JP2009223786A - Face authentication system using binocular imaging device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the size and manufacturing cost of a face authentication system while ensuring accurate face authentication. <P>SOLUTION: The face authentication system 1 includes: a binocular imaging device 2; a face authentication device 4; and a card 3 storing an ID number. The face authentication device 4 includes a card installation part 42 for reading the ID number stored in the card 3; and a storage part. Three-dimensional information of an authentication object person's face is preliminarily stored in the storage part in association with the ID number. The binocular imaging device 2 includes nine optical lenses and one area sensor, the respective optical axes of the optical lenses being parallel to each other. The face authentication system 1 takes an image of the authentication object person using the binocular imaging device 2, acquires three-dimensional information of the face image, verifies the three-dimensional information of the taken face image with the three-dimensional image of the face image read from the storage part, and determines that the person is authenticated when both pieces of the information is matched. Accordingly, it is not necessary to provide a plurality of imaging devices. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a face authentication system, and more particularly to a face authentication system using a compound eye imaging device.

  2. Description of the Related Art Conventionally, as a method for performing personal authentication, a face authentication system that performs face authentication by capturing and collating a face of a person to be authenticated is known (for example, see Patent Document 1). This type of system performs face authentication using two-dimensional information of a captured face image. However, in this type of face authentication system using two-dimensional information, there is a possibility that impersonation using a face photograph or the like may be performed, and thus there is a problem that the accuracy of face authentication is low.

  In order to improve the accuracy of face authentication with respect to the above problem, a face authentication system using three-dimensional feature point information based on the three-dimensional shape of the face of the person to be authenticated is known. For example, as this type of system, a face authentication system that performs authentication by acquiring three-dimensional information by imaging the face of the person to be authenticated from two different directions using two cameras (see, for example, Patent Document 2) ), And the three-dimensional shape of the face of the person to be authenticated is measured using two cameras, three-dimensional feature point information is acquired based on the measured information, and the acquired three-dimensional feature point information is used as 2 of the face image. There is a face authentication system (see, for example, Patent Document 3) that improves the accuracy of face authentication by adding to dimension information.

  As described above, in order to improve the accuracy of face authentication in the face authentication system, the measurement accuracy of the three-dimensional shape of the face of the person to be authenticated may be improved by increasing the number of cameras. However, when the number of cameras increases, the manufacturing cost of the face authentication system cannot be reduced, and the size of the face authentication system cannot be reduced.

  By the way, Patent Document 4 discloses a face authentication system including a convex mirror in the vicinity of an imaging device. However, in this system, since the three-dimensional shape of the face of the person to be authenticated cannot be measured, accurate face authentication cannot be performed. Further, in this system, since the convex mirror is at a position that is out of the line of sight of the person to be authenticated at the time of imaging, it is difficult for the person to be authenticated to adjust the position of the face to an appropriate imaging position while viewing the convex mirror. is there.

  Patent Document 5 discloses a face authentication system in which an imaging device is built in a card. However, in this system, since the three-dimensional shape of the face of the person to be authenticated cannot be measured, accurate face authentication cannot be performed.

Patent Document 6 discloses a face authentication system including a compound eye imaging device having an off-axial reflecting surface as a component. However, since this system uses an off-axial reflecting surface as a component, the configuration of the optical system becomes complicated, and it is difficult to reduce the size of the face authentication system.
JP 2003-317036 A JP 2006-221377 A JP 2007-58397 A JP 2007-4613 A JP 2003-187208 A JP 2000-105435 A

  The present invention has been made to solve the above-described problems, and can perform highly accurate face recognition, reduce the size of the system, and suppress the manufacturing cost of the system. It is an object of the present invention to provide a face authentication system that can be used.

  In order to achieve the above object, the invention of claim 1 comprises a compound eye imaging device for imaging the face of the person to be authenticated, and storage means for storing previously acquired three-dimensional face image information of the person to be authenticated. In the face authentication system for performing face authentication by imaging the face of the person to be authenticated using the compound eye imaging device and then comparing the face image information stored in the storage unit, the compound eye imaging device includes: One area sensor that receives reflected light from a subject, performs photoelectric conversion, and outputs an image signal, and a plurality of optical systems arranged to form an image of light from the subject with respect to the area sensor Each optical axis of the plurality of optical systems is parallel to the optical axes of all other optical systems, and the three-dimensional face image information acquired using the compound eye imaging device, 3D face image stored in storage means And performs face authentication by collating the distribution.

  According to a second aspect of the present invention, in the first aspect of the invention, the face authentication system includes a card in which identification information for identifying the person to be authenticated is stored, and the card is mounted and stored in the card. Card reading means for reading the identification information, the compound eye imaging device is built in the card, and when the card is mounted on the card reading means, the compound eye imaging device is It captures the face.

  According to a third aspect of the present invention, in the first aspect of the invention, the face authentication system includes a contactless IC card storing identification information for identifying the person to be authenticated, and the contactless IC card. A card reader for reading the identification information by communicating with a built-in IC chip; and the compound-eye imaging device is built in the non-contact type IC card and stored in the non-contact type IC card. When the identification information being read is read by the card reader, the compound eye imaging device images the face of the person to be authenticated.

  According to a fourth aspect of the present invention, in the first aspect of the invention, the face authentication system further includes a mirror disposed at a position where the person to be authenticated can visually recognize his / her face, and the compound eye imaging device includes: The mirror is disposed near the center of the surface visually recognized by the person to be authenticated.

  According to a fifth aspect of the present invention, in the invention of the second aspect, the card has a convex mirror at a position where the person to be authenticated can visually recognize his / her face, and the compound-eye imaging device includes the convex mirror. These are arranged in the vicinity of the center of the surface visually recognized by the person to be authenticated.

  The invention of claim 6 is the invention of claim 3, wherein the non-contact IC card has a convex mirror at a position where the person to be authenticated can see his / her face, and the compound eye imaging device The convex mirror is disposed near the center of the surface visually recognized by the person to be authenticated.

  The invention of claim 7 is the invention of claim 4, wherein the surface of the mirror visually recognized by the person to be authenticated is a convex surface.

  The invention according to claim 8 is the invention according to claim 4, wherein the surface of the mirror visually recognized by the person to be authenticated is a flat surface.

  According to the first aspect of the present invention, the compound-eye imaging device has one area sensor and a plurality of optical systems, and each optical axis of the plurality of optical systems is light of all other optical systems. Parallel to the axis. Thereby, since the three-dimensional shape of the face of the person to be authenticated can be measured without providing a plurality of imaging devices, the accuracy of face authentication can be improved. In addition, since it is not necessary to provide a plurality of imaging devices, the face authentication system can be reduced in size and the manufacturing cost can be suppressed.

  According to the invention of claim 2, since the compound-eye imaging device is built in the card, the face authentication system can be miniaturized and the manufacturing cost can be suppressed.

  According to the invention of claim 3, since the compound eye imaging device is built in the non-contact type IC card, the person to be authenticated can freely adjust the imaging direction of the compound eye imaging device 2. Therefore, since the face position can be easily adjusted to the appropriate imaging direction, the three-dimensional shape of the face of the person to be authenticated can be accurately measured, and the accuracy of face authentication can be improved.

  According to the invention of claim 4, the compound eye imaging device is disposed near the center of the surface of the mirror visually recognized by the person to be authenticated, so that the person to be authenticated recognizes the position of his / her face while visually recognizing the mirror. It can be easily adjusted to an appropriate imaging direction. Accordingly, it is possible to prevent a face authentication failure due to a shift of the imaging position, and thus it is possible to improve the accuracy of the face authentication.

  According to the invention of claim 5 and claim 6, since the compound eye imaging device is disposed near the center of the surface of the convex mirror visually recognized by the person to be authenticated, the person to be authenticated visually recognizes the convex mirror, The position of the own face can be easily adjusted to an appropriate imaging direction. Accordingly, it is possible to prevent a face authentication failure due to a shift of the imaging position, and thus it is possible to improve the accuracy of the face authentication.

  According to the invention of claim 7, since the mirror surface visually recognized by the person to be authenticated is a convex surface, the installation area of the mirror can be reduced, so that the size of the face authentication system including the mirror is reduced. be able to.

  According to the invention of claim 8, the same effect as that of the invention of claim 4 can be obtained.

  A face authentication system according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows the appearance of a face authentication system 1 according to the present embodiment, FIG. 2 shows the appearance of a card 3 in which an ID number (identification information) for identifying a person to be authenticated is stored, and FIG. 1 shows a schematic configuration of an authentication system 1. The face authentication system 1 is a system for performing authentication by comparing face image information stored in advance after imaging the face of the person to be authenticated.

  The face authentication system 1 is a system that includes a compound eye imaging device 2 for imaging the face of the person to be authenticated, a face authentication device 4, and a card 3 in which information such as an ID number is stored. The compound eye imaging device 2 is built in the face authentication device 4.

  The compound-eye imaging device 2 includes one area sensor and an optical system such as a plurality of optical lenses. Details of the configuration of the compound-eye imaging device 2 will be described later.

  The face authentication device 4 includes a compound-eye imaging device 2, a display unit 41 for displaying various messages, a card 3, and a card for reading information such as an ID number stored in the mounted card 3. A mounting unit (card reading unit) 42, an operation unit 43 that is operated by the person to be authenticated and instructs the face authentication system 1 to perform various processes, and a storage unit (storage unit) 44 that stores various types of information. And a communication unit 45 for communicating with various servers via the Internet.

  The storage unit 44 stores in advance the three-dimensional information of the face of the person to be authenticated in a state corresponding to the ID number of the person to be authenticated. The three-dimensional information of the authentication subject's face is information obtained by imaging the authentication subject's face using the compound eye imaging device 2 and based on the captured face image information.

  As shown in FIG. 2, the card 3 has a contact type IC chip 31. The IC chip 31 stores information such as the ID number of the person to be authenticated. The surface of the IC chip 31 is an external contact terminal, and when the card 3 is mounted on the card mounting portion 42, the surface of the IC chip 31 is in contact with a contact terminal (not shown) in the card mounting portion 42. Thus, the operating power of the IC chip 31 is obtained, and information in the IC chip 31 is read and written. The card 3 may have a magnetic strap, and information such as the ID number of the person to be authenticated may be stored in the magnetic strap.

  Next, a detailed configuration of the compound eye imaging apparatus 2 will be described with reference to FIGS. 4 and 5. 4 is a front view of the compound-eye imaging device 2, and FIG. 5 is a side sectional view showing a schematic configuration of the optical system of the compound-eye imaging device 2 viewed from the direction of the white arrow shown in FIG.

  The compound-eye imaging device 2 includes nine optical lenses 21a to 21i in three rows and three columns, and one area sensor 24 that receives reflected light from a subject, performs photoelectric conversion, and outputs an image signal. The compound eye imaging device 2 is disposed between the optical lenses 21a to 21i and the area sensor 24, and transmits an optical filter 23 that transmits only visible light from the light emitted from the optical lenses 21a to 21i, and the optical lenses 21a to 21i. , And a space between the optical lens 21a to 21i and the area sensor 24 perpendicular to the optical axis L, and a diaphragm member 22 for blocking unnecessary external light incident on the optical lenses 21a to 21i. And a light shielding block 25 that is partitioned on the surface. The optical axes L of the optical lenses 21a to 21i are parallel to each other as shown in FIG.

  In the face authentication system 1, the compound eye imaging device 2 only needs to image the face of the person to be authenticated in order to perform face authentication. When imaging only the face of the person to be authenticated, the distance from the compound-eye imaging device 2 to the person to be authenticated may be about 30 centimeters to 50 centimeters. At this distance, the baseline length between the optical lenses 21a to 21i is short. In addition, it is possible to sufficiently measure the three-dimensional shape of the face of the person to be authenticated.

  The area sensor 24 is composed of a CMOS (Complementary Metal Oxide Semiconductor) image sensor and a CCD (Charge Coupled Device).

  The light blocking block 25 is installed between the optical lenses 21 a to 21 i and partitions the area sensor 24. Thereby, the light emitted from each of the optical lenses 21a to 21i can be prevented from interfering with each other, and the area sensor 24 can perform imaging with high accuracy.

  Next, an imaging procedure by the compound eye imaging device 2 will be described. Light from the subject (person to be authenticated) is regulated to a constant light amount by the diaphragm member 22 and enters each of the optical lenses 21a to 21i. Then, the light emitted from each of the optical lenses 21 a to 21 i reaches the area sensor 24 through the optical filter 23 and forms nine images on the area sensor 24.

  The nine images formed on the area sensor 24 are converted into image signals, output from the area sensor 24, and input to the control microcomputer 40 (see FIG. 3). The control microcomputer 40 acquires face image three-dimensional information based on the input image signal, and performs face authentication processing. Details of the face authentication process will be described later.

  Next, the procedure of face authentication processing will be described. First, when a person to be authenticated inserts and inserts the card 3 into the card mounting unit 42, the card mounting unit 42 reads the ID number stored in the IC chip 31 of the card 3, and uses the read ID information as a control microcomputer. 40.

  The control microcomputer 40 reads the three-dimensional information of the face of the person to be authenticated stored in advance in the storage unit 44 based on the read ID number. Then, the control microcomputer 40 images the face of the person to be authenticated using the compound eye imaging device 2 and acquires three-dimensional information of the face image. In addition, the timing which images a subject of authentication using the compound eye imaging device 2 may be when the subject of authentication approaches the compound eye imaging device 2.

  Specifically, the three-dimensional information of the face image is, for example, the measurement of the three-dimensional shape by specifying the face contour region, the eye, the nose, and the mouth region from the nine captured face images. Is the three-dimensional information of the face image obtained.

  Then, the control microcomputer 40 collates the three-dimensional information of the face image read from the storage unit 44 with the three-dimensional information of the captured face image, and determines that the authentication is OK when the information is the same.

  As described above, according to the face authentication system 1 according to the present embodiment, the compound eye imaging device 2 includes one area sensor 24 and the plurality of optical lenses 21a to 21i, and among the optical lenses 21a to 21i. Are parallel to each other. Therefore, since it is possible to measure the three-dimensional shape of the face of the person to be authenticated without providing a plurality of imaging devices as in the prior art, the accuracy of face authentication can be improved. In addition, since there is no need to provide a plurality of imaging devices, the face authentication system 1 can be reduced in size and the manufacturing cost can be suppressed.

  Next, a face authentication system according to a second embodiment of the present invention will be described with reference to FIG. The face authentication system 1 according to the present embodiment has the same configuration as the face authentication system shown in the first embodiment, except that the face authentication system 1 further includes a mirror 5. 6A shows a state before the face of the person to be authenticated appears on the mirror 5, and FIG. 6B shows a state where the face of the person to be authenticated appears on the mirror 5. In addition, in each figure, the member which attached | subjected the same code | symbol shows that it is a member similar to 1st Embodiment, The description is abbreviate | omitted.

  The mirror 5 is disposed above the display unit 41 as shown in FIG. In the vicinity of the center of the reflecting surface of the mirror 5, the compound eye imaging device 2 is disposed. The imaging direction of the compound eye imaging device 2 is a direction perpendicular to the reflecting surface of the mirror 5.

  When performing the face authentication, the person to be authenticated can visually recognize his / her face image P1 reflected on the mirror 5, as shown in FIG. 6B. At this time, since the face of the person to be authenticated and the compound eye imaging device 2 face each other, the compound eye imaging apparatus 2 can pick up the face of the person to be authenticated from the front.

  As described above, according to the face authentication system 1 according to the present embodiment, the compound eye imaging device 2 is disposed in the vicinity of the center of the reflection surface of the mirror 5 viewed by the person to be authenticated. The face image P <b> 1 of the subject's face reflected on the mirror 5 can be visually recognized. Therefore, the person to be authenticated can easily adjust the position of his / her face to an appropriate imaging direction while visually recognizing the mirror, thereby preventing face authentication failure due to misalignment of the imaging position. Can be improved.

  In addition, the person to be authenticated easily adjusts the position of the face by adjusting the position of the face so that the nose of the compound eye imaging device 2 overlaps with the self-image reflected on the reflecting surface of the mirror 5. Therefore, it is possible to prevent the face authentication failure due to the shift of the image pickup position and improve the accuracy of the face authentication.

  Moreover, the same effect as the face authentication system 1 shown in 1st Embodiment is acquired.

  Next, a face authentication system according to a third embodiment of the present invention will be described with reference to FIG. The face authentication system 1 according to the present embodiment has the same configuration as the face authentication system shown in the first embodiment, except that the face authentication system 1 further includes a convex mirror 6. FIG. 7A shows a state before the face of the person to be authenticated appears on the convex mirror 6, and FIG. 7B shows a state where the face of the person to be authenticated appears on the convex mirror 6. In addition, in each figure, the member which attached | subjected the same code | symbol shows that it is a member similar to 1st Embodiment, The description is abbreviate | omitted.

  The convex mirror 6 is disposed above the display unit 41 as shown in FIG. The reflecting surface of the convex mirror 6 has a convex shape, and the compound-eye imaging device 2 is located near the center of the reflecting surface of the convex mirror 6. The imaging direction of the compound eye imaging device 2 is a direction facing the authentication target person when the face of the authentication target person faces the reflection surface of the convex mirror 6.

  When the person to be authenticated performs face authentication, as shown in FIG. 7B, the person to be authenticated can visually recognize his / her face image P <b> 2 reflected on the reflecting surface of the convex mirror 6. At this time, since the face of the person to be authenticated and the compound eye imaging device 2 face each other, the compound eye imaging apparatus 2 can pick up the face of the person to be authenticated from the front.

  As described above, according to the face authentication system 1 according to the present embodiment, the compound eye imaging device 2 is disposed in the vicinity of the center of the reflection surface of the convex mirror 6 visually recognized by the person to be authenticated, and the person to be authenticated. Since the face of the person to be authenticated and the compound eye imaging device 2 face each other when the image P2 of the face of the person reflected on the convex mirror 6 is visible, the person to be authenticated Can be easily adjusted to the appropriate imaging direction. Accordingly, it is possible to prevent a face authentication failure due to a shift of the imaging position, and thus it is possible to improve the accuracy of the face authentication.

  In addition, since the reflecting surface of the convex mirror 6 has a convex shape, the entire face of the person to be authenticated can be copied even if the installation area of the convex mirror 6 is small. Therefore, the size of the convex mirror 6 can be reduced, and the size of the face authentication system 1 including the convex mirror 6 can be reduced.

  In addition, the person to be authenticated adjusts the position of the face so that the nose of the compound eye imaging device 2 overlaps with the position of the face while viewing the self image reflected on the reflecting surface of the convex mirror 6. Since it can be easily adjusted to an appropriate imaging direction, it is possible to prevent a face authentication failure due to a shift in the imaging position, and to improve the accuracy of the face authentication.

  Moreover, the same effect as the face authentication system 1 shown in 1st Embodiment is acquired.

  Next, a face authentication system according to a fourth embodiment of the present invention will be described with reference to FIGS. In the face authentication system 1 according to the present embodiment, the card 3 further includes the compound eye imaging device 2, the face authentication device 4 does not include the compound eye imaging device 2, and the card mounting unit 42 of the face authentication device 4 includes Except for being provided on the side surface of the display unit 41, the configuration is the same as that of the face authentication system 1 shown in the first embodiment.

  FIG. 8 shows an external appearance of the card 3, and FIG. 9 shows a schematic configuration of the card 3. FIG. 10A shows the appearance of the face authentication system 1 before the card 3 is mounted on the card mounting unit 42, and FIG. 10B shows the state where the card 3 is mounted on the card mounting unit 42. An appearance of the face authentication system 1 is shown. In addition, in each figure, the member which attached | subjected the same code | symbol shows that it is a member similar to 1st Embodiment, The description is abbreviate | omitted.

  As shown in FIGS. 8 and 9, the card 3 includes a control microcomputer 30, an IC chip 31, and a compound eye imaging device 2. The plurality of image signals captured by the compound eye imaging device 2 are transmitted to the control microcomputer 30, and the control microcomputer 30 transmits the plurality of image signals received from the compound eye imaging device 2 to the face authentication device 4. The operating power of the control microcomputer 30, the compound-eye imaging device 2, and the IC chip 31 is from the card mounting unit 42 via the IC chip 31 that is an external contact terminal when the card 3 is mounted on the card mounting unit 42. can get.

  Next, the procedure of face authentication processing will be described. First, when the person to be authenticated inserts and inserts the card 3 into the card mounting unit 42, the card mounting unit 42 reads the ID number stored in the IC chip 31 of the card 3 and transmits it to the control microcomputer 40.

  The control microcomputer 40 reads the three-dimensional information of the face of the person to be authenticated stored in advance in the storage unit 44 based on the read ID number. Then, the control microcomputer 40 instructs the card 3 to image the face of the person to be authenticated using the compound eye imaging device 2. The compound eye imaging device 2 of the card 3 images the face of the person to be authenticated based on the instruction transmitted from the control microcomputer 40, and the control microcomputer 30 controls the face authentication device 4 for a plurality of obtained image signals. It transmits to the microcomputer 40.

  Then, the control microcomputer 40 acquires three-dimensional information of the face image based on the received plurality of image signals, and performs face authentication processing. Since the face authentication process is the same as the process shown in the first embodiment, the description thereof is omitted.

  In the present embodiment, the face authentication process is performed by the control microcomputer 40 of the face authentication system 1, but the face authentication process may be performed by the control microcomputer 30 of the card 3. In this case, three-dimensional information of the face of the person to be authenticated is stored in advance in the IC card 3 of the card 3, and the control microcomputer 30 of the card 3 is a face image based on a plurality of images captured by the compound-eye imaging device 2. After the three-dimensional information is acquired, the three-dimensional information of the face image of the person to be authenticated stored in the IC chip 31 is collated. If these pieces of information are the same as a result of the authentication, an authentication result indicating that the face authentication is OK is transmitted to the control microcomputer 40 of the face authentication device 4. On the other hand, if the three-dimensional information of these face images does not match as a result of the authentication, the control microcomputer 30 of the card 3 gives an authentication result indicating that the face authentication is NG, and the control microcomputer 40 of the face authentication device 4. Send to.

  As described above, according to the face authentication system 1 according to the present embodiment, since the compound-eye imaging device 2 is built in the card 3, the face authentication system can be reduced in size and the manufacturing cost can be suppressed.

  Moreover, the same effect as the face authentication system 1 shown in 1st Embodiment is acquired.

  In the face authentication system 1 according to the present embodiment, a convex mirror having a convex reflecting surface is disposed on the surface of the card 3, and the compound-eye imaging device 2 is disposed in the vicinity of the center of the convex mirror. As in the face authentication system shown in the embodiment, the authentication target person may perform face authentication while looking at his / her own image.

  Next, a face authentication system according to a fifth embodiment of the present invention will be described with reference to FIGS. The face authentication system 1 according to the present embodiment includes a non-contact type IC card 7 instead of a contact type card, and the face authentication device 4 performs wireless communication with the non-contact type IC card 7 instead of the card mounting unit. The configuration is the same as that of the face authentication system 1 shown in the fourth embodiment except that the card reader / writer 46 is provided.

  FIG. 11 shows an external appearance of the non-contact type IC card 7, and FIG. 12 shows a schematic configuration of the non-contact type IC card 7. FIG. 13 shows the external appearance of the face authentication system 1, and FIG. 14 is a diagram for explaining the operation when face authentication is performed by holding the non-contact type IC card 7 over the card reader / writer 46. FIG. In addition, in each figure, the member which attached | subjected the same code | symbol shows that it is a member similar to 4th Embodiment, The description is abbreviate | omitted.

  As shown in FIGS. 11 and 12, the non-contact type IC card 7 includes a compound eye imaging device 2, an antenna coil 71, an IC chip 72 that communicates with the face authentication device 4 via the antenna coil 71, and a control device. And a microcomputer 70.

  The antenna coil 71 receives the radio wave transmitted from the card reader / writer 46, obtains operating power of the control microcomputer 70 and the IC chip 72 by electromagnetic induction, and uses this radio wave to communicate with the card reader / writer 46. Perform data communication.

  The IC chip 72 is built in the non-contact type IC card 7, and information such as an ID number of the person to be authenticated is stored in the IC chip 72.

  The card reader / writer 46 includes an antenna coil (not shown), and performs radio communication with the non-contact type IC card 7 using radio waves. The card reader / writer 46 is disposed in the vicinity of the surface of the face authentication device 4 as shown in FIG.

  Next, the procedure of face authentication processing will be described with reference to FIG. First, when the person to be authenticated brings the non-contact type IC card 7 close to the card reader / writer 46, the non-contact type IC card 7 operates by obtaining operating power from the induced current generated by the antenna coil of the card reader / writer 46. To do. Then, the ID number stored in the IC chip 72 is transmitted to the card reader / writer 46, and the ID number received by the card reader / writer 46 is transmitted to the control microcomputer 40.

  The control microcomputer 40 reads the three-dimensional information of the face of the person to be authenticated stored in advance in the storage unit 44 based on the received ID number. Then, the control microcomputer 40 instructs the non-contact type IC 7 to image the face of the person to be authenticated using the compound eye imaging device 2. The compound eye imaging device 2 of the non-contact type IC card 7 images the face of the person to be authenticated based on the instruction transmitted from the control microcomputer 40. Then, the control microcomputer 70 of the non-contact type IC card 7 transmits a plurality of image signals obtained by imaging to the control microcomputer 40 of the face authentication device 4 via the antenna coil 71.

  Then, the control microcomputer 40 acquires three-dimensional information of the face image based on the received plurality of image signals, and performs face authentication processing. Since the face authentication process is the same as the process shown in the first embodiment, the description thereof is omitted.

  In this embodiment, an example in which the face authentication process is performed by the control microcomputer 40 of the face authentication system 1 has been described. However, the face authentication process is performed by the control microcomputer 70 of the non-contact type IC card 7. Also good. In this case, the IC chip 72 of the non-contact type IC card 7 stores in advance the three-dimensional information of the face of the person to be authenticated, and the control microcomputer 70 of the non-contact type IC card 7 is imaged by the compound eye imaging device 2. After acquiring the three-dimensional information of the face image based on the image, the face image is collated with the three-dimensional information of the face image of the person to be authenticated stored in the IC chip 72. If these pieces of information are the same as a result of the authentication, an authentication result indicating that the face authentication is OK is transmitted to the control microcomputer 40 of the face authentication device 4. On the other hand, if the three-dimensional information of these face images does not match as a result of authentication, the control microcomputer 30 of the card 3 sends an authentication result indicating that the face authentication is NG to the control microcomputer 40 of the face authentication device 4. Send to.

  As described above, according to the face authentication system 1 according to the present embodiment, the compound eye imaging device 2 is built in the non-contact type IC card 7, so that the person to be authenticated can freely set the imaging direction of the compound eye imaging device 2. Can be adjusted. Therefore, since the face position can be easily adjusted to the appropriate imaging direction, the three-dimensional shape of the face of the person to be authenticated can be accurately measured, and the accuracy of face authentication can be improved.

  Moreover, since the compound-eye imaging device 2 is built in the non-contact type IC card 7, the face authentication system can be reduced in size and the manufacturing cost can be suppressed. Moreover, the same effect as the face authentication system 1 shown in the fourth embodiment can be obtained.

  In the face authentication system 1 according to the present embodiment, a convex mirror whose reflecting surface is a convex shape is disposed on the surface of the non-contact type IC card 7, and the compound-eye imaging device 2 is disposed near the center of the convex mirror. Then, as in the face authentication system shown in the third embodiment, the configuration may be such that the person to be authenticated performs face authentication while looking at his / her own image.

  The present invention is not limited to the configuration of each of the embodiments described above, and various modifications can be made without departing from the spirit of the invention. For example, in each of the above embodiments, the compound-eye imaging device 2 includes nine optical lenses of 3 rows and 3 columns and acquires nine image signals. However, the present invention is not limited to this, and an arbitrary number of optical lenses may be used. It may have an optical system such as a lens and acquire any number of image signals.

  The face authentication device 4 may acquire three-dimensional information of the face of the person to be authenticated stored in advance from a server or the like via Internet communication or the like.

1 is a perspective view showing an appearance of a face authentication system according to a first embodiment of the present invention. The perspective view which shows the external appearance of the card | curd of the said face authentication system. The block diagram which shows schematic structure of the said face authentication system. The front view of the compound eye imaging device of the said face authentication system. FIG. 2 is a side sectional view showing a schematic configuration of the compound eye imaging apparatus. (A) (b) is a figure which shows the external appearance of the face authentication system which concerns on the 2nd Embodiment of this invention. (A) (b) is a figure which shows the external appearance of the face authentication system which concerns on the 3rd Embodiment of this invention. The perspective view which shows the external appearance of the card | curd of the face authentication system which concerns on the 4th Embodiment of this invention. The block diagram which shows schematic structure of the card | curd of the said face authentication system. (A) (b) is a perspective view which shows the external appearance of the said face authentication system. The perspective view which shows the external appearance of the card | curd of the face authentication system which concerns on the 5th Embodiment of this invention. The block diagram which shows schematic structure of the card | curd of the said face authentication system. The perspective view which shows the external appearance of the said face authentication system. Explanatory drawing which shows the face authentication operation | movement of the said face authentication system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Face authentication system 2 Compound eye imaging device 3 Card 4 Face authentication device 5 Mirror 6 Convex mirror (mirror)
7 Non-contact type IC card 21a to 21i Optical lens (optical system)
24 Area sensor 31 IC chip 42 Card mounting part (card reading means)
44 storage unit (storage means)
46 Card reader / writer (card reader)
72 IC chip L Optical axis

Claims (8)

A compound eye imaging device for imaging the face of the person to be authenticated;
Storage means for storing the three-dimensional face image information of the authentication subject acquired in advance,
In the face authentication system for performing face authentication by imaging the face of the person to be authenticated using the compound eye imaging device and then comparing the face image information stored in the storage unit,
The compound eye imaging device includes:
One area sensor that receives reflected light from a subject, performs photoelectric conversion, and outputs an image signal;
A plurality of optical systems arranged to image light from a subject with respect to the area sensor;
Each optical axis of the plurality of optical systems is parallel to the optical axes of all other optical systems,
A face authentication system for performing face authentication by comparing three-dimensional face image information acquired using the compound-eye imaging device with three-dimensional face image information stored in the storage unit. The face authentication system includes:
A card storing identification information for identifying the person to be authenticated;
A card reader for reading the identification information stored in the card,
The compound eye imaging device is built in the card,
2. The face authentication system according to claim 1, wherein when the card is attached to the card reading unit, the compound eye imaging device images the face of the person to be authenticated. The face authentication system includes:
A contactless IC card in which identification information for identifying the person to be authenticated is stored;
A card reader for reading the identification information by communicating with an IC chip built in the non-contact type IC card;
The compound eye imaging device is built in the non-contact type IC card,
2. The face authentication system according to claim 1, wherein when the identification information stored in the non-contact type IC card is read by the card reader, the compound eye imaging device images the face of the person to be authenticated. . The face authentication system further includes a mirror disposed at a position where the person to be authenticated can visually recognize his / her face,
The face authentication system according to claim 1, wherein the compound-eye imaging device is disposed near a center of a surface of the mirror that is visually recognized by the person to be authenticated. The card has a convex mirror at a position where the person to be authenticated can visually recognize his / her face,
The face recognition system according to claim 2, wherein the compound eye imaging device is disposed in the vicinity of a center of a surface of the convex mirror that is visually recognized by the person to be authenticated. The non-contact IC card has a convex mirror at a position where the person to be authenticated can visually recognize his / her face,
The face recognition system according to claim 3, wherein the compound eye imaging device is disposed in the vicinity of the center of the surface of the convex mirror that is visually recognized by the person to be authenticated.   The face authentication system according to claim 4, wherein a surface of the mirror visually recognized by the person to be authenticated is a convex surface.   The face authentication system according to claim 4, wherein a surface of the mirror visually recognized by the person to be authenticated is a flat surface.

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