JP4493521B2 - Access control device - Google Patents

Description

  The present invention relates to an entrance / exit management device that monitors passage of people at an entrance / exit.

In places where outsiders are prohibited from entering without permission, such as companies, when entering or entering a room, an ID card such as an employee ID card or pass permit may be required at the entrance. There is a device that allows a pass by allowing a card reader or the like to mechanically read the presented ID card or the like instead of confirming the ID card or the like. In such a system, the authenticity of an ID card or the like read by the card reader is determined, and if it is determined to be correct, access is permitted. Specifically, permitting access is to unlock the electric lock or automatically open the door only when the card reading device is linked to the doorway and reads the permitted ID. Is to do so.
On the other hand, when the correct ID cannot be read, the locked state is maintained, for example, so that traffic cannot be made.
Japanese Patent No. 3550982

As described above, when a person who has been allowed to pass reads an ID card or the like, the door is opened or unlocked for a certain period of time.
In this device, for example, an unauthorized intruder who does not have an ID card intrudes with a legitimate passer while a person who is permitted to pass reads a legitimate ID and the door is open for a certain period of time. It is possible.

On the other hand, when an intruder narrows the passage or reads one ID so that it cannot pass along with a regular passer-by, even after unlocking the ID, It may be possible to lock the door or close the door. However, if the door is closed immediately in this way, it is inconvenient for a regular passer-by to pass quickly after presenting the ID card.
In addition, when only one person is allowed to pass by reading one ID, for example, when a plurality of outsiders are to be passed by meeting with outsiders, for example, Each outsider must also be given an ID card such as a traffic permit.

  An object of the present invention is to provide an entrance / exit management device that detects when an unauthorized person has infiltrated with an authorized person and allows the authorized person to pass through the entrance more smoothly. Is to provide.

1st invention is the passage permission information input part which inputs the passage permission information for permitting passage of an entrance / exit, the opening / closing detection part which detects the opening / closing state of opening / closing means, such as a door, and the object which passes the said opening / closing means 3D image capture unit that captures a 3D image of the object from above, a storage unit, and a passage control information input unit, an open / close detection unit, a 3D image capture unit, and a processing unit connected to the storage unit Device.
The storage unit includes a head specific distance from a preset reference point that specifies the head of the object in the image captured from the stereoscopic image capturing unit, and a body part based on the reference point or the head. The torso specific distance, the reference size of the head and torso, and the number of permitted passages associated with the passage permission information, and the processing unit is information input from the passage permission information input unit A function for specifying the number of permitted passages stored in the storage unit based on the image, and when an open state signal of the opening / closing means is input from the opening / closing detection unit, the image input from the stereoscopic image capturing unit is processed A function for specifying as an image, a function for specifying all objects in the processing target image, a function for specifying the vertices of each object, a specified vertex and a head specifying distance stored in the storage unit, Based on A function for identifying the head, a function for identifying the torso based on the apex or the head and the torso specific distance stored in the storage, and the identified head and storage A function of determining whether or not the specified head is within the reference size, and the reference size of the torso stored in the specified torso and storage unit And a function for determining whether or not the specified trunk is within the reference size, and a function for outputting an abnormal signal when at least one of the head or the trunk exceeds the reference size. When the specified head and the corresponding torso are within the size of the reference, the function of counting one passing person with the set of head and torso and the total number of passing persons And the passer-in memorized in the memory Versus the door, when the total passing people is larger than the passing permission number, it has a feature in that a function of outputting an abnormality signal.

  The second invention is based on the first invention, and the processing unit starts the image capturing function of the stereoscopic image capturing unit when the open state signal of the opening / closing means is input from the opening / closing detecting unit. It is characterized in that the total number of passing people is cleared when a closing state signal of the opening / closing means is input from the opening / closing detection unit or when new passage permission information is input from the passage permission information input unit.

According to the first and second inventions, when a non-authorized passer such as an ID card presents passage permission information and intrudes from the entrance together with a normal passer-by, it is detected and an abnormal signal is output. be able to. If the abnormal signal is input to an alarm device or the like, an illegal intrusion can be notified.
In addition, a plurality of passage permitters are associated with one passage permission information, so that a plurality of passages can be permitted quickly.
According to the second invention, the number of passing people can be counted for each open state.

An embodiment of the access management system according to the present invention will be described with reference to FIGS.
As shown in FIG. 1, the overall configuration of the access control apparatus includes a passage permission information input unit 1, an open / close detection unit 2 that detects an open / closed state of a door, a stereoscopic image capturing unit 3, a storage unit 4, and the like. And a processing unit 5 connected to the.
The passage permission information input unit 1 is a card reader that reads an ID from an ID card carried by a passerby who is permitted to pass through the entrance. The ID of the ID card corresponds to the passage permission information of the present invention, but the ID reading method may be any method such as an optical method or wireless communication. In addition to the card ID and employee ID, the pass permission information may be biological information such as a fingerprint, a voiceprint, and an iris. However, here, the card ID is permitted to pass.

  The open / close detection unit 2 is actually a sensor that detects whether the open / close means provided at the doorway, such as a door, a sliding door, or a flap, is open or closed. The open / closed state of the opening / closing means means whether or not the door or the like is actually open, and the opening / closing is detected regardless of the unlocking and locking. The door may be opened and closed automatically by an electric motor or the like, or manually by a person.

  The stereoscopic image capturing unit 3 is a camera that captures a passerby passing through an entrance from information, and can identify a distance from the camera to an object. In this embodiment, the stereoscopic image capturing unit 3 is configured by two line sensors. The image captured by the stereoscopic image capturing unit 3 is, for example, the image 6 in FIGS. 5 to 8. The processing unit 5 processes the data of the image 6, and an object that has passed through the doorway is permitted to pass. I try to judge whether I am a person.

The area appearing in the image 6 is near the entrance / exit to be monitored in this system. The object moving toward the entrance / exit in the image 6 is considered to have passed through the entrance / exit.
In addition, the graphs 7 in FIGS. 5, 6, 7, and 8 represent the height of one line l1 portion of the image 6 on the vertical axis. Note that the height data of the line l1 part is an example, and the line for actually detecting the height can be changed depending on the position of the object, and the number of lines constituting the image is also It can be a book.

The storage unit 4 stores data necessary for the processing unit 5 to determine whether an unauthorized person has passed through the entrance. For example, as shown in the table of FIG. 2, the storage unit 4 stores IDs that are allowed to pass and the number of allowed passages X associated with each ID. The passage permission ID is an ID that permits passage of the doorway when the ID is input.
Further, the permitted number of people X is the number of people who are allowed to pass at the same time with one corresponding ID. For example, since the number of persons 1 (person) corresponds to ID001, only one person is permitted to pass when ID001 is input. That is, when ID001 is input, only the person carrying the ID card is allowed to pass.

  On the other hand, since the number of persons 5 (persons) is associated with ID002, when ID002 is input, the passage of five persons is permitted at the same time. It is necessary to set the permitted number of people in the storage unit 4 in advance. For example, if an employee carrying an ID002 card enters the entrance with the other four members and holds a meeting in the conference room inside, the other four people can be set in the storage unit 4. Even if you don't have an ID card, you can get inside with someone who has an ID card.

  Further, the storage unit 4 includes a head specifying distance and a torso for specifying a person's head in order to determine whether the object is a person from the image captured by the stereoscopic image capturing unit 3. The body specific distance for specifying the head and the reference size of the head and the body are also stored. The reference size of the head is, for example, the rectangle A in FIG. 4 and is considered to be normal as a human head, and the reference size of the torso is the rectangle B in FIG. The size is considered normal as a part.

The operation of this system will be described below using the flowchart of FIG.
In this example, an electric lock is installed at the doorway, and the unlocking of the electric lock is controlled by the processing unit 5.
First, a passerby who carries an ID card having an ID which is the passage permission information of the present invention places his / her card on the passage permission information input unit 1 and reads the ID.
That is, in step S <b> 1 of FIG. 3, the processing unit 5 reads the ID via the passage permission information input unit 1. In step S2, the ID of the authorized person stored in the storage unit 4 is compared with the read ID.

If the read ID matches the passage permission ID in step S3, the process proceeds to step S4, the electric lock is unlocked, and the process proceeds to step S5. On the other hand, if the ID does not match the passage permission ID in step S3, the process returns to step S1.
In step S5, the processing unit 5 determines whether or not the door is open. If the door is not open, the process returns to step S1, and if it is determined that the door is open, the process proceeds to step S6 and the stereoscopic image is displayed. The capturing of the capturing unit 3 is started.

  Whether the door is open is detected by the open / close detection unit 2 and a detection signal is input to the processing unit 5. The opening / closing of the door is not related to the unlocking process of the processing unit 5, and the opening / closing detection unit 2 inputs an open state signal to the processing portion 5 when the door is actually opened, and the door is closed. Sometimes a closed state signal is input. Note that the open state signal and the close state signal are only required to be opened and closed by the processing unit 5, and it is not always necessary to input two types of signals. For example, a specific open state signal may be input to the processing unit 5 in the open state, and the open state signal may not be input in the closed state. Thus, the absence of an input of an open state signal is also included in the input of a closed state signal. Conversely, stopping the input of the closed state signal is also included in the input of the open state signal.

In step S6, shooting is started. When an image is input from the stereoscopic image capturing unit 3 in step S7, in step S8, the processing unit 5 determines whether there is an object in the input image.
If no object is detected, the door is open even though there is no one, so the process proceeds to step S20, and the processing unit 5 outputs an abnormal signal. An abnormal signal output from the processing unit 5 can be output to an alarm device to generate an alarm.
If an object is detected in step S8, it is determined in the following steps whether the object is a person.

In step S <b> 9, the processing unit 5 specifies the head based on the head specifying distance stored in the storage unit 4. The head specifying distance is a distance that is lowered downward from the stereoscopic image capturing unit 3 and is a distance for specifying a human head position.
For example, when there is an object in the image captured by the stereoscopic image capturing unit 3, the image captured by the processing unit 5 is an image 6 in FIG. 5. This image 6 is taken from below from the stereoscopic image capturing unit 3 provided on the ceiling side near the door, and is an image of a person who is going to pass through the entrance from above.

Such an image 6 is divided into a plurality of lines, and the height of one line 11 is shown in a graph 7. The graph 7 is a graph in which the horizontal axis is a position on the passage toward the entrance and the vertical axis is the height, and the height h0 is the installation height of the stereoscopic image capturing unit 3 and is a high part exceeding the height h1. Is the head and the lower part is the torso.
From such an image, with reference to the height h0, the height h1 lowered by the distance d1 is the head, and the height further lowered by the distance d2 from the height h1 is determined as the position of the torso. I have to.
That is, the height h0 is the reference position of the present invention, the distance d1 from the reference position is the head specific distance of the present invention, and the distance d2 from the height h1 that is the head position is , The torso specific distance. Each of these distances is stored in the storage unit 4. In this embodiment, the attachment position of the stereoscopic image capturing unit 3 is the reference position, but this reference position may be anywhere. For example, the apex of the object specified in the image may be used as the reference position, and the head and torso may be specified based on the distance from the apex.

As described above, when the processing unit 5 specifies the head position having the height h1 in step S9 based on the head specifying distance d1 stored in the storage unit 4 and the reference position h0, the process proceeds to step S10.
In step S10, it is determined whether or not the identified head is within the reference size A (see FIG. 4) stored in the storage unit 4. That is, as shown in FIG. 6, the size of the object at the height h1 specified as the head is compared with the reference size A of the head, and the size is determined. As a result, if the head specified in step S9 is larger than the reference size A, it is determined that the head is not a human head, and the process proceeds to step S20 to output an abnormal signal.

If it is determined in step S10 that the head is within the reference size IA, the process proceeds to step S11, the trunk is identified based on the trunk identification distance d2 stored in the storage unit 4, and the process proceeds to step S12. In step S12, as with the head, it is determined whether or not the identified trunk is within the standard size B of the trunk (see FIG. 4). If the body part exceeds the reference size, the process proceeds to step S20 and an abnormal signal is output. In addition, the said trunk | drum is a trunk | drum specified with respect to the head specified previously, Comprising: It is a trunk | drum of the same person as a head.
If it is determined in step S12 that the body is within the reference size B, the process proceeds to step S13, where it is determined that the body is a person, and one person is added to the passing number x.

Next, in step S14, it is determined whether or not there is a head in another area in the same image 6. The head specifying method is performed based on the head specifying distance by specifying an object, as in steps S8 and S9.
If a new head is specified, the process returns to step S10. If it is determined in step S14 that there is no other head in the image 6, the process proceeds to step S15. In step S15, the permitted number of passages “X” stored in the storage unit 4 is compared with the number of permitted passages x added in step S13. The permitted number of passages “X” is the permitted number of people corresponding to the ID read in step S1.

If the total number of passing persons x exceeds the permitted number of passing persons “X”, an unauthorized person has also passed, so the process proceeds to step S20 and an abnormally upper signal is output.
If it is determined in step S15 that the total number of passing people x is within the permitted number of passing people “X”, the process proceeds to step S16. If it is detected in step S16 that the door is closed, the process proceeds to step S17 to reset the passing number x. The processing unit 5 terminates the photographing in step S18 and locks in step S19. This completes the process of detecting unauthorized entry with one open door.
If it is detected in step S16 that the door is open, the process proceeds to step S21, and it is determined whether or not a new ID is input. If no new ID has been input, the process proceeds to step S7, a new image is taken in, and the processes in and after step S7 are repeated.

  On the other hand, when the input of a new ID is detected in step S21, the process proceeds to step S22, where the input ID is checked against the passage permission ID stored in the storage unit 4, and the input ID and the passage permission ID are checked. If YES, the process proceeds to step S23, the number of passing people x is reset, and the process returns to step S7. That is, the monitoring of the passer corresponding to the previously input ID is terminated, and the process proceeds from step S23 to step S7 to monitor the passerby corresponding to the newly input ID.

  If the newly input ID does not match the pass permission ID in step S22, the process returns to step S7. In this case, the passing person who has input the ID is not a person who is normally permitted to pass, but the process after step S7 is performed, and if it is determined that the person is a person, the passing number is added in step S13. As described above, when the number of unauthorized intruders is counted as a passing person, the number of passing people x exceeds the number of allowed passing persons “X” in step S15, so that the process proceeds to step S20 and an abnormal signal is output. Here, unauthorized intrusion can be detected.

  FIGS. 7 and 8 show images when two persons are trying to pass through the door with two persons in a row for an ID that only one person is permitted to pass. As shown in FIG. 7, in step S9, the head can be specified at the position of the height h1 based on the head specifying distance d1. In the case of FIG. 7, there are two separated objects that can be regarded as the head at the height h <b> 1. First, one is identified as the head, and when it is determined in step S10 that the head is within the reference size A as shown in FIG. 8, the process proceeds to step S11. Identify the torso.

However, in FIG. 7, FIG. 8, the trunk | drum specified by trunk | drum specific distance is continuing for two persons. Therefore, in step S12, the two-entry body part is used as one body part and compared with the reference size B. Therefore, it is determined that the trunk is larger than the reference size B, and the process proceeds to step S20 to output an abnormal signal. In this way, even when a plurality of persons are closely attached and try to pass through impersonating one person, it can be detected as an abnormality.
In the apparatus of the present invention, if the number of persons permitted to pass is registered in the storage unit 4 in advance, the passage of a plurality of persons can be permitted using one piece of passage permission information such as an ID. Therefore, the passage of a plurality of persons can be permitted promptly.

It is a block diagram of the apparatus in embodiment of this invention. It is the table | surface which showed the example of data which the memory | storage part 4 of embodiment has memorize | stored. It is the flowchart which showed the process sequence of the process part of embodiment. It is an example of the reference | standard size of the head and trunk | drum which the memory | storage part in embodiment has memorize | stored. It is the graph which showed the height data in the line l1, and the image which the stereo image capture part at the time of one person passing. It is the figure which showed the example which contrasts the image of FIG. 5, and reference | standard magnitude | size. It is the graph which showed the height data in the line 11 and the image which the stereo image capture part at the time of two people passing together. It is the figure which showed the example which contrasts the image of FIG. 5, and reference | standard magnitude | size.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Permission information input part 2 Opening / closing detection part 3 Stereoscopic image taking-in part 4 Memory | storage part 5 Processing part 6 Image d1 Head specific distance d2 Body specific distance A Head standard size B Body standard size

Claims (2)

  A passage permission information input unit for inputting passage permission information for permitting passage through the doorway, an opening / closing detection unit for detecting an opening / closing state of an opening / closing means such as a door, and a stereoscopic image of an object passing through the opening / closing means. A stereoscopic image capturing unit that captures images from above, a storage unit, a passage permission information input unit, an open / close detection unit, a stereoscopic image capturing unit, and a processing unit connected to the storage unit, and the storage unit includes the stereoscopic image A head specific distance from a preset reference point that specifies the head of the object in the image captured from the capture unit, a trunk specific distance that identifies the trunk based on the reference point or the head, and a head The reference size of the head part and the body part and the number of allowed passages associated with the passage permission information are stored, and the storage unit stores the processing unit based on the information input from the passage permission information input unit. A function for specifying the over-permitted number of persons, a function for specifying an image input from the stereoscopic image capturing unit as a processing target image when an open state signal of the opening / closing means is input from the opening / closing detection unit, and the processing target A function for specifying all the objects in the image, a function for specifying the vertices of each object, a function for specifying the head based on the specified vertices and the head specifying distance stored in the storage unit, , The function of specifying the torso based on the apex or the head and the torso specifying distance stored in the storage unit, and the reference size of the head stored in the specified head and storage unit The function of determining whether or not the specified head is within the reference size is compared with the reference size of the torso stored in the storage unit and the storage unit, and specified. Whether the body is within the above standard size A function to output an abnormal signal when at least one of the head or torso exceeds the reference size, and the specified head and the corresponding torso are both the reference When the number of passing persons is counted with the set of head and torso, the total number of passing persons and the number of permitted passing persons stored in the storage part are compared, and the total An access control device having a function of outputting an abnormal signal when the number of passing people is larger than the number of allowed passing people.   When the opening state signal of the opening / closing means is input from the opening / closing detection unit, the processing unit starts the image capturing function of the stereoscopic image capturing unit, while when the closing state signal of the opening / closing unit is input from the opening / closing detection unit, Alternatively, when new passage permission information is input from the passage permission information input unit, the counted total number of passing persons is cleared.

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