WO2000039743A1 - Appareil et procede de detection des empreintes digitales - Google Patents

Appareil et procede de detection des empreintes digitales Download PDF

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Publication number
WO2000039743A1
WO2000039743A1 PCT/US1999/030370 US9930370W WO0039743A1 WO 2000039743 A1 WO2000039743 A1 WO 2000039743A1 US 9930370 W US9930370 W US 9930370W WO 0039743 A1 WO0039743 A1 WO 0039743A1
Authority
WO
WIPO (PCT)
Prior art keywords
finger
fingeφrint
input sensor
measured
generally
Prior art date
Application number
PCT/US1999/030370
Other languages
English (en)
Inventor
Curt Harkless
Original Assignee
Arete Associates
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Arete Associates filed Critical Arete Associates
Priority to AU29593/00A priority Critical patent/AU2959300A/en
Publication of WO2000039743A1 publication Critical patent/WO2000039743A1/fr

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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

  • Fingerprint capture i.e., sensing and verifying fingerprints
  • these devices utilized optical means. Rather than utilize every feature or detail of a fingerprint, they selectively chose a limited selection of features such as intersection points to define a fingerprint. This worked reasonably well so long as all or most of the finge ⁇ rint was sensed. Thus, for repeatable high-accuracy sensing a relatively large sensor that would capture essentially the full finge ⁇ rint was required.
  • Such optical sensors range in size from about 10 x 20 mm to about 25 x 40 mm.
  • the cost of such devices can be relatively high, in the nature of several hundred dollars.
  • Newer solid-state technology is emerging utilizing microprocessor boards with advanced silicon capacitance-based sensors.
  • the cost of these silicon sensors is directly related to their size. Obviously from a cost standpoint, the smaller the better.
  • Such silicon sensors generally range in size from about 12.5 x 12.5 mm to about 15 x 20 mm.
  • advanced finge ⁇ rint analysis algorithms have been developed. These algorithms permit high- accuracy finge ⁇ rint identification based on sensing only the core area of a finge ⁇ rint rather than the full finge ⁇ rint. Generally a region about 10 mm in diameter is sufficient. This in turn allows use of relatively small size less expensive silicon sensors that need only sense the finge ⁇ rint core area.
  • the optical sensors that sampled a full finge ⁇ rint did not demand as high a degree of alignment between the sensors and the finge ⁇ rint as required for the silicon sensors.
  • Prior techniques for alignment of a finge ⁇ rint with a sensor did not provide the desired high degree of repeatable high-accuracy finge ⁇ rint verification when used with the smaller silicon sensors.
  • Such prior techniques provided reasonable transverse or side- to-side locating, but were significantly lacking in longitudinal locating.
  • efforts to utilize the end of the finger being sensed have produced less than desired results.
  • the primary problem is that the distance from the finger tip to the finge ⁇ rint core area tends to vary significantly from person to person. Further long finger nails will also contribute to this problem.
  • the illustrated devices and methods repeatedly and accurately locate a finger for pu ⁇ oses of sensing the finger's finge ⁇ rint.
  • a ridge or rib that extends transversely of the finger is engagable by the crease at the first joint of the finger. This ridge is spaced a predetermined distance from the center of the silicon sensor measured longitudinal, i.e., in the direction in which the finger extends.
  • the preferred ridge to sensor center distance is approximately 12.5mm for fingers and 15.0mm for thumbs. This ensures that the core will lie in the field of view of the sensor. It also maintains the core at the desired location by not allowing the finger to move or longitudinally slide off the sensor.
  • one of the key failure modes for finge ⁇ rint comparison is the presence of large distortion in the measured finge ⁇ rint image.
  • Large distortions result when the finger is slid across the sensor surface.
  • the presence of the ridge makes it uncomfortable for the user to slide their finger along the sensor surface and thereby discourages large distortion.
  • the finger makes contact with the senor surface only after ridge has settled into the crease, locking the finger in place.
  • Placing the ridge at a fixed distance from the center of the sensor has another beneficial effect. It facilitates comparisons of finge ⁇ rints collected using different sensors of varying geometry. In this way, it makes finge ⁇ rint verification sensor independent.
  • the ridge provides a very reliable method for preserving the utility of current enrollments. By locating the ridge at a fixed distance from the center of each sensor, enrollments on one sensor type can be compared to live scan finge ⁇ rints from another sensor.
  • the ridge provides a point of reference by ensuring that the user's finger is consistently placed and locating the crease of the user's finger a fixed distance from the center of the sensor for both sensors. This is illustrated in Figures 8a and 8b.
  • Sensor independence can be further enhanced by creating an ergonomic "universal" fingerguide that appears identical to the user, but in fact contains sensors of varying types.
  • a mask could be envisioned as a rectangular unit having a rectangular aperture matched to the sensors active area.
  • the top of the mask would also contain a finger trough to guide finger placement and the ridge.
  • the bottom of the mask would provide sensor specific mounting supports (invisible to the user). In this way, upgrading a device could be as simple as removing a finger mask with one sensor and replacing it with a same sized mask, but containing a completely different sensor.
  • This arrangement has been found to produce highly repeatable and accurate sensing of f ⁇ nge ⁇ rints, including in particular sensing of the core area of a finge ⁇ rint using a small size silicon sensor.
  • the ridge has an arcuate depression at its center which receives and centers the finger in the transverse direction.
  • a physical structure a projection or a depression
  • the finger is thus guided by the "feel" of the guide structure, i.e. the ridge and the center finger-tip structure, to the proper position. The finger is thus accurately located longitudinally, as well as transversely.
  • a longitudinal channel or depression may also be provided. Further, the side edges of a window or cutout that provides access to the sensor may also assist in transverse locating of the finger.
  • the ridge may be transversely generally linear without the center recess, and transverse positioning means may be provided such as spaced-apart parallel side rails to engage the sides of the finger.
  • the device may be a self contained unit having a housing.
  • the housing has an upper wall that provides the finger locating ridge and other locating structure.
  • the upper wall also has the window which is aligned with the silicon sensor.
  • This device also includes electronic means for storing finge ⁇ rint templates, for comparing the sensed finge ⁇ rint data for a designated person with the stored template for that person, and for providing output based on the result of that comparison.
  • the output may actuate an indicator such as a 3-color LED mounted on the housing.
  • the output may also provide an electrical signal through a serial port on the housing for controlling other apparatus such as time and attendance apparatus or security entry control apparatus.
  • the device may be provided as an OEM unit for inco ⁇ oration into another apparatus which may have its own template storage capacity and/or its own comparison capacity.
  • the sensing device would then need only to sense the finge ⁇ rint data and pass it along to the other apparatus.
  • Figure 1 is a perspective view of a self-contained finge ⁇ rint sensing and verifying device that is a presently preferred embodiment of the invention.
  • Figure 2 is a schematic enlarged view of the locating ridge of the device of
  • Figure 3 is a further enlarged sectional view through the ridge of Figure 2.
  • Figure 4 is a schematic diagram of components of the device of Figure 1.
  • Figure 5 is a schematic view of an alternative embodiment of locating structure.
  • Figure 6 is a top plan view of a finger mask that is also a presently preferred embodiment of the invention.
  • Figure 7 is a side sectional view of the finger mask of Figure 6.
  • Figures 8a and 8b are schematic views illustrating optical and sold-state sensors relative to a ridge guide. Detailed Description Of The Drawings
  • FIGS 1-4 illustrates a presently preferred form of the invention as a self- contained finge ⁇ rint sensing and verifying device or apparatus 10.
  • This device 10 utilizes an advanced silicon capacitance-based sensor 20 to sense the core area of a desired finge ⁇ rint.
  • the device 10 also operates to verify the authenticity of the finge ⁇ rint is belonging to a specified person.
  • the sensed data as to the finge ⁇ rint core area is compared to a template of the finge ⁇ rint core area of that person.
  • the success or failure of the verification may be presented as a red or green light from a 3-color LED.
  • Output from the device 10 may also operate other apparatus, such as a door lock or a time clock, based on the verification result.
  • the device 10 includes finger locating or positioning means 30 to precisely locate and maintain the finge ⁇ rint core area of the finger in alignment with the silicon sensor.
  • the illustrated silicon sensor 30 is generally rectangular, measuring from approximately 12.5 x 12.5 mm to approximately 15 x 20 mm.
  • the illustrated positioning means 30 includes a transversely extending ridge 32 with a centered arcuate recess 34. The ridge 32 is spaced approximately 12.5 to 15mm from the center of the silicon sensor 20, measured longitudinally.
  • the illustrated device 10 has a generally rectangular housing 12.
  • the housing 12 has an upper wall 14 with a rectangular window 16 in the form of a cut out to provide access to the silicon capacitance-based sensor 20 mounted in the housing.
  • the window 16 is positioned generally centrally of the upper wall 14.
  • the sensor 20 may be mounted on a mezzanine microprocessor board 22 that is secured to the underside of the upper wall 14 so that the sensor extends generally horizontally immediately below the window 16.
  • the housing 12 may be a molded plastic or silicone formed with positioning or locating guide means 30 on the upper wall 14.
  • the illustrated guide means 30 includes an elongated shallow channel groove or recess
  • the illustrated channel 35 has a curved or arcuate cross section.
  • the direction of the channel 36 and the finger received therein will be referred to herein as the longitudinal direction or dimension.
  • the direction or dimension at right angles to the channel 36 will be referred to herein as the transverse direction or dimension.
  • the channel 36 extends over the window 16.
  • the upright ridge or rib 32 Extending transversely across the channel is the upright ridge or rib 32 for engaging the finger crease at the first joint of the finger.
  • the upper edge of the illustrated ridge 32 is generally rounded with a diameter of about 1 mm.
  • the illustrated ridge 32 has a height of about 2 mm and a width of about 1 mm.
  • the ridge 32 follows the arcuate curve of the channel 36 whereby the center portion of the ridge forms the curved center recess 34.
  • This center recess 34 of the ridge serves to receive and position the finger at its first joint generally centered and transversely aligned with the sensor 20.
  • the ridge 32 is located about 12.5 to 15mm spaced longitudinally from the center of the sensor.
  • the core area of the finger's finge ⁇ rint When the crease of the finger is on the ridge 32, the core area of the finger's finge ⁇ rint will be generally centered over the sensor 20. The ridge tends to maintain the finger in this position, limiting longitudinal sliding or movement of the finger relative to the sensor 20. This facilitates the high-accuracy sensing of that core area.
  • the range from 12.5 to 15mm is a practical but workable compromise.
  • the more precise measurement for the thumb is about 16 mm ⁇ 3 mm standard deviation.
  • the more precise measurement for the other fingers is about 12.5 mm ⁇ 2.5 mm standard deviation.
  • the use of a distance in the range of about 12.5 to 15mm allows the device to be used for thumb and fingers.
  • Devices may have a ridge distance selected based on the application. For example, a key chain device would generally verify the thumb print.
  • the transverse positioning of the finger is also facilitated by the longitudinal channel 36, and by the side edges 38 of the window 16.
  • the area of the channel 36 around the sensor window 16 is hollowed out by a shallow curved depression 40 which can help accommodate larger fingers and aid in finger locating, as well as offering a more comfortable feeling to the user.
  • the forward end 42 of the channel 36 provides a center locating guide for the tip of the finger. This helps to prevent the finger from being tilted or angled away from the longitudinal direction.
  • the entire channel 36 serves to ensure that the finger is pressed as flat as possible against the sensor 20, which contributes to accurate sensing.
  • FIG 4 illustrates schematically the electronic components of the device 10.
  • the mezzanine board 22 on which the silicon sensor 20 is mounted is connected to a main processing board 24.
  • the main processing board 24 provides various control and operational functions. Initially, when the board 24 is set to enrollment mode, data as to the finge ⁇ rints of various persons is sensed and then stored as data in the form of templates of the finge ⁇ rints belonging to the particular persons.
  • the board 24 when the board 24 is set to sensing and verifying mode, data sensed as to the finge ⁇ rint of a designated person is compared to the data or template of that person. Finally, operating in its control function, the board 24 provides an output signal based on the results of the comparison.
  • This output signal may operate an external apparatus such as a door lock 26.
  • the output signal may also operate an indicator 28 such as a 3-color LED on the housing 12, or provide a sound indication or the like.
  • Figure 5 shows an alternate configuration of finger locating structure 130 where the ridge 132 is generally transversely linear without a center recess. Side-to-side and anti-tilting positioning are provided by a pair of upright longitudinally extending side rails 144. This alternate configuration is somewhat simpler and less costly than the configuration of Figures 1-4 but it tends not do provide as good or consistent results.
  • FIGS 6 and 7 illustrates a finger mask unit 210 that is also presently preferred.
  • Finger mask unit 210 is not self-contained but is designed for integration into another piece of external OEM equipment or apparatus such as a time clock.
  • This illustrated finger mask unit 210 includes a container section 212.
  • Container section 212 holds a mezzanine board 22 on which is mounted an advanced silicon capacitance-based sensor
  • the illustrated finger mask unit 210 includes a side section or flange 218 at either side of the container section 212 for mounting the finger mask unit to the case 219 of the OEM equipment by suitable means such as screws (not shown).
  • the container section 212 has an upper wall 214 that provides finger locating or positioning means 230.
  • the illustrated locating means 230 includes a transverse ridge 232 with an arcuate central recess 234 for locating and maintaining the finger position, particularly longitudinally.
  • the locating means 230 also includes a longitudinal finger receiving channel 236 with a finger-tip receiving forward end 242.
  • This finger mask unit 210 may interface with the time-keeping machine that stores the finge ⁇ rint data templates, does the comparisons, and provides the verification output to control the machine.
  • the finger mask unit 210 would simply do the sensing and provide the sensed data as to be finge ⁇ rint to the time-keeping machine.

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  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Image Input (AREA)

Abstract

L'invention concerne un dispositif (10) et un procédé pour détecter une empreinte digitale de façon répétitive et avec précision. Selon le procédé de l'invention, le doigt comportant l'empreinte digitale à détecter doit être placé avec précision et maintenu sur un capteur (20). Plus particulièrement, une arête transversale (32) est sollicitée par un pli au niveau de la première articulation d'un doigt, ce qui permet de positionner et de maintenir l'empreinte digitale longitudinalement par rapport au capteur (20). L'arête (32) peut comporter un enfoncement au centre arqué (34) servant à accueillir et à centrer le doigt dans la direction transversale. En outre, on peut mettre en place d'autres structures de guidage telles qu'un canal longitudinal (36) qui aide à positionner le doigt latéralement ou un guide avant (42) qui entre en contact avec le bout du doigt et contrôle l'angle du doigt. Ce dispositif est particulièrement utile avec un capteur de faibles dimensions à capacités à base de silicium à l'état solide qui détecte la zone noyau de l'empreinte digitale plutôt que la totalité de celle-ci, ce qui permet une plus grande précision du positionnement.
PCT/US1999/030370 1998-12-28 1999-12-17 Appareil et procede de detection des empreintes digitales WO2000039743A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU29593/00A AU2959300A (en) 1998-12-28 1999-12-17 Apparatus and method for sensing fingerprints

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US11404398P 1998-12-28 1998-12-28
US60/114,043 1998-12-28
US37040899A 1999-08-09 1999-08-09
US09/370,408 1999-08-09

Publications (1)

Publication Number Publication Date
WO2000039743A1 true WO2000039743A1 (fr) 2000-07-06

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PCT/US1999/030370 WO2000039743A1 (fr) 1998-12-28 1999-12-17 Appareil et procede de detection des empreintes digitales

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WO (1) WO2000039743A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1812890A2 (fr) * 2004-11-03 2007-08-01 Pen-One, Inc. Dispositif de guidage du doigt
EP1812889A2 (fr) * 2004-11-03 2007-08-01 Pen-One, Inc. Dispositif guide doigt destine a etre utilise avec un stylet ou un crayon
EP1894524A1 (fr) * 2005-06-13 2008-03-05 Hitachi, Ltd. Dispositif d'authentification de veine
US7418255B2 (en) 2002-02-21 2008-08-26 Bloomberg Finance L.P. Computer terminals biometrically enabled for network functions and voice communication
CN101536908A (zh) * 2005-06-13 2009-09-23 株式会社日立制作所 图像处理装置及其图像处理方法、个人认证方法
US7929736B2 (en) 2004-11-03 2011-04-19 Pen-One, Inc. Finger guide device for use with stylus or pen
US8805028B2 (en) 2005-09-14 2014-08-12 Hitachi, Ltd. Personal identification device using vessel pattern of fingers
US9171233B2 (en) 2006-02-02 2015-10-27 Hitachi, Ltd. Biometric information processing device and biometric information processing program
CN103559477B (zh) * 2004-11-03 2017-06-13 笔一公司 用于触针或钢笔的手指引导装置
US9760753B2 (en) 2004-11-03 2017-09-12 Pen-One Acquisition Group, Llc Finger guide device
GB2551955A (en) * 2016-05-04 2018-01-10 Zwipe As Fingerprint authorisable device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3975711A (en) * 1974-08-30 1976-08-17 Sperry Rand Corporation Real time fingerprint recording terminal
US4394773A (en) * 1980-07-21 1983-07-19 Siemens Corporation Fingerprint sensor
JPS61175865A (ja) * 1985-01-31 1986-08-07 Mitsubishi Electric Corp 個人識別装置
US5603179A (en) * 1995-10-11 1997-02-18 Adams; Heiko B. Safety trigger
US5828773A (en) * 1996-01-26 1998-10-27 Harris Corporation Fingerprint sensing method with finger position indication

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3975711A (en) * 1974-08-30 1976-08-17 Sperry Rand Corporation Real time fingerprint recording terminal
US4394773A (en) * 1980-07-21 1983-07-19 Siemens Corporation Fingerprint sensor
JPS61175865A (ja) * 1985-01-31 1986-08-07 Mitsubishi Electric Corp 個人識別装置
US5603179A (en) * 1995-10-11 1997-02-18 Adams; Heiko B. Safety trigger
US5828773A (en) * 1996-01-26 1998-10-27 Harris Corporation Fingerprint sensing method with finger position indication

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9378347B2 (en) 2002-02-21 2016-06-28 Bloomberg Finance L.P. Computer terminals biometrically enabled for network functions and voice communication
US7418255B2 (en) 2002-02-21 2008-08-26 Bloomberg Finance L.P. Computer terminals biometrically enabled for network functions and voice communication
US10313501B2 (en) 2002-02-21 2019-06-04 Bloomberg Finance L.P. Computer terminals biometrically enabled for network functions and voice communication
US9912793B2 (en) 2002-02-21 2018-03-06 Bloomberg Finance L.P. Computer terminals biometrically enabled for network functions and voice communication
US10979549B2 (en) 2002-02-21 2021-04-13 Bloomberg Finance L.P. Computer terminals biometrically enabled for network functions and voice communication
CN103559477B (zh) * 2004-11-03 2017-06-13 笔一公司 用于触针或钢笔的手指引导装置
US9830493B2 (en) 2004-11-03 2017-11-28 Pen-One Acquisition Group, Llc Finger guide device with capacitive sensor
US7929736B2 (en) 2004-11-03 2011-04-19 Pen-One, Inc. Finger guide device for use with stylus or pen
EP1812890A4 (fr) * 2004-11-03 2008-02-20 Pen One Inc Dispositif de guidage du doigt
US9760753B2 (en) 2004-11-03 2017-09-12 Pen-One Acquisition Group, Llc Finger guide device
EP1812889A4 (fr) * 2004-11-03 2008-02-13 Pen One Inc Dispositif guide doigt destine a etre utilise avec un stylet ou un crayon
EP1812889A2 (fr) * 2004-11-03 2007-08-01 Pen-One, Inc. Dispositif guide doigt destine a etre utilise avec un stylet ou un crayon
AU2005327155B2 (en) * 2004-11-03 2011-03-17 Pen-One, Inc. Finger guide device for use with stylus or pen
EP1812890A2 (fr) * 2004-11-03 2007-08-01 Pen-One, Inc. Dispositif de guidage du doigt
EP1894524A1 (fr) * 2005-06-13 2008-03-05 Hitachi, Ltd. Dispositif d'authentification de veine
US8238622B2 (en) 2005-06-13 2012-08-07 Hitachi, Ltd. Vein authentication device
EP1894524A4 (fr) * 2005-06-13 2009-05-06 Hitachi Ltd Dispositif d'authentification de veine
US7680305B2 (en) 2005-06-13 2010-03-16 Hitachi, Ltd. Vein authentication device
CN101536908A (zh) * 2005-06-13 2009-09-23 株式会社日立制作所 图像处理装置及其图像处理方法、个人认证方法
US7945073B2 (en) 2005-06-13 2011-05-17 Hitachi, Ltd. Vein authentication device
US8805028B2 (en) 2005-09-14 2014-08-12 Hitachi, Ltd. Personal identification device using vessel pattern of fingers
US9171233B2 (en) 2006-02-02 2015-10-27 Hitachi, Ltd. Biometric information processing device and biometric information processing program
GB2551955A (en) * 2016-05-04 2018-01-10 Zwipe As Fingerprint authorisable device

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