WO2015119078A1 - Dispositif d'authentification biométrique utilisant un prisme d'authentification de doigt et procédé d'authentification biométrique - Google Patents

Dispositif d'authentification biométrique utilisant un prisme d'authentification de doigt et procédé d'authentification biométrique Download PDF

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Publication number
WO2015119078A1
WO2015119078A1 PCT/JP2015/052839 JP2015052839W WO2015119078A1 WO 2015119078 A1 WO2015119078 A1 WO 2015119078A1 JP 2015052839 W JP2015052839 W JP 2015052839W WO 2015119078 A1 WO2015119078 A1 WO 2015119078A1
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WIPO (PCT)
Prior art keywords
finger
imaging
reflected
light
authentication
Prior art date
Application number
PCT/JP2015/052839
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English (en)
Japanese (ja)
Inventor
輝幸 樋口
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日本電気株式会社
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Publication date
Application filed by 日本電気株式会社 filed Critical 日本電気株式会社
Priority to JP2015560972A priority Critical patent/JP6443349B2/ja
Publication of WO2015119078A1 publication Critical patent/WO2015119078A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/117—Identification of persons
    • A61B5/1171—Identification of persons based on the shapes or appearances of their bodies or parts thereof
    • A61B5/1172—Identification of persons based on the shapes or appearances of their bodies or parts thereof using fingerprinting
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/10—Image acquisition
    • G06V10/12—Details of acquisition arrangements; Constructional details thereof
    • G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
    • G06V10/143—Sensing or illuminating at different wavelengths
    • 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

Definitions

  • the present invention relates to a biometric authentication apparatus and a biometric authentication method using a finger authentication prism.
  • This application claims priority based on Japanese Patent Application No. 2014-21109 for which it applied to Japan on February 6, 2014, and uses the content here.
  • Patent Document 1 discloses an optical image acquisition system as a biometric authentication device, and performs personal authentication using a fingerprint that forms a biometric feature using a total reflection critical angle by a triangular prism.
  • the biometric authentication device reads irregularities (that is, ridges and valleys) on the skin surface of the finger, and can easily obtain a high-contrast fingerprint image. For this reason, it is compatible with a “print fingerprint” which is obtained by applying ink to a fingertip and pressing it onto paper, and is used in the judicial bureau, police station and the like.
  • Patent Document 2 discloses an authentication device and an authentication method for collecting an image of a finger using a prism having a truncated pyramid shape.
  • Patent Document 3 discloses a personal identification device that performs personal identification based on a blood vessel fluoroscopic image obtained by imaging a subcutaneous blood vessel pattern of a hand.
  • Patent Document 4 discloses a personal identification device for personal identification based on a fingerprint image.
  • Patent Document 5 discloses a biometric authentication device that performs personal authentication by reading a plurality of biometric images using a prism.
  • Patent Document 6 discloses a biometric authentication apparatus that can simultaneously perform iris authentication, fingerprint authentication, and vein authentication.
  • Patent Document 7 discloses an authentication imaging device that captures an authentication pattern of a palm or a finger.
  • Patent Document 8 discloses an authentication imaging device that photographs a finger and a palm.
  • the finger when shooting a fingerprint without pressing the finger against the glass as in the non-contact method, the finger can be flexibly deformed, so the image of the finger shot against the glass and the finger taken without pressing against the glass The degree of change in the shape of the finger differs from the image, and the contact-type finger fingerprint image differs from the non-contact-type finger fingerprint image.
  • the fingerprint image taken by the non-contact method is not compatible with the imprint fingerprint using the prism. Further, in the visual inspection method used by the judicial authorities, fingerprint images taken by the non-contact method have a small contrast and are inappropriate.
  • biometric authentication has been performed by combining a plurality of biometric features in addition to fingerprints in order to increase the accuracy of biometric verification.
  • the finger blood vessel pattern is an effective biometric feature, personal verification is performed by combining the finger fingerprint and the blood vessel pattern.
  • the present invention solves the above problems, and an object of the present invention is to provide a biometric authentication apparatus and a biometric authentication method using a finger authentication prism that can perform highly accurate personal authentication in a short time.
  • a first embodiment of the present invention is a biometric authentication device that includes a finger authentication prism, an imaging device, a visible light source, and an infrared light source.
  • the finger authentication prism includes a finger placement surface on which a finger to be authenticated is placed, an imaging surface disposed in parallel and opposite to the finger placement surface, and a reflection disposed at a predetermined angle with respect to the finger placement surface and the imaging surface. A surface.
  • the finger authentication prism is arranged so that the longitudinal direction of the finger installation surface coincides with the longitudinal direction of the finger.
  • Irradiation light from a visible light source and / or an infrared light source is incident from the imaging surface, propagates through the finger authentication prism, is reflected by the finger placed on the finger installation surface, and then is totally reflected by the reflecting surface and is then imaged.
  • the reflecting surface is formed at a predetermined angle so as to reach.
  • the imaging device is disposed in the vicinity of the imaging surface of the finger authentication prism, and the irradiation light from the visible light source and / or the infrared light source is reflected by the finger on the finger installation surface and directly reaches the imaging surface. Imaging is performed based on the reflected light that has passed through and the reflected light that has passed through the second optical path through which the irradiated light reaches the imaging surface from the finger installation surface through the reflecting surface.
  • a finger installation surface on which a finger to be authenticated is placed, an imaging surface disposed opposite to and parallel to the finger installation surface, and a predetermined angle with respect to the finger installation surface and the imaging surface
  • the first reflecting surface directly reaches the imaging surface after the visible light and / or infrared light is irradiated on the imaging surface, propagates through the finger authentication prism and is reflected by the finger placed on the finger installation surface. It is formed at a predetermined angle so as to secure the optical path and the second optical path that is totally reflected by the reflecting surface from the finger installation surface and reaches the imaging surface.
  • a finger installation surface on which a finger to be authenticated is placed, an imaging surface disposed opposite to and parallel to the finger installation surface, and total reflection after irradiation light is reflected by the finger installation surface
  • This is a biometric authentication method using a finger authentication prism having a finger installation surface and a reflective surface arranged at a predetermined angle with respect to the image pickup surface so as to reach the image pickup surface.
  • the imaging surface is irradiated with visible light and / or infrared light
  • the reflected light from the finger placed on the finger installation surface directly reaches the imaging surface and the finger installation surface.
  • the light is branched to a second optical path that reaches the imaging surface via the reflecting surface.
  • a first image is taken based on the reflected light corresponding to the part in the fingertip direction from the distal interphalangeal joint of the finger.
  • a second image is captured based on the reflected light corresponding to the portion in the root direction of the finger from the joint between the distal interphalangeal joints of the finger among the reflected light that has passed through the first optical path and the second optical path.
  • biometric authentication device and the biometric authentication method of the present invention it is possible to simultaneously acquire a high-contrast image, a blood vessel pattern image of a finger, and a natural image of a visible finger with a single imaging device. it can.
  • FIG. 1 shows the configuration of a side-view trapezoidal finger authentication prism 1 used in a biometric authentication apparatus according to an embodiment of the present invention.
  • reference numeral 10 indicates a finger installation surface on which a finger is installed
  • reference numeral 11 indicates an imaging surface on which an imaging device such as a camera is arranged.
  • the imaging surface 11 is formed in parallel with the finger installation surface 10.
  • Reference numeral 12 denotes a reflection surface
  • reference numeral 13 denotes an opposing surface.
  • the reflective surface 12 is inclined at a predetermined angle with respect to the finger placement surface 10 and the imaging surface 11, and the surface 13 facing the reflective surface 12 is perpendicular to the finger placement surface 10 and the imaging surface 11.
  • the cross-sectional view taken along the line XY as viewed from the reflecting surface 12 has a rectangular shape.
  • FIG. 2 is a plan view of the finger authentication prism 1 as viewed from the finger installation surface 10.
  • the finger installation surface 10 and the reflection surface 12 have a rectangular shape in plan view, and the finger installation surface 10 has a rectangular shape with the longitudinal direction of the finger 2 as the long side. For this reason, the finger 2 is placed so that its longitudinal direction is along the longitudinal direction of the finger installation surface 10.
  • the reflection surface 12 totally reflects light in the finger authentication prism 1 on the finger installation surface 10 in an optical path that reaches the finger installation surface 10 from the imaging surface 11 via the reflection surface 12 when the imaging surface 11 is irradiated with light. It is installed at such an angle.
  • the light incident on the reflection surface 12 from the finger installation surface 10 through the air layer to the inside of the finger authentication prism 1 is reflected on the reflection surface 12 due to the difference between the refractive index of the air layer and the refractive index of the finger authentication prism 1 itself.
  • the light that does not reach and is reflected by the finger installation surface 10 is installed at an angle at which it is totally reflected toward the imaging surface 11.
  • the biometric authentication target is the finger 2
  • the present invention is not limited to this.
  • the present invention can also be applied to palm palm pattern authentication.
  • a visible light source 3 and an infrared light source 4 are arranged below the finger authentication prism 1, and the irradiation light is reflected by the finger 2 placed on the finger installation surface 10. It is assumed that the imaged light is imaged by the imaging device 5 installed below the imaging surface 11.
  • 4 to 6 are cross-sectional views of the biometric authentication device viewed from the front end side (or the front direction) of the finger 2 placed on the finger authentication prism 1, and FIG. It is sectional drawing seen from the longitudinal direction (or horizontal direction).
  • the trough portion means a distal interphalangeal joint of the finger 2 that is not in contact with the finger installation surface 10 (including a portion in the direction from the first joint of the finger to the root of the finger).
  • the refractive index of the light reflected by the ridge portion of the finger 2 is that of the finger authentication prism 1 (ie, glass). It is almost the same as the refractive index. Therefore, the light reflected by the ridge portion of the finger 2 can be handled in the same manner as the light reflected by the finger installation surface 10. That is, since the light reflected by the ridge portion of the finger 2 is radiated in all directions within the finger authentication prism 1, it can reach all the regions below the finger installation surface 10.
  • the valley portion of the finger 2 is not in contact with the finger placement surface 10, and an air layer is formed between the valley portion of the finger 2 and the finger placement surface 10. Therefore, the reflected light of the valley line part of the finger 2 is transmitted through the finger installation surface 10 through the air layer.
  • the refractive index of air is “1.0”
  • the refractive index of glass is “1.3” to “1.5”
  • the refractive index of moisture and skin is “1.3” to “1.4”. Due to the difference in refractive index, the reflected light of the valley portion of the finger 2 undergoes a refraction phenomenon different from the reflected light of the ridge portion of the finger 2.
  • the reflected light of the valley portion of the finger 2 is not radiated in all directions in the finger authentication prism 1, and the reflected light does not reach a predetermined range in the finger authentication prism 1.
  • the reflection surface 12 is installed at an angle at which the light in the finger authentication prism 1 is totally reflected by the finger installation surface 10 in the optical path from the imaging surface 11 through the reflection surface 12 to the finger installation surface 10.
  • the reflecting surface 12 is a range in which the light that has passed through the finger placement surface 10 from the air layer and entered the finger authentication prism 1 does not reach, and the light reflected by the finger placement surface 10 is the imaging surface 11. It is installed at an angle that totally reflects toward the.
  • the light reflected by the ridge portion of the finger 2 is radiated in all directions in the finger authentication prism 1 to all regions below the finger installation surface 10. To reach. Therefore, as shown in FIG. 5, there is an optical path that reaches the imaging surface 11 by being reflected by the reflecting surface 12 together with an optical path that directly reaches the imaging surface 11.
  • the imaging device 5 captures two types of images transmitted through the imaging surface 11 in order to capture the light transmitted through the imaging surface 11.
  • the first image is generated by an optical path through which reflected light from the ridge portion of the finger 2 reaches the imaging surface 11 from the finger installation surface 10 through the reflection surface 12. Since the first image is generated only by the reflected light of the ridge portion of the finger 2, a fingerprint image (hereinafter referred to as a high-contrast image and a high contrast image) where the valley portion of the finger 2 is dark and the ridge portion of the finger 2 is bright. Called).
  • the second image is generated by an optical path that directly reaches the imaging surface 11 among the reflected light reflected by the valley and ridge portions of the finger 2 placed on the finger installation surface 10.
  • the image captured by the imaging device 5 is a natural image of the finger 2 (hereinafter referred to as a natural image). Called).
  • a natural image By using the finger authentication prism 1 as described above for the biometric authentication device, as shown in FIG. 6, a high-contrast image and a natural image can be simultaneously captured by one imaging using one imaging device 5. .
  • the finger authentication prism 1 since it is only necessary to determine whether the fingerprint image is a fake or genuine image, it is not always necessary to acquire a wide image. Rather, it is desirable to analyze in detail with large images.
  • the natural image is generated by an optical path that directly reaches the imaging surface 11 from the finger installation surface 10, and the optical path is the shortest optical path. Therefore, it is possible to obtain a natural image large enough to detect forgery.
  • a high-contrast image is used for fingerprint collation, it is desirable to acquire a fingerprint image in a wide area so that there are many feature points.
  • the optical path for obtaining a high-contrast image reaches the imaging surface 11 from the finger installation surface 10 through the reflection surface 12, and thus there are many feature points. It is possible to take a sufficient length to photograph a fingerprint image of such a wide area.
  • the finger authentication prism 1 As described above, by using the finger authentication prism 1 according to the present embodiment, a high-contrast image and a natural image can be simultaneously photographed by the imaging device 5 once.
  • the visible light source 3 for fingerprint imaging but also an infrared light source 4 for imaging a finger blood vessel pattern is used.
  • the image for fingerprint collation is mainly an image of the fingerprint imprinted part in the fingertip direction from the distal interphalangeal joint (first joint) of the finger.
  • the visible light source 3 is suitable for taking a fingerprint collation image.
  • images for blood vessel pattern matching are images of the root direction of the finger from the distal interphalangeal joint (first joint), and are mainly close to the distal interphalangeal joint (first joint) of the finger. This corresponds to the part up to the interphalangeal joint (second joint).
  • An infrared light source 4 is suitable for capturing a blood vessel pattern matching image.
  • the image in the fingertip direction from the distal interphalangeal joint (first joint) of the finger is used for fingerprint collation and confirmation of fingerprint forgery.
  • the finger placement surface An image in the fingertip direction from the distal interphalangeal joint (first joint) of the finger among the reflected light of the optical path that reaches the imaging surface 11 from 10 through the reflective surface 12 and the reflected light of the optical path that directly reaches the imaging surface 11
  • the reflected light corresponding to is taken after removing the infrared light component.
  • an infrared light cut filter 6 is installed to remove the infrared light component from the reflected light.
  • the finger placement surface Among the reflected light of the optical path that reaches the imaging surface 11 from 10 through the reflective surface 12 and the reflected light of the optical path that directly reaches the imaging surface 11, the finger base direction from the distal interphalangeal joint (first joint) of the finger The reflected light corresponding to the side image is taken after removing the visible light component. Specifically, as shown in FIG.
  • the imaging surface 11 corresponding to a portion on the finger base direction side with the distal interphalangeal joint (first joint) of the finger as the center of the angle of view of the imaging device 5.
  • the far-infrared light transmission visible light cut filter 7 for removing the visible light component from the reflected light is installed at the position.
  • FIG. 8 shows an example of a finger image taken by the biometric authentication apparatus according to the embodiment of the present invention.
  • an image of a blood vessel pattern in the direction from the distal interphalangeal joint (first joint) to the root of the finger can be acquired by one imaging device 5 by one imaging.
  • the infrared light cut filter 6 and the infrared light transmission visible light cut filter 7 are provided as means for removing the infrared light component or the visible light component from the reflected light.
  • the imaging device 5 has an imaging element sensitive to only visible light or a distal phalanx of the finger in order to receive reflected light corresponding to an image in the fingertip direction from the distal interphalangeal joint (first joint) of the finger.
  • an imaging element having sensitivity only to infrared light may be used. Even if two types of imaging elements are provided in the imaging device 5, it is possible to take an image similar to that provided with two types of filters.
  • the distal interphalangeal joint ( The infrared light component may be removed from the image in the fingertip direction from the first joint), and the visible light component may be removed from the image in the finger base direction from the distal interphalangeal joint (first joint).
  • the contrast of the high contrast image in the fingertip direction from the distal interphalangeal joint (first joint) of the finger May be further increased.
  • the reflective surface 12 may be mirror coated to increase the reflectance.
  • the imaging device 5 is disposed below the imaging surface 11 of the finger authentication prism 1, but the present invention is not limited to this.
  • the finger authentication prism 1 of the biometric authentication device is arranged in the vertical direction.
  • the finger authentication prism 1 is arranged by being rotated 90 degrees. In this case, you may install the imaging device 5 in the position (for example, position of the horizontal direction of the imaging surface 11) which can image
  • FIG. 9 shows a biometric authentication apparatus according to a modification of the present embodiment.
  • a mirror 20 is arranged in the vicinity of the imaging surface 11 of the finger authentication prism 1 arranged in a direction rotated 90 degrees with respect to the imaging device 5.
  • the reflected light of the finger 2 placed on the finger installation surface 10 of the finger authentication prism 1 passes through the imaging surface 11 and is incident on the mirror 20 that is rotated 90 degrees and reflected.
  • the imaging device 5 is arranged so that an image taken on the mirror 20 can be taken.
  • the size of the biometric authentication device in the depth direction can be reduced.
  • FIG. 10 is a configuration diagram of the fingerprint authentication device.
  • FIG. 10 shows a finger authentication prism 1 installed in the longitudinal direction of the finger and a finger authentication prism 1 installed in the fingertip direction of the finger.
  • the fingerprint authentication device includes an image processing unit 30, a verification unit 31, and a display unit 32 in addition to the biometric authentication device described above.
  • the finger authentication prism 1 is arranged such that the finger installation surface 10 is arranged on the upper side and the longitudinal direction of the finger installation surface 10 coincides with the longitudinal direction of the finger 2.
  • a finger placement unit 33 is provided so as not to be performed.
  • the visible light source 3 and the infrared light source 4 are disposed below the finger authentication prism 1.
  • a white light bulb or an LED can be used as the visible light source 3.
  • the infrared light source 4 a near-infrared light source having a wavelength of 700 nm to 1000 nm that absorbs oxyhemoglobin in blood well and has low sensitivity to biological pigments can be used.
  • the imaging device 5 is installed on the imaging surface 11 side of the finger authentication prism 1.
  • the imaging device 5 is composed of an imaging device having sensitivity to visible light and near infrared light, and converts the light into a digital signal and outputs it.
  • An image sensor composed of a CCD element or a CMOS can be used as the imaging element.
  • the infrared light component is removed from the reflected light at the position of the imaging surface 11 corresponding to the angle of view on the fingertip direction side with the distal interphalangeal joint (first joint) of the finger as the center of the angle of view of the imaging device 5.
  • An infrared light cut filter 6 is installed. Further, the visible light component from the reflected light at the position of the imaging surface 11 corresponding to the angle of view on the finger base direction side with the distal interphalangeal joint (first joint) of the finger as the center of the angle of view of the imaging device 5.
  • Infrared light transmission visible light cut filter 7 is installed.
  • the image processing unit 30 converts an image photographed by the imaging device 5 into a predetermined format and separates it into a high contrast image, a blood vessel pattern image, and a natural image.
  • the high contrast image and the blood vessel pattern image are output to the collation unit 6, and the natural image is output to the display unit 7. Since the finger authentication prism 1 generates a trapezoidal distortion similar to the conventional triangular prism, the image processing unit 30 also corrects the trapezoidal distortion for a high contrast image.
  • the collation unit 31 inputs the high contrast image and the blood vessel pattern image from the image processing unit 30 and performs fingerprint collation.
  • a known verification method can be used in the fingerprint authentication device.
  • the display unit 32 receives and displays a natural image from the image processing unit 30. In this way, a criminal act that impersonates another person by using a finger forged with a resin such as silicon or pasting a semi-transparent fingerprint forged film with irregularities on the tip of the finger is displayed. The determination can be made based on 32 display images.
  • An individual finger 2 for biometric authentication is placed on the finger installation surface 10 of the finger authentication prism 1.
  • visible light and infrared light are emitted from the visible light source 3 and the infrared light source 4 to the finger 2 through the imaging surface 11.
  • Visible light and infrared light emitted from the visible light source 3 and the infrared light source 4 are reflected by the valley and ridge portions of the finger 2 placed on the finger installation surface 10 of the finger authentication prism 1.
  • the refractive index of air is “1.0”
  • the refractive index of glass is “1.3” to “1.5”
  • the refractive index of moisture and skin is “1.3” to “1.4”. is there. Due to the difference in the refractive index of the light, the reflected light of the valley portion of the finger 2 that enters the finger authentication prism 1 through the air layer cannot reach the reflecting surface 12. Only the reflected light coming directly from the finger placement surface 10 reaches the imaging surface 11.
  • the reflected light of the ridge portion of the finger 2 spreads in all directions in the finger authentication prism 1 and travels toward the reflecting surface 12 and the imaging surface 11.
  • the reflected light of the ridge portion of the finger 2 facing the reflecting surface 12 is totally reflected and travels toward the imaging surface 11. That is, the reflected light of the ridge portion of the finger 2 propagates in the optical path from the finger installation surface 10 through the reflection surface 12 to the imaging surface 11.
  • the reflected light that has passed through the imaging surface 11 is imaged, but the reflected light corresponding to the part in the fingertip direction from the distal interphalangeal joint (first joint) of the finger is an infrared light cut filter. 6 to receive light.
  • reflected light corresponding to a portion in the finger base direction from the distal interphalangeal joint (first joint) of the finger is received via the infrared light transmitting visible light cut filter 7.
  • the imaging device 5 captures three types of images. That is, a high-contrast image of a part from the distal interphalangeal joint (first joint) to the fingertip direction, a natural image of a part of the finger from the distal interphalangeal joint (first joint) to the fingertip, FIG. 6 is a blood vessel pattern image of a portion in the direction from the distal interphalangeal joint (first joint) to the root of the finger.
  • FIG. 11 shows an example of an image taken by the imaging device 5 of the fingerprint authentication device.
  • the upper left image is a high-contrast image corresponding to the fingerprint part of the finger
  • the lower left image is a natural image including the fingerprint part
  • the lower right image is the distal finger of the finger. It is a defect pattern image of the site
  • the upper right image is a high-contrast image of a portion of the finger from the distal interphalangeal joint (first joint) to the base of the finger, but the finger placement unit 33 is placed on the finger placement surface 10, so Since the part of the finger from the distal interphalangeal joint (first joint) to the root direction of the finger is not in contact with the finger installation surface 10, it is not photographed by the imaging device 5 like the valley portion of the finger.
  • the image processing unit 30 separates the image acquired from the imaging device 5 into a high-contrast image, a blood vessel pattern image, and a natural image, and outputs the high-contrast image and the blood vessel pattern image to the collating unit 31. 7 is output.
  • the collation unit 31 performs collation / authentication of the fingerprint and the blood vessel pattern by extracting and collating the feature points from the high contrast image and the blood vessel pattern image.
  • the biometric authentication device uses a visible natural image for determining whether or not the image is obtained using a forged fingerprint film or tape, and a fingerprint portion for verification.
  • Three types of images that is, a contrast image and a blood vessel pattern image, can be acquired by a single imaging operation using one imaging device 5.
  • a natural image having a sufficient size to detect forgery can be obtained.
  • the biometric authentication apparatus can be configured by hardware, but the biometric authentication function can also be realized by a computer program.
  • the function and operation of this embodiment can be realized by a processor that reads and executes a program stored in the memory.
  • the functions of this embodiment can also be realized by a computer program.
  • biometric authentication is performed by photographing a fingerprint or the like of a finger using a finger authentication prism, but the biometric authentication target is not limited to a finger, and an image of another part of the human body is captured.
  • the present invention is also applicable to a biometric authentication system that performs biometric authentication.

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Abstract

L'invention concerne un dispositif d'authentification biométrique utilisant un prisme d'authentification de doigt qui a une forme trapézoïdale lorsqu'il est vu sur le côté et comportant : une surface de montage de doigt sur laquelle un doigt devant être authentifié est placé ; une surface d'imagerie qui est agencée de manière à être orientée vers la surface de montage de doigt de manière parallèle ; et une surface de réflexion qui est positionnée au niveau d'un angle prescrit par rapport à la surface de montage de doigt et la surface d'imagerie de sorte que, suite à la réflexion de lumière irradiée par la surface de montage de doigt, la lumière irradiée est entièrement réfléchie et atteint la surface d'imagerie. Lorsque la surface d'imagerie du prisme d'authentification de doigt est exposée à la lumière visible et/ou lumière infrarouge, la lumière réfléchie par le doigt placé sur la surface de montage de doigt est ramifiée entre un premier trajet de lumière qui atteint la surface d'imagerie directement, et un deuxième trajet de lumière qui atteint la surface d'imagerie depuis la surface de montage de doigt par l'intermédiaire de la surface de réflexion. À partir de la lumière réfléchie qui a parcouru le premier trajet de lumière et le deuxième trajet de lumière, le dispositif d'authentification biométrique forme une première image en fonction de la lumière réfléchie correspondant à une région du doigt s'étendant depuis l'articulation interphalangienne distale dans la direction du bout du doigt, et forme une deuxième image en fonction de la lumière réfléchie correspondant à une région du doigt s'étendant depuis l'articulation interphalangienne distale dans la direction de la base du doigt.
PCT/JP2015/052839 2014-02-06 2015-02-02 Dispositif d'authentification biométrique utilisant un prisme d'authentification de doigt et procédé d'authentification biométrique WO2015119078A1 (fr)

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JP2015560972A JP6443349B2 (ja) 2014-02-06 2015-02-02 指認証プリズムを用いた生体認証装置及び生体認証方法

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JP2014021109 2014-02-06
JP2014-021109 2014-02-06

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017142700A (ja) * 2016-02-12 2017-08-17 日本電気株式会社 生体撮像装置、生体撮像方法、生体撮像プログラム、生体撮像プログラムを記憶する記憶媒体
JP2017191374A (ja) * 2016-04-11 2017-10-19 シャープ株式会社 生体判定装置、端末装置、生体判定装置の制御方法、制御プログラム
JP2020086749A (ja) * 2018-11-21 2020-06-04 日本電気株式会社 撮像装置および撮像方法
JPWO2020137129A1 (ja) * 2018-12-28 2021-10-21 株式会社ジャパンディスプレイ 検出装置
JP2022522455A (ja) * 2019-02-28 2022-04-19 維沃移動通信有限公司 光電指紋識別装置、端末及び指紋識別方法

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JP2006065400A (ja) * 2004-08-24 2006-03-09 Fujitsu Component Ltd 画像読取装置及び生体認証装置
JP2010503079A (ja) * 2006-08-30 2010-01-28 ルミダイム インコーポレイテッド ロバストな指紋取得のためのシステムおよび装置

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Publication number Priority date Publication date Assignee Title
JP2017142700A (ja) * 2016-02-12 2017-08-17 日本電気株式会社 生体撮像装置、生体撮像方法、生体撮像プログラム、生体撮像プログラムを記憶する記憶媒体
JP2017191374A (ja) * 2016-04-11 2017-10-19 シャープ株式会社 生体判定装置、端末装置、生体判定装置の制御方法、制御プログラム
JP2020086749A (ja) * 2018-11-21 2020-06-04 日本電気株式会社 撮像装置および撮像方法
JPWO2020137129A1 (ja) * 2018-12-28 2021-10-21 株式会社ジャパンディスプレイ 検出装置
JP7144814B2 (ja) 2018-12-28 2022-09-30 株式会社ジャパンディスプレイ 検出装置
US11888080B2 (en) 2018-12-28 2024-01-30 Japan Display Inc. Detection device including light sources along an outer circumference of two detection areas each of the detection areas having a specific scan direction
JP2022522455A (ja) * 2019-02-28 2022-04-19 維沃移動通信有限公司 光電指紋識別装置、端末及び指紋識別方法
JP7254949B2 (ja) 2019-02-28 2023-04-10 維沃移動通信有限公司 光電指紋識別装置、端末及び指紋識別方法

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