JP2009138490A - Door device and door system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To photograph visitors' face images from a tall visitor to a short visitor with one camera and to photograph bioinformation such as the visitors' face images of excellent quality. <P>SOLUTION: A door device is provided with a bioinformation reader support part 3 supporting a bioinformation reader 4 and moving the bioinformation reader 4 to the center part of a door 2 when the door 2 is closed and moving the bioinformation reader 4 to the side part of the door 2 when the door 2 is open. The front face image of the visitor who is moving toward the door 2 can be photographed by the bioinformation reader 4 moved to the center part of the door 2 when the door 2 is closed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a door device and a door system that include a camera that acquires biometric information such as a face image, and that performs biometric authentication that confirms the identity of the person based on the biometric information and controls opening and closing of the door.

Conventional door devices and door systems are equipped with a camera that captures the face image of a person who is about to enter in the vicinity of the entrance of a common gate or building, and the face image captured by the camera is collated with the face image of the registrant. Biometric authentication is performed, and admission is permitted based on the result (see, for example, Patent Document 1).
In such a conventional door device and door system, as shown in FIG. 8, in order to improve the accuracy of biometric authentication, shooting is performed from the front of the visitor, and the progress of the visitor so as not to disturb the passage of the visitor The camera 100 is installed in the vicinity of the door 101 so as to be perpendicular to the direction (direction indicated by the arrow B). In this case, the attendant adjusts the height and angle of the face so that the face is positioned in front of the camera 100 according to his / her height.

Also, in order to eliminate the need for an attendee to adjust the height and angle of the face so that the face is positioned in front of the camera in accordance with his / her height, a plurality of cameras 100 are vertically arranged as shown in FIG. It is set up to capture the face images of visitors.
Furthermore, as shown in FIG. 10, a single camera 100 is placed near the door 101 toward an approaching visitor, and the height and angle of the face are adjusted by increasing the distance to the subject attendee. That makes it unnecessary.
JP 2006-309490 A (paragraphs “0016” to “0025”, FIGS. 1 and 3)

  However, in the conventional technique described above, when the camera 100 is installed near the door 101 so as to be perpendicular to the direction of travel of the visitors, the subject from the camera 100 as shown in FIG. Because the distance to the visitors is extremely short, it is necessary for high-height visitors to bend according to the height of the camera, and for users who do not fit within the angle of view of the camera to use this system There is a problem that can not be.

Also, as shown in FIG. 11B, when a plurality of cameras 100 are installed in the vertical direction according to the height of the attendee, the above problem can be solved, but complicated mechanisms and controls are required. In addition, there is a problem that the apparatus becomes expensive.
Furthermore, when the camera 100 is installed in the vicinity of the door 101 toward an approaching visitor as shown in FIG. 11C, the distance from the camera 100 to the attendee can be increased so that one camera 100 can Although it is possible to shoot face images of visitors regardless of their height, it is necessary to perform biometric authentication because the approaching visitors are photographed obliquely from the front as shown in FIG. There is a problem that the quality of the face image cannot be obtained and the accuracy of biometric authentication is lowered. In addition, there is a problem that much time is required for the biometric authentication process even when the threshold for fluctuation of the captured face image is adjusted to perform biometric authentication.

  An object of the present invention is to solve such problems, so that a single face camera can capture a face image having a quality sufficient for performing biometric authentication regardless of the height of a visitor. The task is to do.

  Therefore, the present invention provides a door device having a biometric information reader that reads a face image of a visitor as biometric information, and a door that is opened and closed based on the result of biometric authentication performed using the biometric information read by the biometric information reader. The biological information reader that supports the biological information reader and moves the biological information reader to the vicinity of the center of the door when the door is closed, and moves the biological information reader to the side of the door when the door is opened A support part is provided, and when the door is closed, the biological information reader moved to the vicinity of the central part of the door can be used to shoot a biological information image from the front including the face image of the visitors heading to the door. Features.

According to the present invention as described above, it is possible to capture biometric information such as a face image of a visitor with a short height from a tall visitor with a single camera.
In addition, it is possible to capture biometric information such as a face image of an entering visitor from the front, and to capture biometric information such as a face image of a visitor with good quality when performing biometric authentication. The effect of being able to do is obtained.

  Hereinafter, embodiments of a door device and a door system according to the present invention will be described with reference to the drawings.

1 is a plan view showing a configuration of a door system in the embodiment, FIG. 2 is a front view showing a configuration of the door system in the embodiment, and FIG. 3 is a side view showing a configuration of the door system in the embodiment.
In the figure, reference numeral 1 denotes an entrance door, which is a door provided at the entrance of the door system. The entrance door 1 is opened when an approach of a visitor is detected by a proximity sensor composed of an ultrasonic sensor or the like (not shown) so that the visitor can enter the door system. The entrance door 1 is composed of two plate-like door plates, and each door plate is rotatably supported by support columns provided on both sides of the entrance of the door system.

Reference numeral 2 denotes an exit door, which is a door provided at the exit of the door system. The exit door 2 is opened when the face of the entrant who has entered through the opened entrance door 1 is photographed with a camera, and it is determined that biometric authentication is performed on the face image. This is to allow the person to pass.
Reference numeral 3 denotes a camera arm (biological information reader support unit) provided above the exit door 2, and reference numeral 4 denotes a camera as a biometric information reader placed on the camera arm 3. The camera 4 is composed of a camera with a CCD (Charge Coupled Devices) or the like, and captures a face of a visitor who enters from the opened entrance door 1 to acquire a face image (image data) as biometric information. It is.

Reference numeral 5 denotes a side panel for forming a side surface between the entrance door 1 and the exit door 2 to prevent unauthorized entry and exit of visitors. Accordingly, the side panel 5 forms a passage 7 that guides the visitors who enter from the entrance door 1 to the exit door 2, and guides the visitors to advance in the direction indicated by the arrow A in the figure.
A door device 6 controls the entrance door 1, the exit door 2, the camera arm 3, and the camera 4. The door device 6 detects the approach of the visitor, releases the entrance door 1 to guide the visitor to the passage 7 and captures the visitor's face with the camera 4 to obtain a face image of the visitor. When the person can be confirmed from the acquired face image, the exit door 2 is opened to allow the passage of the visitors. The configuration of the door device 6 will be described later.

Here, the configuration of the camera arm 3 on which the exit door 2 and the camera 4 are placed will be described on the basis of the operation diagrams of the exit door and the camera arm in the embodiment of FIG.
4A shows a state where the exit door 2 is closed, FIG. 4B shows a state where the exit door 2 is half-opened, and FIG. 4C shows a state where the exit door 2 is fully opened. ing. In addition, (a)-(c) has shown the top view of the vicinity of the exit door 2. FIG.

As shown in FIG. 4, the exit door 2 is composed of two plate-like door plates, and each door plate is rotatably supported by support columns provided on both sides of the exit of the passage 7. The camera arm 3 is rotatably supported by a support column on which one door plate is supported, and is configured to be able to rotate in conjunction with the door plate.
Therefore, when the exit door 2 is closed, the camera 4 is configured to be movable so as to be located in the vicinity of the central portion of the passage 7, and the face of the visitor 8 moving toward the exit door 2 is photographed from the front. The acquired face image can be acquired. Further, when the exit door 2 is opened, the camera 4 together with the exit door 2 moves to the side of the passage 7 (or the side of the exit door 2) and retreats, so that it does not hinder the progress of the visitors 8. It has become.

FIG. 5 is a block diagram showing the configuration of the control system of the door system in the embodiment.
In FIG. 5, reference numeral 11 denotes a visitor detection unit that detects the approach of a visitor by a proximity sensor (not shown) provided in the vicinity of the entrance door 1.
Reference numeral 12 denotes an entrance door opening / closing section, which is composed of a driving means such as a motor (not shown), a door opening / closing means for rotating the entrance door 1 to open or close it, and the like. The entrance door opening / closing section 12 opens the entrance door 1 in order to guide the entrance person to the passage 7 when the entrance detection section 11 detects the entrance person, and the entrance door 1 opens the entrance door 1 with a sensor or the like (not shown). The entrance door 1 is closed when it is detected that it has entered the passage 7 after passing through.

A biometric information reading unit 13 captures the face of the visitor who has passed through the entrance door 1 and entered the passage 7 with the camera 4 and acquires the face image of the visitor.
Reference numeral 14 denotes an exit door opening / closing section, which is composed of a driving means such as a motor (not shown), a door opening / closing means for rotating the exit door 2 to open or close it, and the like. As a result of biometric authentication performed on the face image of the visitor from a biometric authentication server, which will be described later, the exit door opening / closing unit 14 determines that the biometric authentication has been successful, that is, the face image of the visitor has already been registered. When the notification of the effect is received, the exit door 2 is opened to allow the visitor to pass, and the exit door 2 is closed when it is detected by a sensor (not shown) that the visitor has passed the exit door 2. Let

Reference numeral 15 denotes a storage unit which is composed of a semiconductor memory, a magnetic disk, or the like, stores information, and can read the stored information. The storage unit 15 stores a control program (software) for controlling the operation of the door device 6 as a whole.
Reference numeral 16 denotes a control unit, which is composed of arithmetic and control means such as a CPU (Central Processing Unit) and an MPU (Micro Processing Unit). The control unit 16 controls communication among the visitor detection unit 11, the entrance door opening / closing unit 12, the biometric information reading unit 13, the exit door opening / closing unit 14, the storage unit 15, and a biometric authentication server described later. The entire operation of the door device 6 including the communication unit is controlled based on a control program (software) stored in the storage unit 15.

A biometric authentication server 20 includes a control unit that is a calculation and control unit such as a CPU, a storage unit that is a storage unit such as a magnetic disk and a semiconductor memory, a communication unit that is a communication unit, and the like. Via the door device 6 so as to be able to communicate with each other.
A biometric information database 21 is provided in the storage unit of the biometric authentication server 20. The biometric information database 21 stores face images of visitors who are permitted to pass through the door system in advance.

The control unit of the biometric authentication server 20 collates the face image of the visitor received from the door device 6 with the face image stored in the biometric information database 21 based on the biometric authentication processing program (software) stored in the storage unit. Then, a biometric authentication process for confirming that the visitor is permitted to pass through the door system is performed, and the result of the biometric authentication process is notified to the door device 6.
Thus, the door system includes the door device 6, the biometric authentication server 20, the biometric information server 21, and the like. In the present embodiment, the biometric authentication server 20 and the biometric information database 21 are described as separate devices installed at a location away from the door device 6, but the biometric authentication server 20 and the biometric information database 21 are connected to the door device. 6 may be included. Furthermore, the biometric authentication server 20 and the biometric information database 21 may be integrated with the biometric information reading unit 13.

The operation of the above-described configuration will be described according to the step represented by S in the flowchart of the operation of the door system in the embodiment of FIG.
The operation of each unit described below is controlled by a control unit such as a central processing unit (not shown) based on a program (software) stored in a storage unit such as a memory or a magnetic disk (not shown).

S1: First, according to an instruction from the control unit 16 of the door device 6, the entrance door opening / closing part 12 closes the entrance door 1, and the exit door opening / closing part 14 closes the exit door 2 as shown in FIG. It is assumed that the camera arm 3 is rotated together with the exit door 2 so that the camera 4 is arranged at the center of the passage 7.
When the visitor detection unit 11 of the door device 6 detects a visitor approaching the entrance door 1, the entrance door opening / closing unit 12 opens the entrance door 1 according to an instruction from the control unit 16.

When the entrance door 1 is opened, a visitor enters the passage 7 from the entrance.
At this time, since the camera 4 is arranged at the center of the passage 7, it is possible to take a face image of the entering entrant from the front.
S2: When the entrance door opening / closing unit 12 opens the entrance door 1, the biometric information reading unit 13 starts to take an image of the visitor with the camera 4 according to an instruction from the control unit 16, and the face of the visitor exists in the image. Perform face detection to confirm.

Here, for face detection, for example, a correlation between an average face image generated from face images of a plurality of people and a captured image is obtained, and a visitor enters the captured image when the correlation value exceeds a predetermined threshold value. However, other known face detection techniques may be employed.
In the present embodiment, the face detection is performed by the biological information reading unit 13, but may be performed by the control unit 16.

In addition, when it is detected by an unillustrated sensor or the like that a visitor has passed through the entrance door 1, the entrance door opening / closing unit 12 closes the entrance door 1 according to an instruction from the control unit 16 and suppresses the entrance of new visitors. To do.
S3: As a result of the face detection performed by the biometric information reading unit 13, if it can be confirmed that the face of the visitor is present in the photographed image, the process proceeds to S4. On the other hand, if it is not possible to confirm the presence of the visitor's face in the photographed image, the process proceeds to S2 and the photographing of the visitor's image and face detection are continued.

S4: When it can be confirmed that the face of the visitor exists in the photographed image, the control unit 16 stores the image in the storage unit 15 as the face image of the visitor and saves it, and confirms the quality of the face image. .
The confirmation of the quality of the face image is intended to determine whether the captured face image has quality suitable for biometric authentication, and is necessary for biometric authentication based on the brightness, contrast, and face image of the captured face image. Quantify items such as eyes, nose, mouth and other facial components (feature points), fluctuations from the front of the face (eg vertical and horizontal shifts), It shall be confirmed that the numerical value of the combination exceeds a predetermined threshold value.

S5: As a result of confirming the quality of the face image, if it is determined that the quality has been secured, the shooting of the attendee is terminated and the process proceeds to S6. If the quality is determined to be insufficient, the process is performed. The process proceeds to S3, and the image capturing and face detection of the visitors are continued.
S6: When it is determined that the quality of the face image can be secured, the control unit 16 sends a notification requesting biometric authentication using the face image together with the face image stored in the storage unit 15 to the biometric authentication server 20. Send to.

The biometric authentication server 20 performs a biometric authentication process for collating the received face image with the face image of the visitor registered in advance in the biometric information database 21. This biometric authentication process may be a process using information converted into a biometric authentication format called a template, and a known biometric authentication process using a face image may be employed.
The biometric authentication server 20 that has performed the biometric authentication process determines whether the photographed face image of the visitor is registered in the biometric information database 21 in advance, that is, whether the visitor is permitted to pass through the door system. The result of the biometric authentication processing of “No” is transmitted to the door device 6.

S7: Upon receiving the result of the biometric authentication process, the control unit 16 of the door device 6 determines that the face image of the visitor photographed based on the result of the biometric authentication process is registered in advance in the biometric information database 21. If the process proceeds to S8 and it is determined that it is not registered, the process proceeds to S9.
S8: When it is determined that the photographed face image of the visitor is registered in advance in the biometric information database 21, the exit door opening / closing unit 14 is instructed by the control unit 16 as shown in FIG. And the camera arm 3 is rotated to retract the camera 4 to the side of the passage 7. As described above, the camera 4 for taking a face image of the attendee is retracted from the passage 7, so that it does not hinder the progress of the attendee.

The visitors pass through the opened exit door 2 and leave the door system. When the control unit 16 detects that the exit door 2 has been passed by a sensor or the like (not shown), the exit door 2 is closed and the camera arm 3 is rotated to place the camera 4 in the central portion of the passage 7. Wait for visitors.
S9: When it is determined that the photographed face image of the visitor is not registered in the biological information database 21, the exit door opening / closing unit 14 is left closed without opening the exit door 2 according to the instruction of the control unit 16. It is assumed that an authentication NG process that does not allow a visitor to pass is performed.

At this time, the entrance door 1 may be opened according to an instruction from the control unit 16 so as to leave the entrance from the entrance, or the entrance door 1 may be left closed so that the entrance cannot be exited. .
In this way, the door system allows only authorized visitors to pass through the door system. The action when photographing the face image of the visitor is based on the explanatory diagram of face image photographing in the embodiment of FIG. I will explain.

In this embodiment, the camera 4 is arranged from the vicinity of the exit door 2 toward the entrance door 1 as shown in the side view of the door system in FIG. The distance to the person 8 can be increased, and a single camera 4 can capture a face image of a person with a short height from a person with a high height.
Also, as shown in the plan view of the door system in FIG. 7 (b), the camera 4 is arranged in the central part of the passage 7, so that the face image of the entering participant 8 can be taken from the front, The face image of the visitor 8 with good quality can be taken.

In this embodiment, the biometric authentication server 20 performs the biometric authentication process for the visitor, but the storage unit 15 of the door device 6 includes the biometric information database 21 and the control unit 16 performs the biometric authentication process for the visitor. You may do it.
Further, in the present embodiment, the example in which the face image is biometric information has been described. However, an iris image and face skin image that require face detection may be used.

Furthermore, in this embodiment, the camera arm 3 and the camera 4 are provided above the exit door 2, but the camera 4 may be embedded in the upper part of the exit door 2.
Further, although the camera arm 3 is rotated and the camera 4 is retracted from the passage 7, the camera arm 3 is slidably supported in the vicinity of the door for opening and closing, and the camera arm 3 is closed when the exit door 2 is closed. 3, the camera 4 is moved to the vicinity of the center of the passage 7, and the camera 4 is retracted to the side of the passage 7 by sliding the camera arm 3 when the exit door 2 is opened. Also good.

  As described above, in this embodiment, since the camera 4 is arranged from the vicinity of the exit door 2 toward the entrance door 1, the distance from the camera 4 to the entrant 8 as the subject is increased. Thus, it is possible to obtain an effect that a single camera 4 can shoot a face image of a short stature visitor from a tall streak without requiring a complicated mechanism or control.

In addition, since the camera 4 is arranged in the central portion of the passage 7, the face image of the entering participant 8 can be taken from the front, and the face image of the visitor 8 having good quality can be taken. The effect of being able to do is obtained.
Furthermore, since the exit door 2 is opened and the camera arm 3 is rotated so that the camera 4 is retracted to the side portion of the passage 7, the effect of not obstructing the progress of the visitors 8 can be obtained.

The top view which shows the structure of the door system in an Example The front view which shows the structure of the door system in an Example. The side view which shows the structure of the door system in an Example. Explanatory drawing of operation | movement of the exit door and camera arm in an Example The block diagram which shows the structure of the control system of the door system in an Example The flowchart which shows operation | movement of the door system in an Example. Explanatory drawing of face image shooting in the embodiment Explanatory drawing which shows the structure of the conventional door system Explanatory drawing which shows the structure of the conventional door system Explanatory drawing which shows the structure of the conventional door system Explanatory diagram showing problems with conventional door systems

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Entrance door 2 Exit door 3 Camera arm 4 Camera 5 Side panel 6 Door apparatus 7 Passage 8 Visitor 11 Visitor detection part 12 Entrance door opening / closing part 13 Biometric information reading part 14 Exit door opening / closing part 15 Memory | storage part 16 Control part 20 Living body Authentication server 21 Biometric information database

Claims (6)

In a door device having a biometric information reader that reads a face image of a visitor as biometric information, and a door that is opened and closed based on the result of biometric authentication performed with the biometric information read by the biometric information reader.
A biological information reader support unit that supports the biological information reader and moves the biological information reader to the vicinity of the center of the door when the door is closed, and moves the biological information reader to the side of the door when the door is opened. Provided,
A door device characterized in that a biological information image from the front including a face image of a visitor heading to the door can be photographed by a biological information reader moved near the center of the door when the door is closed. . The door device of claim 1,
One end of the biometric information reader support unit is rotatably supported on a column on a side of the door, and the biometric information reader is fixed to the other end. The door device of claim 1,
The biological information reader support section is slidably supported in the vicinity of the door to be opened and closed, and the end portion to which the biological information reader is fixed is located between the vicinity of the central portion of the door and the side portion of the door together with the opening and closing of the door. A door device characterized by moving the door. The door device of claim 2,
The biometric information reader support unit rotates with the door closing operation to move the biometric information reader to the vicinity of the center of the door, and rotates with the door opening operation to move the biometric information reader to the side of the door. When the door is closed, the face image of the front of the visitor facing the door can be taken with the biological information reader moved near the center of the door, and the progress of the visitor when the door is opened A door device characterized by not obstructing. In the door apparatus of Claim 1 to Claim 3 or Claim 4,
A door device that transmits biometric information of a visitor read by a biometric information reader to a biometric authentication server, and opens and closes the door according to the result of biometric authentication received from the biometric authentication server. In the door system that acquires the face image of the visitor as biometric information and opens the door when authenticating that the visitor is registered in advance based on the biometric information,
A biometric information database that pre-registers biometric information of visitors who are permitted to enter, and a biometric information that is registered by checking the received biometric information against the biometric information registered in the biometric information database A biometric authentication server that authenticates and returns the results;
A door device according to any one of claims 1 to 4,
A door characterized in that a door device transmits biometric information of a visitor read by a biometric reader to a biometric authentication server, and opens and closes the door according to the result of biometric authentication received from the biometric authentication server. system.

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