WO2002077907A1 - Procede de guidage pour l'utilisateur d'un systeme biometrique avec entree d'empreintes digitales - Google Patents

Procede de guidage pour l'utilisateur d'un systeme biometrique avec entree d'empreintes digitales Download PDF

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Publication number
WO2002077907A1
WO2002077907A1 PCT/DE2002/000898 DE0200898W WO02077907A1 WO 2002077907 A1 WO2002077907 A1 WO 2002077907A1 DE 0200898 W DE0200898 W DE 0200898W WO 02077907 A1 WO02077907 A1 WO 02077907A1
Authority
WO
WIPO (PCT)
Prior art keywords
sensor
user
fingerprint
finger
instructions
Prior art date
Application number
PCT/DE2002/000898
Other languages
German (de)
English (en)
Inventor
Josef Birchbauer
Kurt Heschgl
Wolfgang Marius
Bernd Wachmann
Martin Winter
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to EP02729788A priority Critical patent/EP1371011A1/fr
Publication of WO2002077907A1 publication Critical patent/WO2002077907A1/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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/98—Detection or correction of errors, e.g. by rescanning the pattern or by human intervention; Evaluation of the quality of the acquired patterns
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/98—Detection or correction of errors, e.g. by rescanning the pattern or by human intervention; Evaluation of the quality of the acquired patterns
    • G06V10/993—Evaluation of the quality of the acquired pattern
    • 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
    • G06V40/1347—Preprocessing; Feature extraction
    • 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
    • G06V40/60—Static or dynamic means for assisting the user to position a body part for biometric acquisition
    • G06V40/67—Static or dynamic means for assisting the user to position a body part for biometric acquisition by interactive indications to the user

Definitions

  • the invention relates to a method for user guidance of a biometric system with fingerprint input, in which a user brings at least one finger into contact with / to a fingerprint sensor and the system uses the data supplied by the sensor to extract features for storage and / or Comparing the features.
  • fingerprints on an electronic basis has, in addition to the well-known importance in criminalistics, also gained considerable importance in many other areas, for example in credit card and cash dispensing machines, in access control to buildings and rooms, in authorization control in computer systems, telecommunications devices, etc.
  • a fingerprint sensor is used to enter a fingerprint into the respective system, which, for example, scans the finger surface, more precisely a fingertip, by means of optical or capacitive sensors or ultrasonic sensors.
  • Characteristics important for fingerprint recognition or for comparison are extracted from the information obtained, these being characteristics of the papillary lines of particular importance, namely end points, branches, islands and other singular characteristics, all called minutiae. This is explained in more detail, for example, in WO 98/52149 by the applicant.
  • a reference fingerprint which is used for comparison when the respective user enters a fingerprint.
  • Systems often have a library of fingerprints from different users or more than one finger from a single user.
  • the reference fingerprints can be provided to the system, for example, in electronic form, but there are many systems that are set up so that a user first enters the previously unknown fingerprint and this fingerprint is then stored in the system, of course together with one User names, code, etc. This process is called enrollment, in contrast to the so-called matching, in which, for example, a comparison is made between a currently entered fingerprint and a fingerprint stored in the system for identification.
  • Identification with the help of fingerprints offers a high level of security due to the uniqueness of a fingerprint, although it should be noted that this security depends on the type of feature extraction from the fingerprint image. The more accurate this extraction is, the more features are available to increase security. The problem arises that when a fingerprint is recorded with the aid of the sensor, a large number of errors can occur which lead to a qualitatively unsatisfactory recording of the fingerprint and then make it impossible to record a sufficient number of features or to make a sensible comparison.
  • the user receives a special incentive to help with the optimization if the instructions contain a representation of the current fingerprint captured by the sensor. It is useful if to display the current of the sensor a target geometry is displayed, such as a target area or target position.
  • the invention also has particular advantages if the instructions contain optimizing information relating to a physical correction of the finger surface, such as moistening, drying or cleaning.
  • the instructions contain optimizing information regarding the pressing force of the finger against a sensor surface.
  • the data supplied to the sensor are fed to an image acquisition and their image data are subjected to a quality assessment, the optimizing instructions being transmitted to the user only if the quality assessment results in a quality measure which is below a predeterminable minimum .
  • the quality assessment is carried out on the basis of individual features from which an overall quality measure is derived. In this case, an evaluated individual feature, for example the structure of the fingerprint lines, the covered sensor area, the uniformity of the gray distribution or the percentage of defective sensor pixels can be.
  • the task is also solved with a biometric system for performing the method according to the features specified above.
  • FIG. 1 shows a schematic representation of the sequence of the method according to the invention in a biometric system
  • FIG. 2 shows a possible screen illustration sketched in FIG. 1 with instructions for a user on a larger scale
  • FIG. 3 shows a further screen representation from FIG. 1, enlarged.
  • a biometric system for example one that controls the access authorization to a computer network, has a fingerprint input FAE, as used, for. B. in Connection with a computer mouse in WO 00/38096 and WO 00/38105 of the applicant is disclosed.
  • This fingerprint input FAE contains a fingerprint sensor FAS, the z. B. is formed as a semiconductor chip and based on electro-optical or capacitive methods scans the surface of a fingertip, which is placed on a support surface for this purpose, which can be integrated with the fingerprint sensor.
  • the data supplied by the FAS sensor is sent to an BQB image quality evaluation via an electronic BEF image acquisition.
  • Various features of the recorded fingerprint are recorded here, in particular the structure of the fingerprint lines, the sensor area covered by the finger, the uniformity of the gray distribution, the percentage of any defective sensor pixels, etc.
  • an overall image quality measure is derived from the different weighting of the individual quality features. If this dimension reaches a predefinable target dimension, the usual image processing takes place with feature extraction and then either an enrollment, a verification or an identification in the usual way.
  • a feedback logic is activated which aims to optimize the information supplied by the sensor FAS.
  • a knowledge base is used, in which, for. B. the properties and problems when recording with the sensor used are stored. This includes the type d. H. the principle of operation of the sensor, the dimensions of the sensor surface etc.
  • the knowledge base for a capacitive sensor contains the information that moist or wet skin leads to images that are too dark, but very dry skin leads to bright images.
  • a screen display is shown with an already recorded fingerprint.
  • the outline and relative position of the second image in relation to the first are shown symbolically as a grid provides.
  • Green color means an optimal compromise from the system's perspective between the reliability of the relative location estimate and the area enlargement achieved.
  • Yellow color indicates that only a little potential for improvement is possible by entering the second image, for example when the second image is completely contained in the first. Red color indicates that even the spatial assignment of the pictures is doubtful and therefore no improvement is to be expected
  • instructions can optionally also be output via a printer PRI or additionally or in simple cases also alone via a dot matrix PMA.
  • this dot matrix can consist, for example, of four light-emitting diodes which indicate to the user a directional correction with regard to the resting of the finger on the sensor. In the present case, the user should slide his finger in the direction of the flashing arrow in order to improve the image quality.
  • the dot matrix display can inform the user of the increase or decrease in quality by changing the display color, for example by changing from green to red or vice versa.
  • FIG. 2 shows a possible display structure with instructions for an enroument.
  • the sensor area is shown in the large field on the left ("Finger Data"), and the actually recorded area of a finger is faded in. The user can thus see here that his finger surface is clearly not being detected at the moment.
  • Finger Data the large field on the left
  • Below this field are three fields which, in the example considered, show how many of three fingerprints required for an enroUment have already been taken and processed. In the present case, it is indicated that a fingerprint has already been processed, but two further (empty) fields are required.
  • a possible display is to be illustrated, which indicates which of the fingers of one hand should be assigned next to the fingerprint entry.
  • the index finger of the right hand has already been registered, which is shown by the darkened round field, whereas the middle finger of the right hand is to be fed as the next finger, which is shown here by an arrow.
  • a pictorial instruction with text is shown, according to which the pressing force of the finger against the contact surface of the sensor FAS is to be increased. 2 of course require a monitor, but this is present anyway in connection with PC solutions.
  • the user is given instructions regarding the quality (fingerprint quality) and the actual contact surface (fingerprint area) on a monitor image in connection with a matching, which is indicated by rising or falling bars which in practice have different colors display, is done.
  • the user receives a pictorial representation of the captured fingerprint compared to the entire sensor area.
  • a font is shown (IMPRESSION TOO SMALL), which indicates that the total print area is too small.
  • the user will therefore try to increase this area by correspondingly moving or pressing on his finger, etc., which also increases the bar on the right (fingerprint area) and enables a successful comparison.
  • the feedback and the image quality evaluation are therefore in a mutual relationship or a causal connection.
  • the image quality assessment eliminates lower quality fingerprints that do not appear to be suitable for further processing and / or feature extraction, and the feedback analyzes the cause of the image rejection and then clarifies the system view to the user.
  • a precise diagnosis in connection with previous knowledge (knowledge base) about possible causes of problems enables the formulation of concrete solution proposals, in particular via a visualization, which of course has to be adapted to the circumstances and the technical possibilities of the system used.
  • One essence of the invention is evidently that it can lead the user to a certain behavior when using a biometric system. Any problems are presented to the user in a transparent and generally understandable manner, so that, assuming the user's cooperative behavior, interaction with the system increases the recognition performance and, for example, access control can be made much more convenient.
  • the invention also takes into account a recurring unexpected or undesirable behavior of a user, as well as the fact that the skin condition in combination with the measuring principle used in each case is a limiting factor.
  • the optimal visual representation on a monitor can be dispensed with and messages can be output via simple LCD displays or in printed form, some of which are given for illustration:
  • the invention is particularly advantageous for the EnroUment, which generally represents the user's first contact with the system and subsequently decisively determines recognition, since it enables suitable user guidance.
  • the color coding of the grid lines in the sense of the usual traffic light colors can be used, for example Probability of success for a merger can be expressed. Thanks to the invention, relatively complex facts can be made transparent for the user and reduced to the comparatively simple task of maximizing the chances of success by varying the sensor / finger interaction.

Abstract

L'invention concerne un procédé de guidage pour l'utilisateur d'un système biométrique avec entrée d'empreintes digitales, caractérisé en ce qu'un utilisateur met au moins un doigt en contact avec un détecteur d'empreintes digitales (FAS) ou vers un tel détecteur, et en ce que le système effectue, à partir des données fournies par le détecteur, une extraction de caractères distinctifs pour une mémorisation et/ou une comparaison de ces caractères distinctifs. On transmet ainsi à l'utilisateur, en fonction de l'interaction détecteur/doigt, des instructions optiques et/ou acoustiques visant à une optimisation, selon des critères prédéterminés, de l'information fournie de la part du détecteur.
PCT/DE2002/000898 2001-03-21 2002-03-13 Procede de guidage pour l'utilisateur d'un systeme biometrique avec entree d'empreintes digitales WO2002077907A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02729788A EP1371011A1 (fr) 2001-03-21 2002-03-13 Procede de guidage pour l'utilisateur d'un systeme biometrique avec entree d'empreintes digitales

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA453/2001 2001-03-21
AT4532001 2001-03-21

Publications (1)

Publication Number Publication Date
WO2002077907A1 true WO2002077907A1 (fr) 2002-10-03

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Cited By (50)

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WO2005106774A2 (fr) * 2004-04-23 2005-11-10 Validity Sensors, Inc. Procedes et appareil permettant l'acquisition d'une image d'empreinte digitale par glissement
FR2880157A1 (fr) * 2004-12-28 2006-06-30 Sagem Dispositif optique de capture biometrique avec affichage d'information a destination de l'utilisateur
US7099496B2 (en) 2000-12-05 2006-08-29 Validity Sensors, Inc. Swiped aperture capacitive fingerprint sensing systems and methods
EP1903509A1 (fr) * 2006-09-14 2008-03-26 Fujitsu Ltd. Procédé de contrôle de guidage d'organisme vivant pour un dispositif d'authentification biométrique et dispositif d'authentification biométrique
US7460697B2 (en) 2005-07-19 2008-12-02 Validity Sensors, Inc. Electronic fingerprint sensor with differential noise cancellation
US7463756B2 (en) 2004-04-16 2008-12-09 Validity Sensors, Inc. Finger position sensing methods and apparatus
EP1715443A3 (fr) * 2005-04-22 2009-11-18 Hitachi-Omron Terminal Solutions, Corp. Appareil d'authentification biométrique
EP2161676A1 (fr) * 2008-09-05 2010-03-10 Fujitsu Limited Dispositif d'authentification d'empreintes digitales, programme d'authentification d'empreintes digitales, et procédé d'authentification d'empreintes digitales
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EP2234034A2 (fr) * 2003-08-26 2010-09-29 Hitachi, Ltd. Dispositif et procédé d'identification de personnes
US8005276B2 (en) 2008-04-04 2011-08-23 Validity Sensors, Inc. Apparatus and method for reducing parasitic capacitive coupling and noise in fingerprint sensing circuits
US8107212B2 (en) 2007-04-30 2012-01-31 Validity Sensors, Inc. Apparatus and method for protecting fingerprint sensing circuitry from electrostatic discharge
US8116540B2 (en) 2008-04-04 2012-02-14 Validity Sensors, Inc. Apparatus and method for reducing noise in fingerprint sensing circuits
US8131026B2 (en) 2004-04-16 2012-03-06 Validity Sensors, Inc. Method and apparatus for fingerprint image reconstruction
US8165355B2 (en) 2006-09-11 2012-04-24 Validity Sensors, Inc. Method and apparatus for fingerprint motion tracking using an in-line array for use in navigation applications
US8175345B2 (en) 2004-04-16 2012-05-08 Validity Sensors, Inc. Unitized ergonomic two-dimensional fingerprint motion tracking device and method
US8204281B2 (en) 2007-12-14 2012-06-19 Validity Sensors, Inc. System and method to remove artifacts from fingerprint sensor scans
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US8229184B2 (en) 2004-04-16 2012-07-24 Validity Sensors, Inc. Method and algorithm for accurate finger motion tracking
US8811688B2 (en) 2004-04-16 2014-08-19 Synaptics Incorporated Method and apparatus for fingerprint image reconstruction
US7463756B2 (en) 2004-04-16 2008-12-09 Validity Sensors, Inc. Finger position sensing methods and apparatus
US8315444B2 (en) 2004-04-16 2012-11-20 Validity Sensors, Inc. Unitized ergonomic two-dimensional fingerprint motion tracking device and method
US8358815B2 (en) 2004-04-16 2013-01-22 Validity Sensors, Inc. Method and apparatus for two-dimensional finger motion tracking and control
WO2005106774A3 (fr) * 2004-04-23 2006-06-01 Validity Sensors Inc Procedes et appareil permettant l'acquisition d'une image d'empreinte digitale par glissement
US8077935B2 (en) 2004-04-23 2011-12-13 Validity Sensors, Inc. Methods and apparatus for acquiring a swiped fingerprint image
WO2005106774A2 (fr) * 2004-04-23 2005-11-10 Validity Sensors, Inc. Procedes et appareil permettant l'acquisition d'une image d'empreinte digitale par glissement
US8867799B2 (en) 2004-10-04 2014-10-21 Synaptics Incorporated Fingerprint sensing assemblies and methods of making
US8224044B2 (en) 2004-10-04 2012-07-17 Validity Sensors, Inc. Fingerprint sensing assemblies and methods of making
US7751601B2 (en) 2004-10-04 2010-07-06 Validity Sensors, Inc. Fingerprint sensing assemblies and methods of making
WO2006070119A3 (fr) * 2004-12-28 2006-11-09 Safran Dispositif optique de capture biometrique avec affichage d'information a destination de l'utilisateur
US8149088B2 (en) 2004-12-28 2012-04-03 Sagem Securite Optical biometric acquisition device with information display intended for the user
WO2006070119A2 (fr) * 2004-12-28 2006-07-06 Sagem Defense Securite Dispositif optique de capture biometrique avec affichage d'information a destination de l'utilisateur
FR2880157A1 (fr) * 2004-12-28 2006-06-30 Sagem Dispositif optique de capture biometrique avec affichage d'information a destination de l'utilisateur
EP1715443A3 (fr) * 2005-04-22 2009-11-18 Hitachi-Omron Terminal Solutions, Corp. Appareil d'authentification biométrique
US7460697B2 (en) 2005-07-19 2008-12-02 Validity Sensors, Inc. Electronic fingerprint sensor with differential noise cancellation
US8165355B2 (en) 2006-09-11 2012-04-24 Validity Sensors, Inc. Method and apparatus for fingerprint motion tracking using an in-line array for use in navigation applications
US8693736B2 (en) 2006-09-11 2014-04-08 Synaptics Incorporated System for determining the motion of a fingerprint surface with respect to a sensor surface
US8447077B2 (en) 2006-09-11 2013-05-21 Validity Sensors, Inc. Method and apparatus for fingerprint motion tracking using an in-line array
US8184866B2 (en) 2006-09-14 2012-05-22 Fujitsu Limited Living body guidance control method for a biometrics authentication device, and biometrics authentication device
EP1903509A1 (fr) * 2006-09-14 2008-03-26 Fujitsu Ltd. Procédé de contrôle de guidage d'organisme vivant pour un dispositif d'authentification biométrique et dispositif d'authentification biométrique
US8107212B2 (en) 2007-04-30 2012-01-31 Validity Sensors, Inc. Apparatus and method for protecting fingerprint sensing circuitry from electrostatic discharge
US8290150B2 (en) 2007-05-11 2012-10-16 Validity Sensors, Inc. Method and system for electronically securing an electronic device using physically unclonable functions
US8276816B2 (en) 2007-12-14 2012-10-02 Validity Sensors, Inc. Smart card system with ergonomic fingerprint sensor and method of using
US8204281B2 (en) 2007-12-14 2012-06-19 Validity Sensors, Inc. System and method to remove artifacts from fingerprint sensor scans
US8005276B2 (en) 2008-04-04 2011-08-23 Validity Sensors, Inc. Apparatus and method for reducing parasitic capacitive coupling and noise in fingerprint sensing circuits
USRE45650E1 (en) 2008-04-04 2015-08-11 Synaptics Incorporated Apparatus and method for reducing parasitic capacitive coupling and noise in fingerprint sensing circuits
US8520913B2 (en) 2008-04-04 2013-08-27 Validity Sensors, Inc. Apparatus and method for reducing noise in fingerprint sensing circuits
US8787632B2 (en) 2008-04-04 2014-07-22 Synaptics Incorporated Apparatus and method for reducing noise in fingerprint sensing circuits
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