposes a biometric capture installation by contact, comprising: at least one optical device for biometric capture by contact as explained above; storage means for memorizing the pattern formed by the thin layer;
- detection means for detecting in an image received by the sensor means, the presence of the image of said pattern superimposed on a fingerprint image
- discrimination means for rejecting, as a latent image, an image received by the sensor and formed of the superimposition of the image of the pattern and of a fingerprint image.
- FIG. 1A is a diagrammatic representation of a biometric capture optical device by contact targeted by the invention
- FIG. 1B is a fingerprint image detected by the sensor means of the device of FIG. 1A under normal operating conditions
- FIG. 2A is a schematic representation of the device of FIG. 1A under abnormal operating conditions
- FIG. 2B is a latent image that can be detected by the sensor means under the abnormal operating conditions shown in FIG. 2A;
- FIG. 3A is a schematic representation of the optical device of FIG. 1A arranged in accordance with the invention shown in the operating conditions of FIG. 2A;
- FIG. 3B is a schematic representation of the pattern affixed to the face of the optical element of FIG. 2A according to the invention;
- FIGS. 4 and 5 are representations of images perceived by the sensor means under various operating conditions of a device arranged in accordance with the invention;
- FIGS. 6A to 6C illustrate various variants of implementation of the provisions of the invention in FIG. 1-A-1 and FIG.
- FIG. 7 is a simplified block diagram of a biometric capture installation arranged according to the invention.
- FIG. 1A very schematically illustrates the main structure of a biometric contact capture optical device, which device is generally designated by the reference numeral 1.
- the device 1 as illustrated comprises an optical element 2 (constituted here by FIG. As an example in the form of a trapezoidal section prism) one face 3 (here the large face of the prism) is at least partly a surface apposition of an organ which is desired to capture a biometric characteristic.
- the device 1 is supposed to form an image of the fingerprints 5 of a finger 4 which is affixed to the face 3 of the prism.
- the device 1 further comprises a radiation source 6, generally a visible light source, which is associated with the optical element 2 so as to illuminate the aforementioned face 3.
- a radiation source 6 generally a visible light source, which is associated with the optical element 2 so as to illuminate the aforementioned face 3.
- the source of 6 irradiation illuminates the face 3 through the optical element 2, as shown in Figure IA.
- the radiation source 6 is located facing the small face of the prism opposite to the large face 3 and the radiation is directed substantially perpendicular to the face 3 so that the finger 4 is illuminated. front.
- the radiation is absorbed and reemitted by the projecting areas of the finger in any direction, including ⁇ en ⁇ direction -Sensor, -while in light of the fingerprint furrows or absence no radiation is perceived by the sensor.
- Part of the radiation scattered from the face 3 leaves the optical element by a side face 7 and is focused by focusing means 8 on the sensor means 9, and the latter then deliver electrical signals to a processing unit 10.
- the sensor means 9 receive an image
- the affixing of a finger on the face 3 can leave on it some greasy traces that have been. roughly shown at 12 on the prism 2 of Figure 2A. It may also occur that, in certain circumstances, the face 3 receives an outside radiation 13 (parasitic radiation) of a relative intensity (sun, halogen lamp, ...) which is inclined with respect to the face 3 and " directed approximately -transversalement to the inclined face 7 of output of the optical element 2.
- This parasitic ray ⁇ compassion highlights the greasy traces 12 and, because of its inclination, reaches the sensor means 9. If the traces fat 12 are important, the sensor means 9 then receive a fingerprint image as shown in FIG. 2B (false image or "latent" image) that, because of its relatively complete appearance and its sufficient contrasts, they treat like a real image obtained from a finger on the face 3.
- Figure 3B shows a portion of the face 3 thus equipped.
- the layer 14 is made of a material which is such, with respect to the ambient air and the constituent material of the optical element 2, that the layer 14 is substantially transparent in the presence of the radiation emitted by the radiation source 6 when a finger 4 is affixed to the face
- the material of the layer 14 has a coefficient of transmission of the radiation which differs slightly from that of the material of the optical element 2 (in practice he is slightly lower, that is to say ⁇ "the â ⁇ layer ⁇ "14 is slightly transparent depreciation that the optical element 2).
- the pattern formed by the layer 14 is invisible in the presence of radiation directed perpendicularly to the face 3 and, under the normal operating conditions of the device (illumination perpendi ⁇ cular to the face 3 and no stray radiation) the pattern formed by the layer 14 remains invisible for the sensor 9 which receives the only image of the finger of FIG. 1B.
- the pattern of the layer 14 becomes apparent in the presence of stray light.
- the image that can receive the sensor 9 in the case where no finger is affixed to the face 3 and where the face 3 is clean (no greasy traces) is similar to that shown in Figure 3B: the sensor receives only the image 17 of the pattern of the layer 14.
- the sensor 9 perceives the latent image 16 corresponding to these traces superimposed on image 17 of the pattern of the visible layer 14 to_trav: ers__cette. image_J.atente ⁇ as shown in Figure 5.
- Layer 14 may be made of any suitable material to produce the desired result. This layer may especially be made of ITO (Indium-Tin),
- Oxyd, indium-tin oxide commonly used in optics and which is likely to be deposited in very thin layer.
- the layer 14 may be deposited directly on the face 3 of the optical element 2, through a mask, to form the required pattern as shown in Figure 6A.
- the layer 14 is then discontinuous. It can also be envisaged, as illustrated in FIG. 6B, to form a continuous layer 14 of substantially constant thickness, having a transparency similar to that of the optical element 2 with the exception of localized locations 18 distributed and configured according to the predetermined pattern.
- FIG. 6B Another interesting solution is to form the predetermined pattern on a flying substrate affixable to the face 3.
- the layer 14 of Figure 6B could be constituted in this form; the selective deposition of the layer 14 envisaged in FIG. 6A could itself be formed on a continuous transparent film 19, itself applied on the surface as shown therein .
- Figure 6C Another interesting solution is to form the predetermined pattern on a flying substrate affixable to the face 3.
- the layer 14 of Figure 6B could be constituted in this form; the selective deposition of the layer 14 envisaged in FIG. 6A could itself be formed on a continuous transparent film 19, itself applied on the surface as shown therein .
- Figure 6C Another interesting solution is to form the predetermined pattern on a flying substrate affixable to the face 3.
- a very interesting advantage of the arrangements according to the invention lies in the fact that it is possible to equip new equipment, but also that it is possible to modify equipment already in operation --d-'- one-- way - relatively simple and inexpensive.
- Another advantage of the provisions of the invention lies in the fact that these arrangements are independent of the structure of the device (direct illumination or ombroscopy) and the production of the optical element (glass, synthetic material) subject to adaptation the index of the layer 14 as a function of that of the optical element 2.
- Yet another advantage of the provisions of the invention lies in the fact that they do not affect the structure of the capture device nor its func ⁇ tion, apart from the means of discrimination to implement to eliminate latent images.
- discrimination means designated as a whole in FIG. 7, can be advantageously integrated into. as head stage. in _. the processing unit 10 mentioned above. They may comprise storage means 21 for storing in memory the data defining the pattern formed by the layer 14, comparator means 22 capable of comparing the data stored at 21 with the data supplied by the sensor 9, selection means 23 to deliver a first signal
- blocking signal if the means of comparison identify an image of the pattern superimposed on a fingerprint image (the case of FIG. 5) or a second signal (unblocking or validation signal) if the
- the output of the selection means 23 is connected to an input of a gate 24 whose other input receives the output signal of the sensor 9.
- the gate 24 is closed under the control of the first signal and no signal is delivered by the -ci ( "image” "latent") and it is open “sub - control of the second signal and the signal from the sensor is supplied to the processing unit 10 (actual image) the comparator means 22 and. selection means 23 thus define detection means suitable for controlling discrimination means in the form of the door 24.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05778665A EP1759333B1 (fr) | 2004-06-23 | 2005-06-22 | Dispositif optique de capture biometrique par contact et installation mettant en oeuvre un tel dispositif |
US11/571,095 US7576843B2 (en) | 2004-06-23 | 2005-06-22 | Optical device for biometric capture by contact and system using said device |
DE602005003826T DE602005003826T2 (de) | 2004-06-23 | 2005-06-22 | Optische vorrichtung zur biometrischen erfassung mittels kontakt und system mit dieser vorrichtung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0406843A FR2872318B1 (fr) | 2004-06-23 | 2004-06-23 | Dispositif optique de capture biometrique par contact et installation mettant en oeuvre un tel dispositif |
FR0406843 | 2004-06-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006008396A1 true WO2006008396A1 (fr) | 2006-01-26 |
Family
ID=34945656
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2005/001578 WO2006008396A1 (fr) | 2004-06-23 | 2005-06-22 | Dispositif optique de capture biometrique par contact et installation mettant en oeuvre un tel dispositif |
Country Status (7)
Country | Link |
---|---|
US (1) | US7576843B2 (fr) |
EP (1) | EP1759333B1 (fr) |
CN (1) | CN100489886C (fr) |
AT (1) | ATE381072T1 (fr) |
DE (1) | DE602005003826T2 (fr) |
FR (1) | FR2872318B1 (fr) |
WO (1) | WO2006008396A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1840793A1 (fr) * | 2006-03-27 | 2007-10-03 | Fujitsu Limited | Dispositif d'authentification des empreintes digitales et dispositif de traitement d'informations |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2849246B1 (fr) * | 2002-12-20 | 2006-03-10 | Sagem | Procede de determination du caractere vivant d'un element porteur d'une empreinte digitale |
FR2897966B1 (fr) | 2006-02-24 | 2008-05-16 | Sagem Defense Securite | Biodetecteur sans contact |
US7598449B2 (en) | 2006-08-04 | 2009-10-06 | Zivix Llc | Musical instrument |
DE102008024320B4 (de) * | 2008-05-20 | 2017-02-23 | Infineon Technologies Ag | Sicheres Verfahren zur biometrischen Verifikation einer Person |
US8173887B2 (en) | 2008-10-07 | 2012-05-08 | Zivix Llc | Systems and methods for a digital stringed instrument |
US7897866B2 (en) * | 2008-10-07 | 2011-03-01 | Zivix Llc | Systems and methods for a digital stringed instrument |
US20120036982A1 (en) * | 2010-06-15 | 2012-02-16 | Daniel Sullivan | Digital and Analog Output Systems for Stringed Instruments |
CN102043947A (zh) * | 2010-12-16 | 2011-05-04 | 东莞市中控生物电子技术有限公司 | 一种小型指纹采集器 |
FR3015728B1 (fr) * | 2013-12-19 | 2019-04-19 | Morpho | Procede de validation destine a valider qu'un element est recouvert d'une vraie peau |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6154285A (en) * | 1998-12-21 | 2000-11-28 | Secugen Corporation | Surface treatment for optical image capturing system |
WO2001084477A1 (fr) * | 2000-04-29 | 2001-11-08 | Nitgen Co., Ltd. | Procede et dispositif de distinction d'empreintes digitales latentes dans un appareil optique d'entree d'empreintes digitales |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
HU214533B (hu) * | 1995-10-06 | 1998-03-30 | Dermo Corporation Ltd. | Detektor ujj élő jellegének felismerésére |
US6856383B1 (en) * | 1997-09-05 | 2005-02-15 | Security First Corp. | Relief object image generator |
JP4405656B2 (ja) * | 2000-10-20 | 2010-01-27 | 富士通株式会社 | 指紋情報を用いた個人認証システム及び同システム用登録・認証方法 |
JP2003006627A (ja) * | 2001-06-18 | 2003-01-10 | Nec Corp | 指紋入力装置 |
EP1399876B1 (fr) * | 2001-06-26 | 2014-11-19 | Casio Computer Co., Ltd. | Appareil d'acquisition d'images |
JP3751872B2 (ja) * | 2001-10-30 | 2006-03-01 | 日本電気株式会社 | 指紋入力装置 |
US7039224B2 (en) * | 2002-04-29 | 2006-05-02 | Activcard Ireland Limited | Method and device for preventing false acceptance of latent fingerprint images |
JP3684233B2 (ja) * | 2002-05-14 | 2005-08-17 | キヤノン株式会社 | 指紋入力装置及びその製造方法 |
-
2004
- 2004-06-23 FR FR0406843A patent/FR2872318B1/fr not_active Expired - Fee Related
-
2005
- 2005-06-22 EP EP05778665A patent/EP1759333B1/fr not_active Not-in-force
- 2005-06-22 AT AT05778665T patent/ATE381072T1/de not_active IP Right Cessation
- 2005-06-22 US US11/571,095 patent/US7576843B2/en not_active Expired - Fee Related
- 2005-06-22 WO PCT/FR2005/001578 patent/WO2006008396A1/fr active IP Right Grant
- 2005-06-22 DE DE602005003826T patent/DE602005003826T2/de active Active
- 2005-06-22 CN CNB2005800208920A patent/CN100489886C/zh not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6154285A (en) * | 1998-12-21 | 2000-11-28 | Secugen Corporation | Surface treatment for optical image capturing system |
WO2001084477A1 (fr) * | 2000-04-29 | 2001-11-08 | Nitgen Co., Ltd. | Procede et dispositif de distinction d'empreintes digitales latentes dans un appareil optique d'entree d'empreintes digitales |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1840793A1 (fr) * | 2006-03-27 | 2007-10-03 | Fujitsu Limited | Dispositif d'authentification des empreintes digitales et dispositif de traitement d'informations |
US8385611B2 (en) | 2006-03-27 | 2013-02-26 | Fujistu Limited | Fingerprint authentication device and information processing device with a sweep fingerprint sensor that acquires images of fingerprint at least two different sensitivity levels in single scan |
Also Published As
Publication number | Publication date |
---|---|
ATE381072T1 (de) | 2007-12-15 |
US20080062402A1 (en) | 2008-03-13 |
CN100489886C (zh) | 2009-05-20 |
EP1759333B1 (fr) | 2007-12-12 |
DE602005003826T2 (de) | 2008-07-03 |
EP1759333A1 (fr) | 2007-03-07 |
FR2872318B1 (fr) | 2006-09-22 |
FR2872318A1 (fr) | 2005-12-30 |
US7576843B2 (en) | 2009-08-18 |
DE602005003826D1 (de) | 2008-01-24 |
CN1998005A (zh) | 2007-07-11 |
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