WO2013146759A1 - 認証装置、認証用プリズム体及び認証方法 - Google Patents
認証装置、認証用プリズム体及び認証方法 Download PDFInfo
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- WO2013146759A1 WO2013146759A1 PCT/JP2013/058733 JP2013058733W WO2013146759A1 WO 2013146759 A1 WO2013146759 A1 WO 2013146759A1 JP 2013058733 W JP2013058733 W JP 2013058733W WO 2013146759 A1 WO2013146759 A1 WO 2013146759A1
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- Prior art keywords
- living body
- light
- light source
- imaging
- visible light
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- 238000003384 imaging method Methods 0.000 claims abstract description 164
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- 230000005540 biological transmission Effects 0.000 claims description 20
- 238000012790 confirmation Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 21
- 210000004204 blood vessel Anatomy 0.000 description 20
- 238000002834 transmittance Methods 0.000 description 5
- 239000010410 layer Substances 0.000 description 4
- 210000003462 vein Anatomy 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
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- 239000000428 dust Substances 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 206010033675 panniculitis Diseases 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 210000004304 subcutaneous tissue Anatomy 0.000 description 2
- 210000001519 tissue Anatomy 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
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- 239000011521 glass Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 229910052710 silicon Inorganic materials 0.000 description 1
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Classifications
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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
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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
-
- 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
-
- 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 an authentication device, an authentication prism body, and an authentication method.
- Patent Document 1 the color of an image obtained by reflecting the visible light of the counterfeit determination illumination to the subject does not match the color of the finger image that is obtained in the same manner and registered in advance in the data recording unit.
- the device collates the feature points obtained from the transmitted light by irradiating the finger with near-infrared light of personal identification illumination and the feature points of the finger image that are obtained in the same way and registered in advance in the data recording means.
- Personal identification is a method for determining a subject as a fake finger.
- Patent Document 2 white light and infrared light are selectively switched, white light is reflected on the surface layer of a finger to obtain a fingerprint image, and infrared light is incident on the inside of the finger to scatter and vein image. And a device for authenticating a specific person by comparing each with a registered fingerprint image and a registered vein image.
- Patent Document 3 discloses an apparatus for judging a forged finger by comparing a fingerprint image with high sensitivity and a fingerprint image with low sensitivity.
- Patent Document 4 describes an apparatus that determines whether a finger vein image is a living body based on a difference between finger vein images captured with transmitted light having different wavelengths.
- Patent Document 5 describes a method of using a prism as a fingerprint authentication scanner to enhance contrast.
- Patent Documents 1 to 4 described above can detect forgery of the finger with high accuracy by comparing the reflected light image and the transmitted light image obtained from the same finger.
- Patent Document 5 can obtain an image having a high contrast necessary for collation of fingerprints. However, since only an image of a portion in contact with the prism can be obtained, the technique of Patent Documents 1 to 4 described above is used. Cannot be detected with high accuracy.
- the present invention has been invented in view of the above problems, and its purpose is to simultaneously capture a high-contrast image having sufficient contrast for matching a living body and a natural image of a living body close to visual observation simultaneously.
- An object of the present invention is to provide an authentication device, an authentication prism body and an authentication method that can be acquired by the device.
- the present invention includes a prism body, an imaging unit, and a visible light source that irradiates a living body with visible light, and the prism body is in contact with the living body, in contact with the living body contact surface, and A reflecting surface that totally reflects light from the concave portion and light from the convex portion of the living body, and the living body contact surface, and is in contact with the reflecting surface so that the light from the living body concave portion does not reach the reflecting surface.
- An imaging surface provided at an angle at which the totally reflected light and the light from the convex portion of the living body can be transmitted; and the imaging unit transmits the light from the convex portion of the living body through the imaging surface
- the authentication apparatus which images the light from the recessed part of the said biological body and the light from the convex part of the said biological body reflected by the said reflective surface.
- the present invention relates to a prism body for biometric authentication, which is a biometric contact surface that comes into contact with a living body, is in contact with the biometric contact surface, and totally reflects light from a concave portion of the living body and light from a convex portion of the living body.
- the present invention includes a living body contact surface that comes into contact with a living body, a reflecting surface that is in contact with the living body contact surface, totally reflects light from the concave portion of the living body and light from the convex portion of the living body, and the living body contact surface.
- the imaging surface provided at an angle at which the light from the living body concave portion does not reach and the light totally reflected by the reflecting surface 12 and the light from the convex portion of the living body can be transmitted
- the living body is brought into contact with the living body contact surface of the prism body, and the living body is irradiated with visible light and transmitted through the imaging surface.
- the light from the convex portion of the living body is reflected by the reflecting surface.
- the present invention it is possible to simultaneously acquire a high-contrast image having sufficient contrast for collating a living body and a natural image of a living body close to visual observation with one imaging device.
- FIG. 1 is a diagram showing a configuration of a prism 1 according to the present invention.
- FIG. 2 is a view for explaining the prism 1 according to the present invention.
- FIG. 3 is a view for explaining the prism 1 according to the present invention.
- FIG. 4 is a view for explaining the prism 1 according to the present invention.
- FIG. 5 is a view for explaining the prism 1 according to the present invention.
- FIG. 6 is a configuration diagram of the fingerprint authentication device according to the first embodiment.
- FIG. 7 is a diagram illustrating an example of a high-contrast image and a natural image captured by the imaging device 4.
- FIG. 8 is a configuration diagram of the authentication apparatus according to the second embodiment.
- FIG. 9 is a configuration diagram of an authentication apparatus according to the third embodiment.
- FIG. 10 is a configuration diagram of the prism 5 in the authentication device according to the fourth embodiment.
- FIG. 11 is a configuration diagram of an authentication apparatus according to the fourth embodiment.
- FIG. 12 is a configuration diagram of an authentication apparatus according to the fifth embodiment.
- FIG. 13 is a configuration diagram of an authentication apparatus according to the sixth embodiment.
- FIG. 14 is a configuration diagram of an authentication apparatus according to the seventh embodiment.
- FIG. 15 is a configuration diagram of an authentication apparatus according to the eighth embodiment.
- FIG. 1 is a diagram showing a configuration of a prism 1 according to the present invention.
- 10 is a living body contact surface that contacts a living body (for example, a finger)
- 11 is an imaging surface that is provided facing the living body contact surface 10 and is a surface on which an imaging device such as a camera is disposed.
- 12 is a reflecting surface 12 provided in contact with the living body contact surface 10 and the imaging surface 11.
- the living body is assumed to be a finger, but is not limited thereto.
- the visible light source 3 is installed on the nail upper side of the fingertip of the finger 2 so that the irradiation light enters the living body from the nail side of the fingertip 2 and proceeds while scattering the light.
- the wavelength of the irradiation light of the visible light source 3 is preferably a wavelength having a high transmittance with respect to the living body.
- the light of the visible light source 3 that has entered the living body from the finger 2 reaches the living body contact surface 10 while being absorbed and scattered by tissues such as cells, and the living body convex portion (fingerprint ridge portion) and biological concave portion (fingerprint valley line). Part) is emitted as scattered light.
- the living body is an excellent light scatterer, the scattered light is emitted in almost all directions of 180 degrees. Therefore, the scattered light emitted from the living body convex portion (the fingerprint ridge) can reach all the regions below the living body contact surface 10.
- the scattered light emitted from the concave portion of the living body enters the prism 1 through the air layer.
- the refractive index of air is 1.0
- the refractive index of glass is 1.3 to 1.5
- the moisture and skin are 1.3 to 1.4. Reflection and refraction phenomenon different from the light from the above occurs, and the light from the living body convex part is observed from all directions, but the light from the living body concave part is observed only at a certain angle.
- the reflecting surface 12 is provided so as to have an angle equal to or greater than the critical angle with respect to the light incident on the prism through the air layer from the living body recess, and totally reflects the light from the living body recess. . At this time, a part of the light emitted from the living body convex portion is also totally reflected by the reflecting surface 12.
- the imaging surface 11 can transmit the light totally reflected by the reflecting surface 12 (light from the biological convex portion and the biological concave portion) at a position where the light from the biological concave portion cannot be directly observed. Provide at an angle.
- the light from the biological concave portion does not reach the upper portion of the imaging surface 11, and only the light from the biological convex portion is transmitted to the imaging surface 11.
- a bio-concave part is dark and a bio-convex part is bright and a high-contrast image for biometric authentication (hereinafter referred to as a high-contrast image) is shown.
- both the light incident from the living body concave portion and the light incident from the biological convex portion, which is totally reflected by the reflecting surface 12 are transmitted through the lower portion of the imaging surface 11, and the light of the biological concave portion and the biological convexity are transmitted.
- a natural image (natural image) consisting of the light of the part is reflected.
- the surface 13 has a contact area between the living body and the living body contact surface 10 so that a high-contrast image and a natural image are displayed on the imaging surface 11 and an image having a size necessary for biometric authentication is obtained. It is provided at an angle that can be secured sufficiently.
- the high-contrast image and the natural image are captured on the imaging surface 11 at a time, so that the high-contrast image and the natural image can be captured with a single shooting.
- the reflecting surface 12 is provided at an angle at which both the light incident from the living body concave portion and the light incident from the biological convex portion are totally reflected, the light is reflected from the reflecting surface 12 to the imaging surface 11. Therefore, it is not necessary to provide a reflector such as a mirror coat, and the cost of the prism main body can be reduced.
- FIG. 6 is a configuration diagram of the fingerprint authentication device according to the first embodiment.
- the above-described prism 1 is provided at a position where the biological contact surface 10 is provided on the upper side of the device and becomes a fingerprint placement surface of the finger 2.
- the visible light source 3 is installed on the nail upper side of the fingertip of the finger 2 so that the irradiated light enters the living body from the nail side of the fingertip 2 and travels while being scattered.
- the wavelength of the irradiation light of the visible light source 3 should be a wavelength having a high transmittance with respect to the living body.
- a relatively high transmittance is obtained in the wavelength range of 0.6 ⁇ m to 1.4 ⁇ m. It is effective as a light source wavelength of the present invention.
- the type of visible light source 3 is not particularly limited, but an LED may be used because it is inexpensive and has high luminance.
- an imaging device that captures a high-contrast image with clear ridges and valleys of the fingerprint and a natural image of the fingerprint portion of the finger via the imaging surface 11. 4 is provided.
- the imaging device 4 converts an input image into a digital signal and outputs it, and an image sensor made up of a CCD, a CMOS, or the like can be used.
- the finger 2 is loaded on the living body contact surface 10 of the prism 1 which is a loading surface.
- the visible light source 3 emits light with the fingerprint portion of the finger 2 placed on the living body contact surface 10 of the prism 1, and the finger 2 is irradiated with photographing light.
- the light of the visible light source 3 that has entered the living body from the finger 2 reaches the living body contact surface 10 while being absorbed and scattered by tissues such as cells, and is emitted as scattered light from the ridges and valleys of the fingerprint. .
- the scattered light emitted from the ridge portion of the fingerprint reaches all regions below the biological contact surface 10, passes through the imaging surface 11, and is reflected by the reflecting surface 12 to the imaging surface 11.
- the light emitted from the valley portion of the fingerprint enters the prism 1 through the air layer, and is reflected by the reflecting surface 12 to the imaging surface 11 together with the scattered light emitted from the ridge portion of the fingerprint.
- the imaging device 4 captures a high-contrast image and a natural image of the fingerprint portion of the finger 2 by one-time shooting with the light transmitted through the imaging surface 11 of the prism 1.
- An example of an image captured by the imaging device 4 is shown in FIG. As can be seen from FIG. 7, it can be seen that a high-contrast image of the fingerprint region and a natural image of the finger 2 including the fingerprint region are captured.
- the captured image is displayed on a display device and visually confirmed, or by using a predetermined collation algorithm, it is determined whether a forged fingerprint film or tape is used for collation. be able to.
- the authentication device has a high contrast used for comparing a fingerprint with a natural image close to the eye for determining whether a forged fingerprint film or tape is used.
- An image can be obtained by one finger photographing with a single imaging device.
- FIG. 8 is a configuration diagram of the authentication apparatus according to the second embodiment. As shown in FIG. 8, in addition to the infrared light source 20 of infrared light above the finger 2, an imaging device 21 for imaging a blood vessel for imaging the blood vessel pattern of the finger is provided at a position below the finger 2.
- the visible light source 3 which is a white light source and the infrared light source 20 of infrared light are switched over in time and photographed.
- the visible light source 3 that is a white light source is first emitted, and a natural image and a high-contrast image are captured by the imaging device 4.
- the infrared light source 20 of infrared light is emitted, and the blood vessel pattern of the finger is imaged by the imaging device 21.
- an infrared light source 20 of infrared light is provided, and a finger blood vessel pattern by infrared light, a high contrast image, and a natural image are provided.
- An example of simultaneous imaging will be described.
- FIG. 9 is a configuration diagram of an authentication apparatus according to the third embodiment.
- an imaging device 21 for imaging a blood vessel that images the blood vessel pattern of the finger is provided at a position below the finger 2.
- the visible light cut infrared light passing filter 30 that cuts visible light and transmits infrared light out of the transmitted light is placed between the lower part of the finger 2 and the imaging device 21. Provide between. Thereby, the transmitted light from which the visible light is cut is incident on the imaging device 21. Further, an infrared light cut filter 31 is provided in front of the imaging device 4. Thereby, the transmitted light from which the infrared light is cut is incident on the imaging device 4.
- the visible light source 3 that is the source of visible light and the infrared light source 20 that is the infrared light are caused to emit light at the same time, and the imaging device 4 captures a natural image and a high-contrast image.
- the blood vessel pattern of the finger can be imaged, and a natural image, a high-contrast image, and an image of the blood vessel pattern of the finger can be obtained simultaneously by one shooting.
- the infrared light cut filter 31 provided at the lower part of the finger 2 eliminates the intrusion of foreign matter such as dust and dust into the authentication device, and the authentication device can be easily maintained.
- the shape of the prism is different from that of the prism 1 used in the above-described embodiment.
- FIG. 10 is a configuration diagram of the prism 5 in the authentication device according to the fourth embodiment.
- the prism 5 is different from the prism 1 in that the first side surface 15 and the second side surface 16 of the prism 5 are less than 90 degrees with respect to the living body contact surface 10. It is formed as follows. That is, the taper is provided toward the imaging surface 11 facing the living body contact surface 10. The imaging surface 11 and the reflection surface 12 are provided at the same angle as the prism 1.
- a reflected light source can be used instead of a transmissive light source, and the light source position can be provided below the prism 5.
- FIG. 11 is a configuration diagram of an authentication apparatus according to the fourth embodiment.
- a visible light source 40 for irradiating light onto the first side surface 15 and the second side surface 16 of the prism 5 is provided.
- the wavelength of the irradiation light of the visible light source 40 should be a wavelength having a high transmittance with respect to the living body.
- a relatively high transmittance is obtained in the wavelength range of 0.6 ⁇ m to 1.4 ⁇ m. This is effective as the light source wavelength of the present invention.
- the type of the visible light source 40 is not particularly limited, but the LED may be used because it is inexpensive and has high luminance.
- the finger 2 is loaded on the living body contact surface 10 of the prism 1 which is a loading surface.
- the visible light source 40 emits light and the finger 2 is irradiated with photographing light.
- the irradiated light travels in the prism 5, passes through the biological contact surface 10, and is reflected by the fingerprint ridge and the fingerprint valley.
- the scattered light emitted from the ridge portion of the fingerprint reaches all areas below the living body contact surface 10 and directly reaches the imaging surface 11.
- the light emitted from the valley portion of the fingerprint enters the prism 5 through the air layer, and is reflected by the reflecting surface 12 to the imaging surface 11 together with the scattered light emitted from the ridge portion of the fingerprint.
- the imaging device 4 captures a high-contrast image and a natural image of the fingerprint portion of the finger 2 by one-time shooting with the light transmitted through the imaging surface 11 of the prism 5.
- the captured image is displayed on a display device and visually confirmed, or by using a predetermined collation algorithm, it is determined whether a forged fingerprint film or tape is used for collation. be able to.
- the authentication device of the fourth embodiment has the same effect as the authentication device of the first embodiment, but the light source for irradiating the living body can be installed at the lower part of the prism, so Compared with installing a light source, the authentication apparatus can be further downsized.
- FIG. 12 is a configuration diagram of an authentication apparatus according to the fifth embodiment. As shown in FIG. 12, an infrared light source 41 for infrared light and a blood vessel imaging device 21 for imaging a finger blood vessel pattern are provided at a position below the finger 2.
- the visible light source 3 which is a white light source and the infrared light source 41 of infrared light are switched over in time and photographed.
- the visible light source 3 that is a white light source is first emitted, and a natural image and a high-contrast image are captured by the imaging device 4.
- the infrared light source 41 of infrared light is emitted, and the blood vessel pattern of the finger is imaged by the imaging device 21.
- the fifth embodiment in addition to the effects of the fourth embodiment, it is possible to observe pulsation due to blood flow and changes in the image due to subcutaneous tissue. Can do.
- an infrared light source is provided, and the blood vessel pattern of the finger, the high contrast image, and the natural image are reflected by the light scattered and reflected inside the finger.
- An example of simultaneous imaging will be described.
- FIG. 13 is a configuration diagram of an authentication apparatus according to the sixth embodiment.
- an infrared light source 41 for infrared light and an imaging device 21 for blood vessel imaging for imaging a blood vessel pattern of a finger are provided at a position below the finger 2.
- a visible light cut infrared light transmission filter 42 is provided above the infrared light source 41 and the imaging device 21.
- the visible light cut infrared light transmission filter 42 is installed in the vicinity of the imaging device 21 because the light source is reflected.
- an infrared light cut filter 43 is provided in front of the imaging device 4. Thereby, the transmitted light from which the infrared light is cut is incident on the imaging device 4.
- the visible light source 40 that is the visible light source and the infrared light source 41 that is the infrared light are caused to emit light at the same time, and the imaging device 4 captures a natural image and a high-contrast image.
- the blood vessel pattern of the finger can be imaged, and a natural image, a high-contrast image, and an image of the blood vessel pattern of the finger can be obtained simultaneously by one shooting.
- the seventh embodiment is different from the fourth embodiment in that a visible light source 3 is also arranged on the upper part of the finger 2 in addition to the fourth embodiment.
- FIG. 14 is a configuration diagram of an authentication apparatus according to the seventh embodiment.
- the visible light source 3 is disposed above the finger 2, and the visible light source 40 is disposed below the first side surface 15 and the second side surface 16. Yes. Then, the visible light source 3 and the visible light source 40 are caused to emit light while being temporally shifted, and the finger 2 is imaged by the imaging device 4 with each light.
- an image reflecting the structure in the finger 2 is obtained by the transmitted light from the visible light source 3, and an image centered on the surface of the finger 2 is obtained by the reflected light from the visible light source 40. It is done.
- highly accurate authentication can be performed. For example, when a sticker is attached to a finger, the transmitted light has a double image, and counterfeiting can be detected.
- the eighth embodiment is a combination of the above-described embodiments, in which a plurality of visible light sources and a plurality of infrared light sources are provided to perform more accurate authentication.
- FIG. 15 is a configuration diagram of an authentication apparatus according to the eighth embodiment.
- a visible light source 3 and an infrared light source 20 for infrared light are provided on the top of the finger 2.
- a visible light source 40 that irradiates light to the first side surface 15 and the second side surface 16 is provided.
- an infrared light source 41 for infrared light and an imaging device 21 for imaging a blood vessel for imaging a blood vessel pattern of the finger are provided at a position below the finger 2.
- a visible light cut infrared light transmission filter 42 is provided above the infrared light source 41 and the imaging device 21. The visible light cut infrared light transmission filter 42 is installed in the vicinity of the imaging device 21 because the light source is reflected.
- an infrared light cut filter 43 is provided in front of the imaging device 4. Thereby, the transmitted light from which the infrared light is cut is incident on the imaging device 4.
- the visible light source 3 and the infrared light source 20 that are transmitted light are simultaneously emitted, and the finger 2 is imaged by the imaging device 4 and the imaging device 21 with each light.
- the visible light source 40 and the infrared light source 41 that are reflected light are simultaneously emitted, and the finger 2 is imaged by the imaging device 4 and the imaging device 21 with each light.
- the prism body has a prism body, an imaging part, and a visible light source which irradiates visible light to a living body
- the prism body is A biological contact surface in contact with the living body;
- a reflecting surface that is in contact with the living body contact surface and totally reflects light from the concave portion of the living body and light from the convex portion of the living body;
- the imaging unit is an authentication that images the light from the convex portion of the living body that is transmitted through the imaging surface, the light from the concave portion of the biological body that is reflected by the reflecting surface, and the light from the convex portion of the biological body. apparatus.
- the visible light source is disposed on the living body,
- the first side surface and the second side surface of the prism body are formed so that an angle formed with the biological contact surface is smaller than 90 degrees. Placing the visible light source below the first side and the second side; The authentication apparatus according to appendix 1, wherein the imaging unit captures an image with reflected light of the living body of visible light from the visible light source.
- the first side surface and the second side surface of the prism body are formed so that an angle formed with the living body contact surface is smaller than 90 degrees.
- the authentication apparatus according to any one of appendix 1 to appendix 3, wherein the imaging unit captures an image using light transmitted through the living body by the first visible light source and reflected light of the living body by the second visible light source.
- An infrared light source for irradiating the living body with infrared light is disposed on the upper part of the living body, A second imaging unit that images infrared light transmitted through the living body, is disposed below the living body; Causing the visible light source and the infrared light source to emit light at different times;
- the authentication apparatus according to any one of appendix 1 to appendix 4, wherein imaging of a living body with visible light from the visible light source and imaging of a living body with infrared light from the infrared light source are performed at different times.
- An infrared light source for irradiating the infrared light is disposed on the top of the living body, A visible light transmission filter that cuts infrared light is arranged on the front surface of the imaging device, An infrared light transmission filter that cuts visible light is arranged at the bottom of the living body, A second imaging unit that images the infrared light transmitted through the living body is disposed below the infrared light transmission filter, Causing the visible light source and the infrared light source to emit light simultaneously;
- the authentication apparatus according to any one of appendix 1 to appendix 5, which simultaneously performs imaging of a living body using visible light from the visible light source and imaging of a living body using infrared light from the infrared light source.
- An infrared light source for irradiating the living body with infrared light is disposed below the living body, A second imaging unit that images infrared light transmitted through the living body, is disposed below the living body; Causing the visible light source and the infrared light source to emit light at different times;
- the authentication device according to any one of appendix 1 to appendix 6, wherein imaging of a living body using visible light from the visible light source and imaging of a living body using infrared light from the infrared light source are performed at different times.
- a visible light transmission filter that cuts infrared light is disposed on the front surface of the imaging device, An infrared light source for irradiating the infrared light is disposed below the living body, A second imaging unit that images infrared light transmitted through the living body, is disposed below the living body; An infrared light transmission filter that cuts visible light is disposed between the infrared light source and the second imaging unit and the living body, Causing the visible light source and the infrared light source to emit light simultaneously;
- the authentication apparatus according to any one of appendix 1 to appendix 7, wherein imaging of a living body using visible light from the visible light source and imaging of a living body using infrared light from the infrared light source are performed simultaneously.
- attained the said imaging surface directly is a high contrast image for biometric authentication
- a biometric authentication prism body A biological contact surface in contact with the living body; A reflecting surface that is in contact with the living body contact surface and totally reflects light from the concave portion of the living body and light from the convex portion of the living body; Opposite to the living body contact surface, in contact with the reflecting surface, the light from the living body concave portion does not reach, and the angle at which the light totally reflected by the reflecting surface 12 and the light from the convex portion of the living body can be transmitted
- a prism body for biometric authentication comprising an imaging surface provided.
- a living body contact surface that comes into contact with a living body, A reflecting surface that is in contact with the living body contact surface and totally reflects light from the concave portion of the living body and light from the convex portion of the living body; Opposite to the living body contact surface, in contact with the reflecting surface, the light from the living body concave portion does not reach, and at an angle at which the light totally reflected by the reflecting surface 12 and the light from the convex portion of the living body can be transmitted.
- a living body is brought into contact with the living body contact surface of the prism body including an imaging surface provided; Irradiating the living body with visible light, An authentication method for imaging light from the convex portion of the living body that is transmitted through the imaging surface, light from the concave portion of the biological body reflected by the reflecting surface, and light from the convex portion of the biological body.
- the first side surface and the second side surface of the prism body are formed such that an angle formed with the biological contact surface is smaller than 90 degrees. Irradiating visible light to the first side surface and the second side surface from below the first side surface and the second side surface, The authentication method according to appendix 13, wherein an image is picked up by reflected light of the living body of visible light by the visible light source.
- the first side surface and the second side surface of the prism body are formed so that an angle formed with the living body contact surface is smaller than 90 degrees.
- An infrared light source for irradiating the living body with infrared light is disposed on the upper part of the living body, A second imaging unit that images infrared light transmitted through the living body, is disposed below the living body; Causing the visible light source and the infrared light source to emit light at different times; The authentication method according to any one of appendix 13 to appendix 16, wherein imaging of a living body using visible light from the visible light source and imaging of a living body using infrared light from the infrared light source are performed at different times.
- An infrared light source for irradiating the infrared light is disposed on the living body, A visible light transmission filter that cuts infrared light is arranged on the front surface of the imaging device, An infrared light transmission filter that cuts visible light is arranged at the bottom of the living body, A second imaging unit that images the infrared light transmitted through the living body is disposed below the infrared light transmission filter, Causing the visible light source and the infrared light source to emit light simultaneously; 18.
- the authentication method according to any one of appendix 13 to appendix 17, wherein imaging of a living body using visible light from the visible light source and imaging of a living body using infrared light from the infrared light source are performed simultaneously.
- An infrared light source for irradiating the living body with infrared light is disposed below the living body, A second imaging unit that images infrared light transmitted through the living body, is disposed below the living body; Causing the visible light source and the infrared light source to emit light at different times; The authentication method according to any one of appendix 13 to appendix 18, wherein imaging of a living body using visible light from the visible light source and imaging of a living body using infrared light from the infrared light source are performed at different times.
- a visible light transmission filter that cuts infrared light is disposed on the front surface of the imaging device, An infrared light source for irradiating the infrared light is disposed below the living body, A second imaging unit that images infrared light transmitted through the living body, is disposed below the living body; An infrared light transmission filter that cuts visible light is disposed between the infrared light source and the second imaging unit and the living body, Causing the visible light source and the infrared light source to emit light simultaneously;
- the authentication method according to any one of appendix 13 to appendix 19, wherein imaging of a living body using visible light from the visible light source and imaging of a living body using infrared light from the infrared light source are performed simultaneously.
- attained the said imaging surface directly is a high contrast image for biometric authentication
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Abstract
Description
第1の実施の形態を説明する。
第2の実施の形態を説明する。
第3の実施の形態を説明する。
第4の実施の形態を説明する。
第5の実施の形態を説明する。
第6の実施の形態を説明する。
第7の実施の形態を説明する。
第8の実施の形態を説明する。
前記プリズム体は、
生体と接触する生体接触面と、
前記生体接触面に接し、前記生体の凹部からの光と前記生体の凸部からの光とを全反射する反射面と、
前記生体接触面と対向し、前記反射面と接し、前記生体凹部からの光が到達せず、反射面で全反射された光と、前記生体の凸部からの光とを透過できる角度に設けられた撮像面と
を備え、
前記撮像部は、前記撮像面を透過する、前記生体の凸部からの光と、前記反射面により反射された前記生体の凹部からの光及び前記生体の凸部からの光とを撮像する
認証装置。
前記撮像部は、前記生体内を透過する光により撮像する
付記1に記載の認証装置。
前記第1の側面及び前記第2の側面の下部に前記可視光源を配置し、
前記撮像部は、前記可視光源による可視光の前記生体の反射光により撮像する
付記1に記載の認証装置。
前記生体の上部に可視光を照射する第1の可視光源を配置し、前記第1の側面及び前記第2の側面の下部に可視光を照射する第2の可視光源を配置し、
前記撮像部は、前記第1の可視光源による前記生体内を透過する光と、前記第2の可視光源による前記生体の反射光とにより撮像する
付記1から付記3のいずれかに記載の認証装置。
前記生体を透過した赤外光を撮像する第2の撮像部を、前記生体の下部に配置し、
前記可視光源と前記赤外光源とを時間をずらして発光させ、
前記可視光源の可視光による生体の撮像と前記赤外光源の赤外光による生体の撮像とを時間をずらして行う
付記1から付記4のいずれかに記載の認証装置。
前記撮像装置の前面に赤外光カットする可視光透過フィルターを配置し、
前記生体の下部に可視光カットする赤外光透過フィルターを配置し、
前記赤外光透過フィルターの下部に、前記生体を透過した赤外光を撮像する第2の撮像部を配置し、
前記可視光源と前記赤外光源とを同時に発光させ、
前記可視光源の可視光による生体の撮像と前記赤外光源の赤外光による生体の撮像とを同時に行う
付記1から付記5のいずれかに記載の認証装置。
前記生体を透過した赤外光を撮像する第2の撮像部を、前記生体の下部に配置し、
前記可視光源と前記赤外光源とを時間をずらして発光させ、
前記可視光源の可視光による生体の撮像と前記赤外光源の赤外光による生体の撮像とを時間をずらして行う
付記1から付記6のいずれかに記載の認証装置。
前記赤外光を照射する赤外光源を前記生体の下部に配置し、
前記生体を透過した赤外光を撮像する第2の撮像部を、前記生体の下部に配置し、
前記赤外光源及び第2の撮像部と、前記生体との間に可視光カットする赤外光透過フィルターを配置し、
前記可視光源と前記赤外光源とを同時に発光させ、
前記可視光源の可視光による生体の撮像と前記赤外光源の赤外光による生体の撮像とを同時に行う
付記1から付記7のいずれかに記載の認証装置。
前記反射面により反射された前記生体の凹部からの光及び前記生体の凸部からの光を撮像した画像が偽造確認用の自然画像である
付記1から付記8のいずれかに記載の認証装置。
付記1から付記9のいずれかに記載の認証装置。
生体と接触する生体接触面と、
前記生体接触面に接し、前記生体の凹部からの光と前記生体の凸部からの光とを全反射する反射面と、
前記生体接触面と対向し、前記反射面と接し、前記生体凹部からの光が到達せず、反射面12で全反射された光と、前記生体の凸部からの光とを透過できる角度に設けられた撮像面と
を備える生体認証用のプリズム体。
付記11に記載の生体認証用のプリズム体。
前記生体接触面に接し、前記生体の凹部からの光と前記生体の凸部からの光とを全反射する反射面と、
前記生体接触面と対向し、前記反射面と接し、前記生体凹部からの光が到達せず、反射面12で全反射された光と、前記生体の凸部からの光とを透過できる角度に設けられた撮像面と
を備えるプリズム体の前記生体接触面に生体を接触させ、
前記生体に可視光を照射し、
前記撮像面を透過する、前記生体の凸部からの光と、前記反射面により反射された前記生体の凹部からの光及び前記生体の凸部からの光とを撮像する
認証方法。
前記生体内を透過する光により撮像する
付記13に記載の認証方法。
前記第1の側面及び前記第2の側面の下部から、前記第1の側面及び前記第2の側面に可視光を照射し、
前記可視光源による可視光の前記生体の反射光により撮像する
付記13に記載の認証方法。
前記生体の上部に可視光を照射する第1の可視光源を配置し、前記第1の側面及び前記第2の側面の下部に可視光を照射する第2の可視光源を配置し、
前記撮像部は、前記第1の可視光源による前記生体内を透過する光と、前記第2の可視光源による前記生体の反射光とにより撮像する
付記13から付記15のいずれかに記載の認証方法。
前記生体を透過した赤外光を撮像する第2の撮像部を、前記生体の下部に配置し、
前記可視光源と前記赤外光源とを時間をずらして発光させ、
前記可視光源の可視光による生体の撮像と前記赤外光源の赤外光による生体の撮像とを時間をずらして行う
付記13から付記16のいずれかに記載の認証方法。
前記撮像装置の前面に赤外光カットする可視光透過フィルターを配置し、
前記生体の下部に可視光カットする赤外光透過フィルターを配置し、
前記赤外光透過フィルターの下部に、前記生体を透過した赤外光を撮像する第2の撮像部を配置し、
前記可視光源と前記赤外光源とを同時に発光させ、
前記可視光源の可視光による生体の撮像と前記赤外光源の赤外光による生体の撮像とを同時に行う
付記13から付記17のいずれかに記載の認証方法。
前記生体を透過した赤外光を撮像する第2の撮像部を、前記生体の下部に配置し、
前記可視光源と前記赤外光源とを時間をずらして発光させ、
前記可視光源の可視光による生体の撮像と前記赤外光源の赤外光による生体の撮像とを時間をずらして行う
付記13から付記18のいずれかに記載の認証方法。
前記赤外光を照射する赤外光源を前記生体の下部に配置し、
前記生体を透過した赤外光を撮像する第2の撮像部を、前記生体の下部に配置し、
前記赤外光源及び第2の撮像部と、前記生体との間に可視光カットする赤外光透過フィルターを配置し、
前記可視光源と前記赤外光源とを同時に発光させ、
前記可視光源の可視光による生体の撮像と前記赤外光源の赤外光による生体の撮像とを同時に行う
付記13から付記19のいずれかに記載の認証方法。
前記反射面により反射された前記生体の凹部からの光及び前記生体の凸部からの光を撮像した画像が偽造確認用の自然画像である
付記13から付記20のいずれかに記載の認証方法。
付記13から付記21のいずれかに記載の認証方法。
2 指
3 可視光源
4 撮像装置
5 プリズム
10 生体接触面
11 撮像面
12 反射面
13 面
15 第1の側面
16 第2の側面
20 赤外光源
21 撮像装置
30 可視光カット赤外光通過フィルター
31 赤外光カットフィルター
40 可視光源
41 赤外光源
42 可視光カット赤外光透過フィルター
43 赤外光カットフィルター
Claims (15)
- プリズム体と、撮像部と、生体に可視光を照射する可視光源とを有し、
前記プリズム体は、
生体と接触する生体接触面と、
前記生体接触面に接し、前記生体の凹部からの光と前記生体の凸部からの光とを全反射する反射面と、
前記生体接触面と対向し、前記反射面と接し、前記生体凹部からの光が到達せず、反射面で全反射された光と、前記生体の凸部からの光とを透過できる角度に設けられた撮像面と
を備え、
前記撮像部は、前記撮像面を透過する、前記生体の凸部からの光と、前記反射面により反射された前記生体の凹部からの光及び前記生体の凸部からの光とを撮像する
認証装置。 - 前記可視光源を前記生体の上部に配置し、
前記撮像部は、前記生体内を透過する光により撮像する
請求項1に記載の認証装置。 - 前記プリズム体の第1の側面及び第2の側面は、前記生体接触面と成す角度が90度よりも小さくなるように形成され、
前記第1の側面及び前記第2の側面の下部に前記可視光源を配置し、
前記撮像部は、前記可視光源による可視光の前記生体の反射光により撮像する
請求項1に記載の認証装置。 - 前記プリズム体の第1の側面及び第2の側面は、前記生体接触面と成す角度が90度よりも小さくなるように形成され、
前記生体の上部に可視光を照射する第1の可視光源を配置し、前記第1の側面及び前記第2の側面の下部に可視光を照射する第2の可視光源を配置し、
前記撮像部は、前記第1の可視光源による前記生体内を透過する光と、前記第2の可視光源による前記生体の反射光とにより撮像する
請求項1から請求項3のいずれかに記載の認証装置。 - 前記生体に赤外光を照射する赤外光源を、前記生体の上部に配置し、
前記生体を透過した赤外光を撮像する第2の撮像部を、前記生体の下部に配置し、
前記可視光源と前記赤外光源とを時間をずらして発光させ、
前記可視光源の可視光による生体の撮像と前記赤外光源の赤外光による生体の撮像とを時間をずらして行う
請求項1から請求項4のいずれかに記載の認証装置。 - 前記赤外光を照射する赤外光源を前記生体の上部に配置し、
前記撮像装置の前面に赤外光カットする可視光透過フィルターを配置し、
前記生体の下部に可視光カットする赤外光透過フィルターを配置し、
前記赤外光透過フィルターの下部に、前記生体を透過した赤外光を撮像する第2の撮像部を配置し、
前記可視光源と前記赤外光源とを同時に発光させ、
前記可視光源の可視光による生体の撮像と前記赤外光源の赤外光による生体の撮像とを同時に行う
請求項1から請求項5のいずれかに記載の認証装置。 - 前記生体に赤外光を照射する赤外光源を、前記生体の下部に配置し、
前記生体を透過した赤外光を撮像する第2の撮像部を、前記生体の下部に配置し、
前記可視光源と前記赤外光源とを時間をずらして発光させ、
前記可視光源の可視光による生体の撮像と前記赤外光源の赤外光による生体の撮像とを時間をずらして行う
請求項1から請求項6のいずれかに記載の認証装置。 - 前記撮像装置の前面に赤外光カットする可視光透過フィルターを配置し、
前記赤外光を照射する赤外光源を前記生体の下部に配置し、
前記生体を透過した赤外光を撮像する第2の撮像部を、前記生体の下部に配置し、
前記赤外光源及び第2の撮像部と、前記生体との間に可視光カットする赤外光透過フィルターを配置し、
前記可視光源と前記赤外光源とを同時に発光させ、
前記可視光源の可視光による生体の撮像と前記赤外光源の赤外光による生体の撮像とを同時に行う
請求項1から請求項7のいずれかに記載の認証装置。 - 前記生体の凸部からの光が前記撮像面に直接到達した光を撮像した画像が生体認証用のハイコントラスト画像であり、
前記反射面により反射された前記生体の凹部からの光及び前記生体の凸部からの光を撮像した画像が偽造確認用の自然画像である
請求項1から請求項8のいずれかに記載の認証装置。 - 前記生体が人間の指である
請求項1から請求項9のいずれかに記載の認証装置。 - 生体認証用のプリズム体であって、
生体と接触する生体接触面と、
前記生体接触面に接し、前記生体の凹部からの光と前記生体の凸部からの光とを全反射する反射面と、
前記生体接触面と対向し、前記反射面と接し、前記生体凹部からの光が到達せず、反射面12で全反射された光と、前記生体の凸部からの光とを透過できる角度に設けられた撮像面と
を備える生体認証用のプリズム体。 - 前記プリズム体の第1の側面及び第2の側面は、前記生体接触面と成す角度が90度よりも小さくなるように形成されている
請求項11に記載の生体認証用のプリズム体。 - 生体と接触する生体接触面と、
前記生体接触面に接し、前記生体の凹部からの光と前記生体の凸部からの光とを全反射する反射面と、
前記生体接触面と対向し、前記反射面と接し、前記生体凹部からの光が到達せず、反射面12で全反射された光と、前記生体の凸部からの光とを透過できる角度に設けられた撮像面と
を備えるプリズム体の前記生体接触面に生体を接触させ、
前記生体に可視光を照射し、
前記撮像面を透過する、前記生体の凸部からの光と、前記反射面により反射された前記生体の凹部からの光及び前記生体の凸部からの光とを撮像する
認証方法。 - 可視光を前記生体の上部から照射し、
前記生体内を透過する光により撮像する
請求項13に記載の認証方法。 - 前記プリズム体の第1の側面及び第2の側面は、前記生体接触面と成す角度が90度よりも小さくなるように形成され、
前記第1の側面及び前記第2の側面の下部から、前記第1の側面及び前記第2の側面に可視光を照射し、
前記可視光源による可視光の前記生体の反射光により撮像する
請求項13に記載の認証方法。
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CN104221050B (zh) | 2017-08-25 |
CN104221050A (zh) | 2014-12-17 |
JPWO2013146759A1 (ja) | 2015-12-14 |
JP5811385B2 (ja) | 2015-11-11 |
US20150054932A1 (en) | 2015-02-26 |
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