TW201712582A - Iris authentication device - Google Patents

Abstract

The present invention provides an iris authentication device for easily reducing cost. This iris authentication device comprises: a door 2 in a plate shape having a first face 21 formed with a first window 23 and a second face 22 formed with a second window 24; a camera portion 3 for photographing images and being received between the first face 21 and the second face 22 of the door 2, in which an optical axis of an optical system 32 extends in a direction along the plate face; a movable mirror 4 arranged in a camera range of the camera portion 3 between the first face 21 and the second face 22, for bending an optical path to directions of the first window 23 and the second window 24, so as to make the camera portion 3 shoot outside the first window 23 or the second window 24; and an authentication processing portion 53 for performing an iris authentication based the image shoot by the camera portion 3.

Description

Iris certification device

The present invention relates to an iris authentication device that performs authentication by taking an image of an iris of a human eye.

Photographing the iris image of the human eye to authenticate iris recognition is a well-known technique for a long time. Iris certification is used to manage areas where security is required, such as rooms or buildings. In this way, the iris certification for managing the entry and exit of the person must authenticate the person entering the area and the person coming out of the area, so the image of the iris is set on the outer and inner walls near the entrance and exit of the area. A camera (proofing machine) (see, for example, Patent Document 1).

[Previous Technical Literature] [Patent Literature]

(Patent Document 1) Japanese Patent Laid-Open Publication No. 2001-118103

However, in the above technique, it is necessary to mount a total of two cameras for iris photography on the outside and inside of a room or a building, so The problem of increasing the cost of setting up the camera.

It is an object of the present invention to provide an iris authentication apparatus which is easy to reduce cost.

An iris authentication device according to the present invention includes: a first window having a first surface and a second surface along a plate surface, a first window formed on the first surface, and a plate having a second window formed on the second surface Imaging the image between the first surface and the second surface of the door, and the optical axis of the imaging optical system is directed toward the imaging unit extending in the direction of the plate surface; The first surface and the second surface are disposed in an imaging range of the imaging unit, and the optical path for imaging is bent in the first window direction and the second window direction, and the imaging unit captures the image. An optical path bending portion on the outer side of the first window or the outer side of the second window; and an authentication processing unit that performs iris authentication based on the captured image captured by the imaging unit.

Further, the iris authentication device of the present invention is attached to a plate-shaped door having a first surface and a second surface along a plate surface, and a first window is formed on the first surface, The second surface is formed with a second window, and the iris authentication device includes light that is imaged between the first surface and the second surface of the door and is used for the optical system for imaging An imaging unit extending in a direction along the plate surface; disposed between the first surface and the second surface in an imaging range of the imaging unit, and bending the optical path of the imaging to the first a window direction and the second window direction, whereby the imaging unit captures an outer side of the first window or an optical path bent portion outside the second window; and The photographic image taken by the image unit is subjected to an iris authentication authentication processing unit.

According to the iris authentication device, the imaging unit is housed in the door, and the optical path of the imaging unit is bent to the first and second window directions provided on both sides of the door. Therefore, the imaging unit can be used to image the outside of the door and The image on the inside. Therefore, iris authentication can be performed based on an image obtained by photographing a person outside the door and a person inside the door by one imaging unit. As a result, the imaging unit is only required to be one, and thus it is easier to reduce the cost as compared with the case where the camera for photographing the iris is provided on the outer and inner walls near the entrance and exit as in the prior art. Moreover, as long as the door is replaced, the iris authentication can be performed, so that it is not necessary to provide the construction of the camera on the outer and inner walls near the entrance and exit as in the prior art. Thus, it is easier to reduce the construction cost required to set the iris authentication device as compared with the prior art.

Preferably, the optical path bending portion is disposed on the optical path, and is configured to be changeable between a first posture in which the optical path faces the first window direction and a second posture in which the optical path faces the second window direction In the posture mirror, the iris authentication device further includes an imaging direction switching unit that images the outer side of the first window or the outer side of the second window by changing the posture of the movable mirror.

According to this configuration, both sides of the door can be imaged by one imaging unit by changing the posture of the movable mirror.

Further, it is preferable that the imaging direction switching unit changes the posture in a state in which the movable mirror periodically alternates between the first posture and the second posture.

According to this configuration, the camera unit can interactively capture two of the doors The side, so the user does not need to do a special operation, as long as the eye is located near the first window or the second window, the user's iris can be photographed for iris authentication regardless of whether the user is inside or outside the door.

Further, the door system has a predetermined vertical direction when the door window structure is vertically arranged, and the imaging direction switching unit sets the imaging range to the first window and the second window in the first and second postures. The outer side faces the plurality of directions arranged in the vertical direction to change the posture of the movable mirror, and the imaging unit preferably captures images in the plurality of directions on the outer sides of the first window and the second window. .

According to this configuration, even if the user has a user with a different eye height such as a child and an adult, a person who is short, and has a high height, the iris can be photographed.

Further, the optical path bending portion preferably includes: a first bent portion that is disposed on the optical path, the optical path is bent toward the first window direction, and a second fold that bends the optical path toward the second window direction Music department.

According to this configuration, even if the movable mirror is not provided, both sides of the door can be photographed, so that the user does not need to perform a special operation as long as the eye is located near the first window or the second window, regardless of whether the user is inside or outside the door. The iris of the user can be photographed for iris authentication. Moreover, since the movable mirror is not required, the durability of the iris authentication device is improved.

Further, the door system has a predetermined vertical direction when the door window structure is vertically arranged, and the first bending portion and the second bending portion respectively include the imaging range for the first window and the second The outer side of the window faces a plurality of bent portions in a plurality of directions arranged in the vertical direction.

According to this configuration, even if the user has a user with a different eye height such as a child and an adult, a person who is short, and has a high height, the iris can be photographed.

Further, it is preferable that the first bent portion and the second bent portion change a direction of the optical path by a mirror or a prism.

According to this configuration, it is easy to bend the optical path by using a mirror or a cymbal.

Further, the first window and the second window are sealed by a cold mirror having a plurality of reflecting surfaces that extend in a direction intersecting the plurality of directions.

According to this configuration, since the cold mirror allows infrared rays to transmit visible light, the user can position his or her eyes at an appropriate imaging position by reflecting his or her eyes on the cold mirror. In addition, by imaging with infrared light, the iris image can be captured regardless of the color difference of the iris, and the iris authentication process becomes easy. Furthermore, when illumination is performed by infrared light, illumination can be performed without the user being dazzled.

Further, it is preferable that the authentication processing unit performs the first authentication based on the iris image included in the captured image and the inverse of the fact that the iris image is substantially inverted by 180 degrees in the vertical direction and the horizontal direction. Transfer the second certification of the data.

On the first side and the second side of the door, due to the optical path bending The direction in which the optical path is bent is reversed, so the images on both sides are inverted by 180 degrees from top to bottom. Therefore, according to this configuration, the first authentication based on the iris image included in the captured image and the second authentication based on the case where the iris image is substantially inverted by 180 degrees in the up and down direction and the left and right direction are performed. For authentication, iris authentication can be performed regardless of which image is captured.

Further, in the first authentication, the authentication processing unit preferably cuts the ring at a predetermined position on the annular image of the iris obtained from the captured image, and then cuts the ring at the predetermined position. The two sides of the ring are pulled outward to expand the ring into a strip shape to generate strip-shaped data, and the authentication is performed based on the strip data. In the second authentication, the iris of the obtained image is obtained. An image of the shape, the ring is cut at the predetermined position, and then the strip is formed by pulling the two sides of the cut ring outward to expand the ring into a strip shape, and then the strip data is generated. The cutting is performed at the center position in the longitudinal direction of the belt, and then the two pieces of the cut data are interchanged and connected to generate the inverted data, and the reverse data is used for authentication.

According to this configuration, in the second authentication, the ring is cut at a predetermined position with respect to the annular image of the iris obtained from the photographed image, and then the both sides of the cut ring are pulled outward. The strip-shaped data is generated by unfolding the loop into a strip shape, and the strip-shaped data is cut at the central position in the longitudinal direction of the strip, and then the cut two pieces of data are interchanged and connected to obtain an iris. When the image is inverted 180 degrees up and down, the same data is reversed, so the iris image is inverted up and down and left and right. The 180 degree comparison makes the calculation process simple.

Further, it is preferable that the authentication processing unit determines that the iris authentication is successful when any of the first authentication and the second authentication is successful.

According to this configuration, the iris authentication can be performed correctly regardless of whether the user authenticates on the outside or inside of the door.

Further, the authentication processing unit determines which of the first surface side and the second surface side of the door is the authentication of the first authentication and the second authentication. Certification.

According to this configuration, it is possible to determine which side of the door is authenticated by the user based on the authentication result.

Moreover, the iris authentication device of the present invention is an iris authentication device that is attached to a door having a first window and a second surface along the first surface and having a first window on the first surface, and is provided with: The image is captured and received between the first surface and the second surface of the door, and the optical axis of the optical system to be imaged is directed toward the imaging unit extending in the direction of the plate surface; Between one surface and the second surface, the optical path for the imaging is bent in the imaging direction of the imaging unit, and the imaging unit captures the outer side of the first window. An optical path bending portion; and an authentication processing unit that performs iris authentication based on the captured image captured by the imaging unit; wherein the door system has a predetermined vertical direction when vertically arranged as a window structure, and the optical path is folded The curved portion causes the aforementioned imaging range to face the outer side of the first window along the aforementioned A plurality of directions arranged in the up and down direction.

According to this configuration, even if the user has a user having a different line of sight such as a child and an adult, a person who is short, and has a high height, the iris can be photographed. Further, the optical path bending portion can image the imaging range of the imaging unit in a plurality of directions arranged in the vertical direction, and can capture the iris of the user having a different line of sight height. Therefore, since it is not necessary to provide a plurality of imaging units corresponding to users having different line-of-sight heights, it is easier to reduce the cost than in the case of providing a plurality of imaging units corresponding to a plurality of directions.

Preferably, the optical path bending portion is disposed on the optical path, and is configured as a movable mirror that can change a posture between the plurality of postures in a plurality of directions arranged in the vertical direction along the optical path. The iris authentication device further includes an imaging direction switching unit that changes the posture of the movable mirror so that the imaging range is directed to the outer side of the first window in a plurality of directions along the vertical direction, and the imaging unit The department takes an image of the aforementioned plurality of directions on the outer side of the first window.

According to this configuration, since a plurality of images arranged in the vertical direction can be imaged by one movable mirror, the optical path bent portion can be configured with a simple configuration.

Further, the optical path bending portion may include a plurality of bent portions disposed on the optical path such that the imaging range is directed to a plurality of directions along the outer side of the first window in the vertical direction.

According to this configuration, since the movable mirror can be omitted, the durability of the iris authentication device is improved.

Further, the imaging direction switching unit performs posture changing processing for changing the posture of the movable mirror so that the imaging range is sequentially directed to the plurality of directions, and the iris authentication device further includes: determining that the movable mirror is adapted to the movable mirror Whether the posture determination unit of the eye is present in the imaging range of the imaging unit in which the posture is changed; and when the posture determination unit determines that the eye is present in the imaging range, the posture change performed by the imaging direction switching unit is performed. The imaging processing unit that is stopped.

According to this configuration, the posture changing process of changing the posture of the movable mirror so that the imaging range is sequentially directed to the plurality of directions is performed, so that imaging is performed in a plurality of directions. When the human eye appears in the imaging range of the imaging unit during the scanning process, that is, when the iris is authenticated, the posture change caused by the imaging direction switching unit is stopped. Therefore, it is not necessary to continuously change the posture of the movable mirror, so that the energy consumption required to drive the movable mirror is reduced, and the loss and deterioration of the driving mechanism of the movable mirror are reduced.

Further, it is preferable that the imaging unit sequentially captures images in the plurality of directions in response to a change in posture of the movable mirror, and the posture determination unit is configured to capture the image by the imaging unit each time. Whether or not the person's eyes are photographed, and whether there is a person's eyes within the aforementioned imaging range.

According to this configuration, it is determined whether or not a person's eyes are captured in the image captured by the imaging unit while changing the posture of the movable mirror and changing the direction of the imaging range. When a person's eyes are photographed in an image taken by the camera unit, the human eye enters the imaging range, so it can be determined. Whether there are people's eyes in the camera range.

Furthermore, it is preferable to further include: a human body detecting unit for detecting a human body in a plurality of imaging ranges corresponding to the plurality of directions, wherein the imaging direction switching unit is based on the human body detecting unit The posture detection processing is started when the human body detects the result.

According to this configuration, the human body detecting unit detects the plurality of imaging ranges corresponding to the plurality of directions, that is, the position of the human body within the range that can be captured by the imaging unit. Then, the posture changing process is started in accordance with the human body detection result of the human body detecting unit. Therefore, the posture changing process can be started when the person who is the subject of the iris authentication comes to the photographable direction. As a result, it is not necessary to continuously change the posture of the movable mirror, and the energy consumption required to drive the movable mirror is reduced, and the loss and deterioration of the driving mechanism of the movable mirror are reduced.

Further, it is preferable to further include an infrared detecting unit for detecting a direction of the infrared ray emitted from the human body and having directivity in the detection direction, wherein the imaging direction switching unit changes in accordance with the posture change of the movable mirror The detection direction is directed to the imaging range, and the posture determination unit determines whether or not there is an eye in the imaging range of the imaging unit based on the detection result of the infrared ray by the direction detecting infrared detector.

According to this configuration, the infrared ray detecting unit detects the infrared ray in the direction in which the direction of the infrared ray detection in the human body is directed. Therefore, when the infrared ray detecting unit detects the predetermined infrared ray, the direction detecting unit indicates that the infrared ray detecting unit detects the predetermined infrared ray. The direction of detection is there. Moreover, the camera direction switching When the direction of the movable mirror is changed, the detection direction of the direction detecting infrared detecting unit is directed toward the imaging range. Therefore, when the predetermined infrared ray is detected by the direction detecting infrared ray detector, the imaging range is indicated. There are people in the direction. Therefore, the posture determination unit can determine whether or not there is a person's eyes in the imaging range of the imaging unit based on the infrared detection result of the infrared detector by the direction detection.

Further, it is preferable that the imaging direction switching unit changes the ratio of the lower time to the upper time in the posture changing process, and the lower time is such that the imaging range is set in advance in the plurality of directions. The direction in the lower side of the lower side of the direction is such that the aforementioned imaging range is directed to a direction belonging to the upper side of the upper side of the aforementioned lower side range.

According to this configuration, it is possible to change the ratio of the imaging range toward the time below the side in the range of the lower side of the lower side and the time of the upper side in the direction of the upper side of the upper side of the lower side. When a person stands in front of the door, the height of the eye depends on the height of the person. Therefore, it is necessary to make the imaging range face upward when the eyes of the user who is taller are photographed, and the imaging range is directed downward when the eyes of the user who is short are photographed. Therefore, when the present iris authentication device is used, it is possible to increase the ratio of the upper time to the user who is highly likely to use the authentication, for example, the resident who installs the door, and the number of people who are taller. The situation where the number of short people is higher increases the ratio of the lower side time. In this way, the chance of capturing the user's eyes can be increased, and the average waiting time until iris recognition is found until the user's eyes are found. Between, so you can shorten the average time spent on iris certification.

Furthermore, it is preferable to further include an occupant information receiving unit that receives occupant information indicating the number of adults living in the house where the door is installed and the number of children, and the imaging direction switching unit is based on the occupant information. When the ratio of the number of the aforementioned children to the number of the above-mentioned adults is higher, the ratio of the aforementioned lower side time to the aforementioned upper side time is increased.

According to this configuration, the greater the number of children who are shorter than the adult, the greater the ratio of the lower time to the upper time, that is, the camera in the lower direction is larger, the number of children is smaller, and the upper time is relative to the lower side. The greater the ratio of time, the larger the camera in the upper direction. As a result, the chance of capturing the user's eyes can be increased, and the average waiting time until the user's eyes are found to perform iris authentication can be shortened, so that the average time taken for iris authentication can be shortened. Further, the user can simply shorten the average time taken for the iris authentication by setting the number of adults living in the house where the door is installed and the number of children to the occupant information receiving unit.

Further, the imaging range changing unit that changes the direction of the imaging range along the width direction of the door is further provided.

The position where the person stands in front of the door may be biased toward either side of the door depending on the structure of the door and the condition of the place where the door is placed. Therefore, according to this configuration, the imaging range changing unit can change the direction of the imaging range of the imaging unit along the width direction of the door. In this way, even if the user is standing on either side of the left or right side of the door, The user's eyes can be photographed appropriately.

Further, the handle for gripping by the user is preferably attached to the vicinity of the end portion in the width direction of the first surface of the door, and the direction of the imaging range is directed toward the normal direction of the first surface from which the handle is attached. side.

When the user opens the door, because he wants to grasp the handle, most of them stand on the side of the door that is attached with the handle. Therefore, according to this configuration, the direction of the imaging range is directed in the direction from the normal direction of the front first surface to the side on which the handle is attached, so that even if the user stands on the side of the door to which the handle is attached, Take the user's eyes appropriately.

Further, it is preferable to further include the aforementioned door.

According to this configuration, since the door and the iris authentication device are integrated, the iris authentication can be performed by replacing the door, and the construction of the iris authentication can be easily performed.

Moreover, it is preferable to further include an electronic lock for locking the door, and the authentication processing unit unlocks the electronic lock when the authentication is successful.

According to this configuration, the user can open the door and enter and exit when the iris authentication is successful, so that the safety can be easily improved.

The iris authentication device configured as described above has an effect of easily reducing the cost.

1, 1a, 1b‧‧‧ iris certification device

2‧‧‧

3‧‧‧Photography Department

4‧‧‧ movable mirror (light path bending section)

5, 5b‧‧‧Control Department

6‧‧‧Motor (camera direction switching unit)

8‧‧‧Electronic lock

9‧‧‧Video Range Change Department

21‧‧‧ first side

22‧‧‧ second side

23‧‧‧ first window

24‧‧‧ second window

25, 26‧‧‧Hands

31‧‧‧Photographic components

32‧‧‧Optical system

33‧‧‧Lighting Department

41‧‧‧First mirror (first bend)

42‧‧‧Second mirror (second bend)

51, 51a, 51b‧‧‧ camera processing department

52, 52a‧‧‧Image Processing Department

53‧‧‧Authorization and Processing Department

54‧‧‧Memory Department

55‧‧‧Pose Judgment Department

71, 72‧‧‧ cold mirror

81‧‧‧Lock

91, 92‧‧‧ Human Body Sensors (Human Detection Department)

93‧‧‧Bolts

94‧‧‧Metal parts

231, 241‧‧ ‧ infrared filter

321‧‧‧ optical axis

322‧‧‧ camera range

411, 412, 413, 421, 422, 423‧‧‧ bends

711, 721‧‧ ‧ reflective surface

712, 722‧‧‧ upper reflective surface

713, 723‧‧‧ lower reflective surface

A‧‧‧Photographing

BD1, BD2‧‧‧ lower range

BU1, BU2‧‧‧ upper range

H‧‧‧Users

K1‧‧‧ iris image

K2‧‧‧ Band data

K3‧‧‧Reversal data

Number of Na‧‧‧ adults

Number of children of Nc‧‧‧

P1‧‧‧ position

P2‧‧‧ central location

P11, P12, P13, P21, P22, P23‧‧‧ pose

SW1, SW2‧‧‧ Rotary switch (resident information receiving department)

TD‧‧‧Lower time

TU‧‧‧Upper time

Fig. 1 is a perspective view showing an example of a configuration of an iris authentication device according to a first embodiment of the present invention.

Fig. 2 is a cross-sectional view taken along line II-II of the door shown in Fig. 1.

Fig. 3 is an explanatory diagram for explaining the relationship between the posture of the movable mirror shown in Fig. 1 and the imaging direction of the imaging unit.

Fig. 4 is a block diagram showing an example of an electrical configuration of the iris authentication device shown in Fig. 1.

Fig. 5 (a) and (b) are explanatory diagrams showing an example of the inversion processing.

Fig. 6 is a cross-sectional view showing an example of a configuration of an iris authentication device according to a second embodiment of the present invention.

Fig. 7 is a block diagram showing an example of an electrical configuration of the iris authentication device shown in Fig. 6.

Fig. 8 is an explanatory diagram for explaining a photographed image taken by the iris authentication device shown in Fig. 6.

FIG. 9 is an explanatory view showing an example of the configuration of the iris authentication device according to the third embodiment of the present invention.

(a) and (b) of FIG. 10 are explanatory diagrams for explaining an imaging range changing unit that changes the imaging range along the width direction of the door.

Fig. 11 is a flow chart showing an example of the operation of the iris authentication device shown in Fig. 9.

Hereinafter, embodiments of the present invention will be described based on the drawings. The same components are denoted by the same reference numerals throughout the drawings, and the description thereof will be omitted.

(First embodiment)

Fig. 1 is a perspective view showing an example of a configuration of an iris authentication device according to a first embodiment of the present invention. The iris authentication device 1 shown in Fig. 1 includes a door 2, an imaging unit 3, a movable mirror 4 (optical path bending unit), a control unit 5, a motor 6 (imaging direction switching unit), and cold mirrors 71 and 72. And an electronic lock 8. The imaging unit 3, the movable mirror 4, the control unit 5, the motor 6, and the electronic lock 8 are housed in the thickness of the door 2. The iris authentication device 1 is not limited to the example in which the door 2 is provided, and the imaging unit 3, the movable mirror 4, the control unit 5, the motor 6, the cold mirrors 71, 72, and the electronic lock 8 may be modularized as an iris. Authentication device 1.

The door 2 has a substantially rectangular plate shape, and is attached to the structure in such a manner that the longitudinal direction thereof is in the vertical direction in the vertical direction. In the first drawing, the vertical direction is indicated by the X direction, that is, the longitudinal direction of the door 2, and the left and right direction, that is, the width direction of the door 2, is indicated by the Y direction.

The door 2 has a first face 21 and a second face 22 along its face. The first surface 21 is a surface facing the outside of a building or a room to which the door 2 is attached, for example, and the second surface 22 is a surface facing the inside of a building or a room to which the door 2 is attached, for example. A door nob 25 is attached to the first surface 21, and a handle 26 is attached to the second surface 22. The first surface 21 may also be a surface facing the inside of a building or room to which the door 2 is attached, for example, and the second surface 22 may be a surface facing the outside of the building or the room to which the door 2 is attached, for example.

In a position substantially at the center in the width direction of the first surface 21 and at a position higher than the center in the vertical direction, for example, a position of a height of a line of sight of a person of an average height is formed with a substantially rectangular opening, and the opening is used as the opening The first window 23. At a position facing the first window 23 of the second surface 22, a second window 24 similar to the first window 23 is formed. The first window 23 is sealed by a cold mirror 71, and the second window 24 is sealed by a cold mirror 72. The cold mirrors 71, 72 are mirrors that allow infrared rays to penetrate and reflect visible light.

A movable mirror 4 is disposed in a space within the thickness of the door 2 sandwiched by the first window 23 and the second window 24. The motor 6 rotates the movable mirror 4 to change its tilt posture. The electronic lock 8 advances and retracts the lock bolt 81 in accordance with the control signal from the control unit 5. In this way, the electronic lock 8 locks or unlocks the door 2. Below the movable mirror 4, an imaging unit 3 and a control unit 5 are disposed.

Fig. 2 is a cross-sectional view taken along line II-II of the door 2 shown in Fig. 1. The illustration of the motor 6 and the electronic lock 8 is omitted in Fig. 2 . The cold mirror 71 is formed with a reflection surface 711 whose normal line faces the horizontal direction, a normal line thereof inclined upward from the normal line of the reflection surface 711, and a reflection surface 712 thereof, and a normal line thereof compared with the reflection surface 711 The normal line is inclined downward to the lower reflecting surface 713. Similarly, the cold mirror 72 is formed with a reflection surface 721 whose normal line is oriented in the horizontal direction, the normal line thereof is inclined upward with respect to the normal line of the reflection surface 721, and the reflection surface 722, and the normal line thereof is compared with the reflection The normal line of the surface 721 is inclined downward to the lower reflecting surface 723.

Therefore, the reflecting surfaces 711, 721 are arranged such that when the person with the average height is standing in front of the door 2, the line of sight will perpendicularly intersect the reflecting surfaces 711, 721, and the upper reflecting surfaces 712, 722 are arranged such that the person with a higher height stands in front of the door 2 from above. When looking down the reflective surface 712, 722, its line of sight will intersect the upper reflecting surface 712, 722 perpendicularly, and the lower reflecting surface 713, 723 will be configured as a child or The shorter person stands in front of the door 2 and looks down at the reflecting surface 713, 723 from the bottom to the bottom. The line of sight will intersect the lower reflecting surface 713, 723 perpendicularly.

The imaging unit 3 includes an imaging element 31 such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor), an optical system 32 that images the imaging element 31, and an optical unit 32. The illumination unit 33 for illumination light for imaging. The optical system 32 is constituted by one or a plurality of optical lenses, and its optical axis extends to the movable mirror 4 in the vertical direction, and the imaging optical path of the imaging unit 3 is bent by the movable mirror 4. Therefore, the imaging range 322 that can be imaged by the imaging unit 3 can be changed in accordance with the posture of the movable mirror 4.

The movable mirror 4 is disposed such that at least a part of the reflection surface of the movable mirror 4 is positioned in the imaging range 322 in order to change the imaging range 322 of the imaging unit 3 . The movable mirror 4 is formed with a reflecting surface on both sides thereof.

Fig. 3 is an explanatory diagram for explaining the relationship between the posture of the movable mirror 4 and the imaging direction of the imaging unit 3 shown in Fig. 1 . As shown in Fig. 3, when the movable mirror 4 is in the posture P11, the optical axis 321 at the center of the imaging range 322 is orthogonal to the reflecting surface 711, and when the movable mirror 4 is in the posture P12, the optical axis 321 and the upper reflecting surface 712 are positive. When the movable mirror 4 is in the posture P13, the optical axis 321 is orthogonal to the lower reflecting surface 713. Therefore, when the movable mirror 4 is in the postures P11, P12, and P13, the imaging unit 3 captures the outer surface of the first window 23, that is, the outer side of the door 2. The postures P11, P12, and P13 correspond to an example of the first posture.

When the movable mirror 4 is in the posture P21, the optical axis 321 is orthogonal to the reflecting surface 721, and when the movable mirror 4 is in the posture P22, the optical axis 321 is inverted. The incident surface 722 is orthogonal, and when the movable mirror 4 is in the posture P23, the optical axis 321 is orthogonal to the lower reflecting surface 723. Therefore, when the movable mirror 4 is in the postures P21, P22, and P23, the imaging unit 3 captures the outer surface of the second window 24, that is, the inner side of the door 2. The postures P21, P22, and P23 correspond to an example of the second posture.

The illumination unit 33 is disposed, for example, in the vicinity of the optical system 32, and emits illumination light toward the movable mirror 4. Therefore, the illumination light emitted from the illumination unit 33 illuminates the outside of the cold mirrors 71, 72 via the same optical path as the optical axis 321 . The illumination unit 33 is configured by an infrared LED (Light Emitting Diode) that emits near-infrared light that penetrates the cold mirrors 71 and 72.

For example, in the outside of the door 2, a user who wants to perform iris authentication in order to unlock the door 2 looks at a reflecting surface that is relatively easy to face in the upper reflecting surface 712, the reflecting surface 711, and the lower reflecting surface 713. The cold mirror 71 reflects visible light, so that, for example, when the user of the average height is facing the reflecting surface 711, his or her own eyes are reflected on the reflecting surface 711. In this manner, the user can reflect his or her own eyes on any of the upper reflecting surface 712, the reflecting surface 711, and the lower reflecting surface 713, and the imaging unit 3 can capture the iris of the user.

In this case, since the upper reflecting surface 712, the reflecting surface 711, and the lower reflecting surface 713 are provided, even users of different heights can reflect their own eyes on the reflecting surface which is easier to see, and the user can be photographed by the imaging unit 3. The iris, so the operation of iris certification will become easier.

Further, the user reflects his/her eyes on any of the upper reflecting surface 712, the reflecting surface 711, and the lower reflecting surface 713, and the illumination light emitted from the illumination unit 33 illuminates the user's iris. Therefore, a good iris image can be taken. Moreover, the illumination light is near-infrared light that is invisible to the human eye, Therefore, users who perform iris certification will not be dazzled.

Fig. 4 is a block diagram showing an example of the electrical configuration of the iris authentication device 1 shown in Fig. 1. The iris authentication device 1 shown in FIG. 4 is configured by connecting the motor 6, the illumination unit 33, the imaging element 31, and the electronic lock 8 to the control unit 5. The control unit 5 is configured to include a CPU (Central Processing Unit) that performs, for example, predetermined calculation processing, a volatile or non-volatile memory, and a peripheral circuit of the CPU and the memory. Further, the control unit 5 functions as the imaging processing unit 51, the image processing unit 52, and the authentication processing unit 53 by executing, for example, a program stored in the non-volatile memory. Further, the control unit 5 is provided with a memory unit 54 composed of, for example, a non-volatile memory. The memory unit 54 stores in advance an authentication reference data such as an image of the user's iris that can be authenticated or a feature data obtained from the iris image.

All or a part of the control unit 5 may be constituted by a dedicated IC (Integrated Circuit) such as an ASIC (Application Specific Integrated Circuit).

The imaging processing unit 51 performs control required to capture the iris of the user who wants to perform iris authentication. Specifically, the imaging processing unit 51 causes the illumination unit 33 to emit light, and drives the motor 6 to operate, so that the movable mirror 4 is periodically changed to the postures of the postures P12, P11, P13, P23, P21, and P22, respectively. Each of the postures is output to the image processing unit 52 together with the photographed image captured by the image sensor 31 and the posture information indicating the posture at the time of photographing. The imaging processing unit 51 only needs to move the imaging range 322 in a plurality of directions by the motor 6, and does not necessarily have to move the movable mirror 4 in the postures P12, P11, P13, P23, and P21. Each posture of P22 is stationary. For example, the imaging processing unit 51 may cause the movable mirror 4 to face the imaging range 322 in a plurality of directions via the postures P12, P11, P13, P23, P21, and P22 while the movable mirror 4 is continuously rotated by the motor 6.

The imaging processing unit 51 is not limited to an example in which the movable mirror 4 is periodically changed between the first posture (the postures P12, P11, and P13) and the second posture (the postures P23, P21, and P22). For example, a human body sensor may be disposed on the outer side and the inner side of the door 2, and the posture of the movable mirror 4 may be changed to a posture corresponding to the side touched by the user via the human body sensor. Alternatively, an operation switch is provided on the outer side and the inner side of the door 2, and the posture of the movable mirror 4 is changed to a posture corresponding to the side on which the operation switch is operated by the user. Further, for example, the user's operation on the handles 25, 26 provided on both sides of the door 2 may be detected, and then the posture of the movable mirror 4 may be changed to correspond to the side of the handle 25 or the handle 26 operated by the user. posture.

The image processing unit 52 extracts an image of the iris from the captured image transmitted from the imaging processing unit 51 by a known image recognition technique. The image processing unit 52 determines that the user authenticates outside the door 2 when the image in which the iris image is extracted is an image corresponding to the postures P12, P11, and P13 of the movable mirror 4, based on the posture information. When the image of the image in which the iris is extracted is an image corresponding to the postures P23, P21, and P22 of the movable mirror 4, it is determined that the user performs authentication on the inside of the door 2.

Therefore, even if the imaging unit 3 is provided as one, and the camera is not provided outside and inside the door 2, the iris of the user inside and outside the door 2 can be imaged, and it can be determined that the authenticated user is in The inside of the door 2 is also the outside.

Further, the imaging processing unit 51 may not be configured to generate posture information, and the image processing unit 52 may not determine whether the authenticated user is inside or outside the door 2. It is possible to determine whether the user is inside or outside the door 2 based on the result of the authentication processing by the authentication processing unit 53 which will be described later.

The authentication processing unit 53 performs iris authentication using a known iris authentication technique based on the image of the iris transmitted from the imaging processing unit 51. Specifically, the authentication processing unit 53 is an image of the iris transmitted from the imaging processing unit 51 or the feature data obtained from the image, and an image of the iris or the feature data stored in the storage unit 54. Compared to the right, iris certification.

Here, the image captured by the movable mirror 4 in the postures P11, P12, and P13 on the outer side of the door 2 and the image taken on the inner side of the door 2 in the posture P21, P22, and P23 of the movable mirror 4 are used. The image is reversed 180 degrees up and down. Therefore, when the authentication reference data is generated based on, for example, the image of the iris captured on the inside of the door 2, the image captured on the outside of the door 2 cannot directly use the reference data for authentication. Certification.

Therefore, when the authentication fails, the authentication processing unit 53 performs an inversion process of inverting the image of the iris transmitted from the imaging processing unit 51 up and down, and then reversing the image based on the data obtained by the inversion processing. Certification. The authentication process based on the data that has not been subjected to the inversion processing is referred to as the first authentication, and the authentication processing based on the data after the inversion processing is referred to as the second authentication.

As described above, the authentication processing unit 53 determines that the authentication is successful when the authentication is successful based on either the first authentication of the data that has not been subjected to the inversion processing or the second authentication of the data that has been subjected to the inversion processing. In the case where the authentication fails depending on which material is determined, it is determined that the authentication has failed.

Fig. 5 is an explanatory diagram showing an example of the inversion processing. Fig. 5(a) shows, for example, a process of causing the movable mirror 4 to be an image captured on the outside of the door 2 in the postures P11, P12, and P13, and corresponds to the first authentication. Fig. 5(b) shows, for example, a process of causing the movable mirror 4 to be an image captured on the inside of the door 2 in the postures P21, P22, and P23, and corresponds to the second authentication.

Fig. 5(a-1) shows an image of an eye photographed on the outside of the door 2, and Fig. 5(b-1) shows an image of an eye photographed inside the door 2. In the example shown in FIG. 5, the image of the eye photographed on the outside of the door 2 is an erect image, and the image of the eye photographed inside the door 2 is an inverted image, but it may be a door. The image of the eye photographed on the outside of 2 is an inverted image, and the image of the eye photographed inside the door 2 is an erect image.

Fig. 5 shows an example in which the authentication reference data stored in the memory unit 54 is based on an erect image captured outside the door 2. The authentication reference data stored in the memory unit 54 may be data based on the iris image captured inside the door 2. In the registration method of the authentication reference data, for example, an operation switch for registering is not disposed at a position where the door 2 is closed when the door 2 is closed, and the like, and the control unit 5 is provided by the control unit 5 When the operation switch is operated, the authentication reference is generated based on the iris image captured by the imaging unit 3 on the outside or inside of the door 2. The material is stored in the memory unit 54.

First, the processing of the first authentication shown in FIG. 5(a) will be described. The image processing unit 52 extracts the iris image K1 from the image of the eye shown in Fig. 5(a-1). The authentication processing unit 53 cuts the iris image K1 at a predetermined position P1 and forms a strip shape from the ring shape, and then pulls the both sides of the cut portion of the cut ring outward to form a ring. The strip-shaped data K2 is produced in a strip shape as shown in Fig. 5 (a-2).

In this way, the image corresponding to (1) to (5) of the iris image K1 shown in Fig. 5 (a-1) is in the strip data K2 shown in Fig. 5 (a-2). It will become a row of configurations.

The strip-shaped data K2 may be formed by expanding the iris image K1 into a strip shape, and may be formed by, for example, binarizing the iris image K1 and forming a pattern indicating the characteristics of the iris.

As described above, the strip-shaped material K2 obtained by photographing the user's eyes is stored as the authentication reference material in the memory unit 54, and the authentication processing unit 53 is as shown in Fig. 5 (a-2). The strip data K2 is compared with the certification reference data for the first authentication.

Next, the second authentication will be described. When the image processing unit 52 determines that the user is inside the door 2, that is, the user is determined to be located with respect to the authentication reference data. When the iris image is inverted on the side of the iris image corresponding to the iris image, the second authentication shown in Fig. 5(b) is performed. The authentication processing unit 53 can perform the second authentication only when the first authentication result fails, and the first and second authentications can be performed constantly.

First, the image processing unit 52 extracts the iris image K1 from the image of the eye shown in Fig. 5(b-1). The authentication processing unit 53 cuts the iris image K1 at a predetermined position P1 and forms a strip shape from the ring shape. At this time, the iris image K1 shown in Fig. 5(b-1) is an image which is inverted from the upper and left and right sides of the iris image K1 shown in Fig. 5(b-1), so for example, Fig. 5 The position P1 in (a-1) is on the upper side of the eye, and the position P1 in Fig. 5(b-1) corresponds to the lower side of the eye. Therefore, in the iris image K1 shown in Fig. 5(b-1), the image corresponding to (3) is located at the position P1.

Then, in the same manner as the first authentication, the authentication processing unit 53 generates the strip-shaped material K2 by pulling both sides of the cut portion of the ring cut from the position P1 outward and expanding the ring into a strip shape (5th) Figure (b-2)). Thus, as shown in Fig. 5 (b-2), the strip data K2 is arranged in a row in the order of (3), (4), (5), (1), (2), (3). Information. Therefore, it cannot be used directly against the benchmark data for certification.

Next, the authentication processing unit 53 cuts the strip data K2 from the center position P2, and then interchanges the cut two pieces of information to generate the inverted data K3 (as shown in Fig. 5 (b-3)). . As shown in Fig. 5 (b-3), the inverted data K3 is arranged in a row corresponding to the data of (1) to (5), and is arranged in the same manner as in Fig. 5 (b-2). The strip data K2 is shown in the same configuration. That is, the process of generating the inverted data K3 is substantially equivalent to the process of inverting the iris image K1 by 180 degrees in the vertical direction (X direction) and the horizontal direction (Y direction) perpendicular to the vertical direction. Therefore, compared with the case where the iris image K1 is actually inverted 180 degrees up and down. Reduce the amount of calculation processing.

Of course, in the second authentication, the iris image K1 can be actually reversed 180 degrees up and down.

Next, the authentication processing unit 53 performs the second authentication by comparing the inverted data K3 with the authentication reference data. Thus, by performing the second authentication, the iris authentication can be performed based on the iris image K1 inverted by the movable mirror 4.

If the authentication is successful, the authentication processing unit 53 unlocks the electronic lock 8. In this way, the user who has successfully authenticated can open the door 2. Further, the authentication processing unit 53 is not limited to an example in which the electronic lock 8 is unlocked when the authentication is successful. For example, the authentication processing unit 53 may be configured to repeatedly unlock and lock in a toggle operation every time the authentication is successful. For example, the data for the right eye of the user and the data for the left eye may be stored in the memory unit 54 as the reference material for authentication, and then unlocked when the authentication by the right eye (or the left eye) is successful, and the left side is used. The composition of the lock in the case of successful eye (or right eye) authentication.

Further, the authentication processing unit 53 determines whether the authentication is successful on the first surface 21 side (outside) and the second surface 22 side (inside) of the door 2 in response to which of the first authentication and the second authentication is successful. Which side of the certification is in the middle.

(Second embodiment)

Next, an iris authentication device 1a according to a second embodiment of the present invention will be described. Fig. 6 is a cross-sectional view showing an example of the configuration of the iris authentication device 1a according to the second embodiment of the present invention. Fig. 7 is a view showing an example of the electrical configuration of the iris authentication device 1a shown in Fig. 6. Block diagram. The iris authentication device 1a shown in Figs. 6 and 7 differs from the iris authentication device 1 shown in Figs. 2 and 4 in the following points. In other words, the iris authentication device 1a shown in FIGS. 6 and 7 does not include the motor 6, and includes the first mirror 41 (first bent portion) and the second mirror 42 (second bent portion) instead of the motor. Movable mirror 4. The operations of the imaging processing unit 51a and the image processing unit 52a are also different.

The other configurations are the same as those of the iris authentication device 1 shown in Figs. 2 and 4, and therefore the description thereof will be omitted. Hereinafter, the features of the present embodiment will be described.

The first mirror 41 and the second mirror 42 are fixedly disposed on the optical path of the imaging range of the imaging unit 3. In the example shown in Fig. 6, the first mirror 41 is disposed on the back side of the paper, and the second mirror 42 is disposed on the front side of the paper. The first mirror 41 includes a bent portion 411 that bends the optical path for imaging toward the reflecting surface 711, a bent portion 412 that bends the optical path toward the upward reflecting surface 712, and a direction in which the optical path is deflected toward the reflecting surface 713. The curved portion 413. The second mirror 42 includes a bent portion 421 that bends the optical path for imaging in the direction of the reflecting surface 721, a bent portion 422 that bends the optical path toward the upward reflecting surface 722, and a direction in which the optical path is deflected toward the reflecting surface 723. The curved portion 423.

Fig. 8 is an explanatory diagram for explaining a captured image taken by the iris authentication device 1a shown in Fig. 6. In the iris authentication device 1a, the images G711, G721, G712, G722, G713, and G723 of the eyes captured by the respective reflecting surfaces of the reflecting surfaces 711, 721, the upper reflecting surfaces 712, 722, and the lower reflecting surfaces 713, 723 are arranged in the captured image A. Different location.

The imaging processing unit 51a is different from the imaging processing unit 51 in that the motor 6 is not driven and the posture information is not generated. Other points are with the camera Since the processing unit 51 is the same, the description thereof will be omitted.

The image processing unit 52a differs from the image processing unit 52 in determining whether the user authenticates outside or inside the door 2 based on the position at which the iris image is extracted from the captured image A. The other points are the same as those of the image processing unit 52, and the description thereof will be omitted.

According to the iris authentication device 1a, since the movable mirror 4 and the motor 6 can be omitted, the durability of the iris authentication device 1a is improved by reducing the movable portion.

Further, in the case of the first bent portion and the second bent portion, an example in which a mirror is used is disclosed, but the first bent portion and the second bent portion may be formed by using a crucible. Further, although it is disclosed that the cold mirrors 71, 72 are provided with a plurality of reflecting surfaces 711, 721, upper reflecting surfaces 712, 722, and lower reflecting surfaces 713, 723, there may be only one reflecting surface, for example, only reflecting surfaces 711, 721. In this case, the movable mirror 4 may be configured to take the posture P11 and the posture P21.

Further, the cold mirrors 71 and 72 may not be provided. For example, the first window 23 and the second window 24 may be sealed by transparent glass, or the first window 23 and the second window 24 may be openings.

Further, the iris authentication device 1 may not include the second window 24 and the cold mirror 72 in the first, second, and third figures, or the imaging processing unit 51 may use the motor 6 in the third image (the imaging direction). The switching unit changes the posture of the movable mirror 4 to each of the postures P12, P11, and P13, but does not change the posture of the movable mirror 4 to the postures of P23, P21, and P22.

Moreover, the iris authentication device 1a may also be: at the sixth, seventh The second window 24, the second mirror 42 (second bent portion), and the cold mirror 72 are not provided in the drawing.

(Third embodiment)

Next, an iris authentication device according to a third embodiment of the present invention will be described. Fig. 9 is a cross-sectional view showing an example of the configuration of the iris authentication device 1b according to the third embodiment of the present invention. The iris authentication device 1b shown in Fig. 9 is further provided with human body sensors 91, 92 (human body detecting unit), rotary switches SW1 and SW2 (occupant information receiving unit), and imaging. The imaging range of the unit 3 can be changed along the width direction of the door 2 by the imaging range changing unit 9, and the infrared ray filters 231 and 241 are provided instead of the cold mirrors 71 and 72, and the control unit 5b is provided. The configuration is different from the iris authentication device 1 shown in FIG. The control unit 5b is different from the control unit 5 in that it also functions as the posture determining unit 55 and in the operation of the imaging processing unit 51b.

The other configurations are the same as those of the iris authentication device 1 shown in Fig. 3, and therefore the description thereof will be omitted. Hereinafter, the features of the present embodiment will be described.

The infrared filters 231, 241 are optical filters that allow infrared rays emitted from the human body to penetrate and reduce visible light. The infrared filter 231 is attached to the first window 23 (outward window), and the infrared filter 241 is attached to the second window 24 (inward window). Further, the infrared filters 231 and 241 may not be provided, or the cold mirrors may be provided instead of the infrared filters 231 and 241. Alternatively, an infrared filter may be disposed at the front end of the optical system 32 instead of providing the infrared filters 231, 241 in the first window 23 and the second window 24. practice.

The human body sensors 91, 92 are sensors for detecting the person, and detect whether or not a person exists within the detection range by detecting, for example, infrared rays emitted from the human body. The detection range of the human body sensor 91 is set to be on the first surface 21 side of the door 2, that is, a predetermined distance outside the door, for example, in the range of 1 to 3 meters. Therefore, when the human body sensor 91 is approached outside the door 2, a person is detected. The detection range of the human body sensor 92 is set to be on the second face 22 side of the door 2, that is, a predetermined distance inside the door 2, for example, in the range of 1 to 3 meters. Therefore, the human body sensor 92 detects a person when the inside of the door 2 is approached.

Therefore, when a person appears in the imaging range that can be imaged by the imaging unit 3 as the posture of the movable mirror 4 changes, the human body sensor 91, 92 detects a person and outputs the detection signal to the control unit. 5b.

The rotary switches SW1, SW2 are operable from, for example, the front end face (front face) of the door 2. Therefore, the rotary switches SW1, SW2 can be operated only when the door 2 is opened. The rotary switch SW1 is a setting switch for accepting the setting of the number of adults Na, and can set a number such as 1 to 5. The rotary switch SW2 is a setting switch for accepting the setting of the number Nc of children, and can set a number of, for example, 1 to 5. The occupant information indicating the number of adults living in the family in which the door 2 is installed and the number of children is set by the rotary switches SW1 and SW2.

The so-called adults and children in this case roughly grasp the distinction made by the occupants from the viewpoint of the size of the body. For example, the so-called adult refers to a person with a larger body and means, for example, about 15 years old or older. So-called A child is a person with a smaller body and means, for example, less than about 15 years old.

As described above, the rotary switches SW1 and SW2 are disclosed as an example of the occupant information receiving unit, but the occupant information receiving unit is not limited to the setting switch. For example, the occupant information receiving unit may be a wired or wireless communication interface circuit that receives the number of adults Na and the number Nc of children from the external terminal device.

FIG. 10 is an explanatory diagram for explaining an imaging range changing unit that changes the imaging range along the width direction of the door. Fig. 10(a) shows an example in which the handle 25 is attached near the right end of the door 2, and Fig. 10(b) shows an example in which the handle 25 is attached near the left end of the door 2. Fig. 10 shows an example in which the imaging range 322 is only on the first surface 21 side (outer side) of the door 2 and the second surface 22 is not provided for simplification of description.

In the example shown in FIG. 10, the imaging range changing unit 9 is composed of a bolt 93 inserted from the second surface 22 side (inside) in the thickness direction of the door 2 and a metal member 94 attached to one end of the movable mirror 4. . A nut that moves in the thickness direction of the door 2 as the bolt 93 rotates is screwed to the bolt 93. The metal member 94 is engaged with the nut.

Therefore, the user rotates the bolt 93 with a screwdriver, and the metal member 94 moves in the thickness direction of the door 2. As a result, the movable mirror 4 is rotated in the horizontal direction, and the imaging range 322 is changed along the width direction (horizontal direction) of the door 2.

The handle 25 is attached to the vicinity of the right end portion of the door 2 as shown in Fig. 10(a), and is attached to the vicinity of the left end of the door 2 as shown in Fig. 10(b). Thus, the user who wants to open the door 2 is H It will stand on the side close to the handle 25, so in most cases, the iris is authenticated at a position deviating from the center of the width direction of the door 2. Therefore, if the imaging range 322 of the imaging unit 3 is directed from the center position in the width direction of the door 2 toward the normal direction of the door 2, the eyes of the user H do not enter the imaging range 322.

In addition, in the habit of manufacturing and distribution, the door 2 first manufactures a semi-finished product in which the handle 25 is not attached, and stores and circulates in this state, and then mounts the handle 25 to the right side when there is an actual order or to be installed to the dwelling. Or on the left. Therefore, at the stage where the semi-finished product of the handle 25 is not attached, it is difficult to provide the imaging unit 3 and the first window 23 at a position close to the handle 25 in advance.

On the other hand, as shown in FIG. 10, the imaging range changing unit 9 in which the direction of the imaging range 322 can be changed along the width direction of the door 2 is provided, and the handle 25 can be attached to the door of the semi-finished product in the future, and the imaging can be performed. The direction of the range 322 is oriented in the direction in which the handle 25 is mounted. Therefore, the imaging unit 3 and the first window 23 can be provided substantially at the center in the width direction of the door 2 at the stage where the handle 25 is to be mounted on the left and right side of the semi-finished product, regardless of the side on which the handle 25 is mounted. Can respond. Then, after the mounting position of the handle 25 is determined in the future, as shown in FIGS. 10(a) and 10(b), the imaging range changing unit 9 causes the direction of the imaging range 322 to face the direction in which the handle 25 is attached. The direction of the imaging range 322 can be oriented in a direction in which the iris of the user H can be easily photographed regardless of whether the handle 25 is attached to the left or right side of the door 2.

Although FIG. 10 shows an example in which only the imaging range 322 is on the first surface 21 side (outside) of the door 2, it may be as shown in FIG. The imaging area 322 is also provided on the second surface 22 side (inner side). In this case, the imaging range changing unit 9 can be configured to drive the first surface 21 side (outside) or the second surface 22 side (inside) by, for example, a motor and a gear mechanism. The movable mirror 4 has a configuration in which the direction of the imaging range 322 is directed in a direction in which the handle 25 or the handle 26 is attached.

Next, the configuration of the imaging processing unit 51b, the posture determination unit 55, and the operation of the features of the iris authentication device 1b will be described.

The imaging processing unit 51b starts the posture changing process when at least one of the human body sensors 91 and 92 detects a human body. The posture changing process is a process of rotating the motor 6 to rotate the movable mirror 4 in the counterclockwise direction of the paper surface of Fig. 9, for example. Thereby, the imaging range 322 of the imaging unit 3 is scanned in the vertical direction by the upper side range BU1 and the lower range BD1 facing the door 2, and the upper side range BU2 and the lower side BD2 facing the door 2 in the vertical direction. The way it changes. During the scanning process, the imaging range 322 is sequentially directed to a plurality of directions.

The movable mirror 4 is attached to the door 2 at a position of, for example, about 140 cm from the height of the floor, at which position (hereinafter referred to as a horizontal position) bends the optical axis 321 to extend horizontally. The upper side range BU1, BU2 is higher than the horizontal position, and the lower side range BD1, BD2 is lower than the horizontal position.

The horizontal position is about 140 cm from the floor, and when a typical Japanese adult female stands in front of the door 2, it naturally becomes a posture in which the line of sight looks down at the first window 23 or the second window 24. In this way, when the user standing in front of the door 2 is an adult, the user's eyes are located. The probability of the upper range BU1, BU2 will become higher, and when the user standing in front of the door 2 is a child, the user's eyes are located in the lower range BD1, and the probability of BD2 becomes higher.

In the posture changing process, the imaging processing unit 51b determines the direction in which the imaging range 322 is directed to the lower range BD1, BD2 based on the number Na of the adults set in the rotary switch SW1 and the number Nc of children set in the rotary switch SW2. The lower side time TD is such that the imaging range 322 is oriented toward the time TU above the direction of the upper side of the upper side range BD1, BD2 in the upper side range BU1, BU2.

Specifically, the imaging processing unit 51b has a higher ratio of the number Nc of children to the number Na of adults, and the ratio of the lower time TD to the upper time TU is larger. More specifically, the ratio of the upper side time TU to the lower side time TD is determined such that TD/TU = Nc / Na, and the rotational speed of the motor 6 is controlled to be the ratio. For example, when the ratio of the upper time TU is high, the imaging processing unit 51b lowers the rotational speed of the motor 6 when scanning the upper range BU1, BU2, and when the ratio of the lower time TD is high, the lower range BD1, BD2 is scanned. The rotational speed of the motor 6 at the time is lowered. That is, the motor 6 can change the ratio of the upper time TU to the lower time TD in accordance with the set values of the rotary switches SW1 and SW2.

In the posture changing process, the imaging processing unit 51b causes the imaging unit 3 to image at a predetermined time interval regardless of the upper time TU and the lower time TD while changing the direction of the imaging range 322. Therefore, one cycle of the movable mirror 4 is rotated, or one cycle of the upper side range and the lower side range is scanned from one end to the other end. In the case, increasing the ratio of the upper time TU increases the probability that the eyes of the adult can be photographed, and increasing the ratio of the lower time TD increases the probability that the child's eyes can be photographed.

The posture determination unit 55 determines whether or not a human eye is captured in the captured image by using a known image processing technique each time an image is captured by the imaging unit 3.

When the posture determination unit 55 determines that the image captured by the imaging unit 3 has an eye of a person, the imaging processing unit 51 stops the motor 6 and stops the imaging range 322 at the position, and then ends the posture change. deal with. When the human eye is photographed in the image captured by the imaging unit 3, since the line of sight of the user H enters the imaging range 322, the scanning of the imaging range 322 is stopped in this state. The image capturing unit 3 is maintained to capture the state of the eyes of the user H.

In this state, the imaging processing unit 51b causes the imaging unit 3 to capture the eyes of the user H, and outputs the image to the image processing unit 52. Thereafter, the image processing unit 52 and the authentication processing unit 53 perform the same image processing and iris authentication as described above.

Fig. 11 is a flowchart showing an example of the operation of the iris authentication device 1b shown in Fig. 9. First, the imaging processing unit 51b checks whether the human body sensor 91 or the human body sensor 92 detects the human body (step S1). For example, if the user H stands on the first side 21 side (outside) of the door 2, the human body sensor 91 detects the human body (the result of step S1 is YES), and the imaging processing unit 51b performs The operation of the number of adults Na and the number Nc of children is read from the rotary switches SW1 and SW2 (step S2).

Next, the imaging processing unit 51b starts the posture changing process to determine the ratio of the upper time TU to the lower time TD by TD/TU=Nc/Na, and controls the rotational speed of the motor 6 to the ratio (step S3). ).

According to steps S1 and S3, the human body sensor 91 or the human body sensor 92 detects that the human body is present, that is, when a person stands in front of the door 2, the posture changing process is started to rotate the motor 6. Therefore, it is not necessary to drive the motor 6 all the time, so the power consumption of the motor 6 is reduced. Moreover, since the cumulative driving time of the motor 6 is reduced, the wear and deterioration of the motor 6 are reduced.

Next, the imaging processing unit 51b causes the imaging unit 3 to capture an image (step S4). Then, the posture determination unit 55 determines whether or not an image of an eye is included in the captured image captured by the imaging unit 3 (step S5). If the image of the eye is not included in the captured image (the result of step S5 is "NO"), the eye of the user H does not enter the imaging range 322. Therefore, the imaging processing unit 51b continues to perform the imaging and determination of steps S4 and S5 at predetermined time intervals at a predetermined time interval while continuing to rotate the motor 6, thereby finding the eyes of the user H.

On the other hand, if the image of the eye is included in the captured image (YES in step S5), the eye of the user H has entered the imaging range 322 and the iris authentication is possible. Therefore, the imaging processing unit 51b ends the posture changing process to stop the motor 6, and causes the imaging unit 3 to capture an image (step S6).

Therefore, since the imaging unit 3 is imaged while the movable mirror 4 is stopped, it is easy to make the captured image unblurred. (blur) a sharp image. As a result, a sharp captured image is obtained, and the accuracy of the iris authentication performed by the authentication processing unit 53 is improved. Further, when the human body sensor 91, 92 detects that there is a human body, the motor 6 starts to rotate, and when the user's eyes are photographed ("YES" in step S5), the motor 6 is stopped, so that The motor 6 is stopped during a period that is not required for iris authentication. Therefore, the power consumption of the motor 6 is reduced. Moreover, since the cumulative driving time of the motor 6 is reduced, the wear and deterioration of the motor 6 are reduced.

Next, the image processing unit 52 extracts an iris image from the captured image captured by the imaging unit 3 (step S7), and the authentication processing unit 53 performs iris authentication (step S8). Then, when the authentication is successful (YES in step S9), the authentication processing unit 53 unlocks the electronic lock 8 (step S10), and then ends the processing. On the other hand, if the authentication has failed (NO in step S9), the authentication processing unit 53 ends the processing without unlocking the electronic lock 8. Therefore, the unlocking of the door 2 can be performed by iris authentication, so that the safety of the door 2 can be improved.

Here, in step S3, the ratio of the upper time TU to the lower time TD is determined such that TD/TU = Nc/Na, and the rotation speed of the motor 6 is controlled so that the ratio becomes the ratio.

In this way, if there is a large number of family members living in the house where the door 2 is installed, the upper time TU will be long, and the scanning time and the height of the adult will correspond to the upper side range BU1, and the time of BU2 will become longer in one cycle. In terms of the family composition in which the number of adults is large, the probability of performing iris authentication in order to open the door 2 is higher than that of the child. So according to the steps In S3, when the number of people who are set by the rotary switches SW1 and SW2 is larger than the number Nc of the number of children, the scanning time and the height of the adult are longer than the upper range BU1 and BU2. As a result, it is possible to increase the chance of photographing an adult's eyes for a family with a large number of adults, and can shorten the average waiting time until iris recognition is obtained until an adult's eyes are found, and the average cost of iris authentication can be shortened. time.

On the other hand, if there is a large number of children who live in the house where the door 2 is installed, the lower time TD will be longer, and the time of the lower side range BD1, BD2 will be scanned in the same period as the height of the child. lengthen. In the case of a family composition in which the number of children is large, the probability of performing iris authentication in order to open the door 2 is higher for children than for adults. Therefore, in the case where the number of children Nb set by the number of children is greater than the number Na of the adults, the scanning is made longer than the height of the child in the upper range BD1, BD2. As a result, it is possible to increase the chance of photographing the child's eyes for the family having a large number of children, and shorten the average waiting time until iris recognition is obtained until the child's eyes are found, and the average time taken for iris authentication can be shortened. .

Further, although the above is an example of performing iris authentication in steps S7 and S8 by using the captured image captured in the state where the movable mirror 4 is stopped in step S6, the image may not be captured in step S6 but may be used instead. In step 5, it is determined that the captured image of the eye is included to perform iris authentication in steps S7 and S8. In this way, it is possible to perform iris authentication based on the captured image of the iris having the eye.

Further, although the above is disclosed, the posture determining unit 55 is based on An example of whether or not an eye of a person is detected in the imaging range 322 is captured in the captured image, but the method of determining whether or not there is a human eye in the imaging range 322 is not limited to this example. For example, the infrared detecting unit for detecting the direction of the infrared rays emitted from the human body and having the directivity in the detection direction may be provided, and the imaging processing unit 51b may be used for detecting the direction by using a gear mechanism or the like that is interlocked with the motor 6. The infrared ray detecting unit is directed toward the imaging range 322 in response to the change in the posture of the movable mirror 4 by the motor 6, and the posture determining unit 55 determines whether or not there is an eye in the imaging range 322 based on the infrared detection result of the direction detecting infrared detecting unit. .

Usually, when a person is wearing clothes, the face (head) and parts other than both hands are covered by the clothes. Therefore, the infrared rays emitted from the face (head) and parts other than the hands are covered by the clothes. Moreover, the area of the face is larger than the hand, so the infrared rays emitted by the human body are the most abundantly emitted by the face.

Therefore, when the infrared detecting unit detects the infrared rays corresponding to the infrared radiation from the face of the person, the direction of detection of the infrared detecting unit in the direction detecting unit, that is, the direction of the imaging range 322 can be detected. Face and eyes. Therefore, it is possible to determine whether or not there is a person's eyes in the imaging range 322 of the imaging unit 3 based on the direction of the infrared detection result of the infrared detecting unit. It is also possible to determine whether or not there is a person's eyes in the imaging range 322 of the imaging unit 3 by detecting the infrared detection unit for the plurality of direction detections and detecting the infrared detection amount obtained by the infrared detection unit in each direction.

1‧‧‧Iris certification device

2‧‧‧

3‧‧‧Photography Department

4‧‧‧ movable mirror (light path bending section)

5‧‧‧Control Department

6‧‧‧Motor (camera direction switching unit)

8‧‧‧Electronic lock

21‧‧‧ first side

22‧‧‧ second side

23‧‧‧ first window

24‧‧‧ second window

25, 26‧‧‧Hands

71, 72‧‧‧ cold mirror

81‧‧‧Lock

711, 721‧‧ ‧ reflective surface

712, 722‧‧‧ upper reflective surface

713, 723‧‧‧ lower reflective surface

Claims (26)

An iris authentication device comprising: a first window having a first surface and a second surface along a plate surface; a first window formed on the first surface; and a plate having a second window formed on the second surface; The image is captured and received between the first surface and the second surface of the door, and the optical axis of the optical system for imaging is directed toward the imaging unit extending in the direction of the plate surface; The first surface and the second surface are disposed in an imaging range of the imaging unit, and the imaging optical path is bent in the first window direction and the second window direction to thereby form the imaging unit. An optical path bending portion that captures an outer side of the first window or an outer side of the second window; and an authentication processing unit that performs iris authentication based on the captured image captured by the imaging unit. An iris authentication device is mounted on a plate-shaped door having a first surface and a second surface along a plate surface, and a first window is formed on the first surface, and the second surface is formed on the second surface There is a second window, the iris authentication device includes: capturing an image and being housed between the first surface and the second surface of the door, and an optical axis of the optical system for imaging An imaging unit extending in a direction of the plate surface; disposed between the first surface and the second surface in an imaging range of the imaging unit, and bending the optical path for imaging to the first a window direction and the second window direction, whereby the imaging unit captures an optical path bending portion outside the first window or outside the second window; and based on a captured image captured by the imaging unit Iris Certification Certification Processing Department. The iris authentication device according to claim 1 or 2, wherein the optical path bending portion is disposed on the optical path and configured to be in a first posture in which the optical path faces the first window direction The iris authentication device further includes: changing the posture of the movable mirror to change the posture of the movable mirror, thereby causing the imaging unit to capture the first window; and the movable mirror that changes the posture between the second posture in the second window direction An imaging direction switching unit on the outer side or the outer side of the second window. The iris authentication device according to claim 3, wherein the imaging direction switching unit causes the movable mirror to periodically change a posture between the first posture and the second posture. The iris authentication device according to claim 3, wherein the door system has a predetermined vertical direction when vertically arranged as a door and window structure, and the imaging direction switching unit is configured by the first and second In the posture, the imaging range is such that the outer sides of the first window and the second window are oriented in a plurality of directions along the vertical direction. The posture of the movable mirror is changed, and the imaging unit captures images in the plurality of directions on the outer sides of the first window and the second window. The iris authentication device according to claim 1 or 2, wherein the optical path bending portion includes: a first bent portion disposed on the optical path, the optical path being bent toward the first window direction, and The optical path is bent toward the second bent portion in the second window direction. The iris authentication device according to claim 6, wherein the door system has a predetermined vertical direction when vertically arranged as a door and window structure, and the first bent portion and the second bent portion respectively include The imaging range is directed to a plurality of bent portions in a plurality of directions arranged along the vertical direction with respect to the outer sides of the first window and the second window. The iris authentication device according to claim 6 or 7, wherein the first bent portion and the second bent portion are changed in a direction of the optical path by a mirror or a cymbal. The iris authentication device according to claim 5, wherein the first window and the second window are cold mirrors having a plurality of reflecting surfaces extending in a direction intersecting the plurality of directions respectively Sealed. Iris certification as described in any one of claims 1 to 9 In the device, the authentication processing unit performs the first authentication based on the iris image included in the captured image and the inverse of the iris image in the vertical direction and the horizontal direction by 180 degrees. Transfer the second certification of the data. The iris authentication device according to claim 10, wherein the authentication processing unit sets the ring at a predetermined position on the ring-shaped image of the iris obtained from the captured image in the first authentication. Cutting, and then pulling the sides of the cut ring outward to form the strip into a strip shape, and performing the identification according to the strip data, and in the second authentication, For the annular image of the iris obtained from the photographic image, the ring is cut at the predetermined position, and then the sides of the cut ring are pulled outward to expand the ring into a strip shape. The strip-shaped data is generated, and the strip-shaped data is cut at the central position in the longitudinal direction of the strip, and then the two pieces of the cut data are interchanged and connected to generate the inverted data, and the inverted data is used according to the inverted data. Certification. The iris authentication device according to claim 10, wherein the authentication processing unit determines that the iris authentication is successful when any of the first authentication and the second authentication is successful. The iris authentication device according to any one of claims 10 to 12, wherein the authentication processing unit determines that the authentication is correct in response to the successful authentication of the first authentication and the second authentication. Authentication on which of the first surface side and the second surface side of the door. An iris authentication device is mounted on an iris authentication device having a plate-shaped door having a first window along a first surface and a second surface of the plate surface and having a first window formed on the first surface, and is configured to image an image And an imaging unit housed between the first surface and the second surface of the door; disposed between the first surface and the second surface in an imaging range of the imaging unit, The optical path of the imaging is bent in the first window direction, whereby the imaging unit captures the optical path bending portion outside the first window; and performs authentication processing of the iris authentication based on the captured image captured by the imaging unit. The door system has a predetermined vertical direction when vertically arranged as a window structure, and the optical path bending portion causes the imaging range to face a plurality of directions along the outer side of the first window in the vertical direction. . The iris authentication device according to claim 14, wherein the optical path bending portion is disposed on the optical path and configured to move the optical path in a plurality of directions along the vertical direction The iris authentication device further includes: changing the posture of the movable mirror to change the posture of the movable mirror toward the outer side of the first window in the vertical direction Way of change Further, in the imaging direction switching unit that is in the posture of the movable mirror, the imaging unit captures an image in the plurality of directions on the outer side of the first window. The iris authentication device according to claim 14, wherein the optical path bending portion includes: disposed on the optical path, and the imaging range is arranged in a plurality of directions along the outer side of the first window toward the vertical direction Multiple bends in one direction. The iris authentication device according to claim 5, wherein the imaging direction switching unit performs a posture changing process of changing the posture of the movable mirror so that the imaging range is sequentially directed to the plurality of directions. Further, the iris authentication device further includes: a posture determination unit that determines whether or not a person is present in an imaging range of the imaging unit that changes in a posture of the movable mirror; and the posture determination unit determines that the image is within the imaging range In the case of the aforementioned eye, the imaging processing unit that stops the posture change performed by the imaging direction switching unit is stopped. The iris authentication device according to claim 17, wherein the imaging unit sequentially captures images in the plurality of directions in response to a change in posture of the movable mirror, and the posture determination unit is configured by the imaging unit When the image is captured, whether or not there is a human eye in the image capturing range is determined depending on whether or not a human eye is captured in the captured image. The iris authentication device according to claim 17 or 18, further comprising: a human body detecting unit for detecting a human body in a plurality of imaging ranges corresponding to the plurality of directions, wherein The imaging direction switching unit starts the posture changing process based on the human body detection result of the human body detecting unit. The iris authentication device according to the seventeenth aspect of the invention, further comprising: an infrared detecting unit for detecting a direction of directivity of the infrared rays emitted from the human body and having a directivity in the detection direction, wherein the imaging direction switching unit is associated with The attitude change unit is configured to determine whether the detection direction is in the direction of the imaging range, and the posture determination unit determines whether or not there is a person in the imaging range of the imaging unit based on the detection result of the infrared ray by the direction detecting infrared detector. s eyes. The iris authentication device according to any one of the aspects of the present invention, wherein the imaging direction switching unit is configured to change a ratio of a lower time to an upper time, the lower time And the image capturing range is directed to a direction in a range of a lower side of the lower side in the up-and-down direction, wherein the image capturing range is oriented toward an upper side of the upper side of the lower range. The direction in the range. The iris authentication device according to claim 21, further comprising: an occupant information receiving unit that accepts occupant information indicating the number of adults living in the house where the door is installed and the number of children, the photographing direction The switching department is based on the aforementioned occupant information. When the ratio of the number of the aforementioned children to the number of the above-mentioned adults is higher, the ratio of the aforementioned lower side time to the aforementioned upper side time is increased. The iris authentication device according to any one of claims 1 to 22, further comprising: an imaging range changing unit that changes a direction of the imaging range along a width direction of the door. The iris authentication device according to any one of claims 1 to 23, wherein a handle for gripping by a user is attached to an end portion of the first surface of the door in the width direction, the aforementioned imaging range The direction of the direction is offset from the normal direction of the first surface toward the side on which the handle is attached. The iris authentication device according to any one of claims 1 to 24, further comprising the aforementioned door. The iris authentication device according to any one of claims 1 to 25, further comprising: an electronic lock for locking the door, wherein the authentication processing unit causes the electronic lock when the authentication is successful Unlock.