JP2011227680A - Suspicious person monitoring device and suspicious person monitoring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly conform a suspicious person through an image and to deal with he or she while suppressing the load on a monitoring center.SOLUTION: A suspicious person monitoring device that detects the suspicious person in a watched zone set at the periphery of an object to be monitored, and transmits an image generated by photographing the watched zone to the external monitoring center through a communication line includes: an imaging unit which photographs the watched zone to acquire the image, a suspicious person detection unit which detects the suspicious person present in the watched zone, and a warning processing unit which sends an image monitoring request to the monitoring center when the suspicious person is detected in a monitored zone excluding an emergency zone nearby the object to be monitored in the watched zone, and reports emergency occurrence to the monitoring center when the suspicious person is detected in the emergency zone.

Description

  The present invention relates to a suspicious person monitoring apparatus and a suspicious person monitoring system for detecting a suspicious person approaching an important object such as a safe and transmitting a photographed image to a monitoring center.

  2. Description of the Related Art Conventionally, there is provided an image monitoring system in which a monitoring camera is installed in a building to be monitored such as an office, an intruder into the building is detected by image analysis, and a captured image is reported to a remote monitoring center. In general, the image monitoring system has a warning set mode and a warning release mode, and reports a failure by regarding a person who has entered the building during the warning set mode when the user is not in the building as a suspicious person.

The above image monitoring system monitors an intrusion into an unattended building where there is no user, but the scene where a crime occurs is not limited to this. For example, there is a crime in which an ATM is operated using an illegally obtained bank cash card and a deposit of another person is paid out. In addition, there are crimes that aim at a safe and push into robbers when a user is present.
In these cases, since it is assumed that there are a large number of unspecified persons other than the specific user in the monitored area, it is necessary to extract a suspicious person from them. As a method for detecting an unauthorized user of ATM, an alarm device that detects that an ATM user is a suspicious person by image processing has been proposed (Patent Document 1 below). This alarm device installs a surveillance camera on the top of the ATM to photograph an ATM operator, and extracts eyes, nose, mouth, and the like, which are facial features, from the image. If the face is concealed by wearing a mask and sunglasses, the characteristic part cannot be extracted and the person is determined to be a suspicious person. And when it determines with a suspicious person, it reports to an administrator etc., and an administrator monitors an image in detail and confirms that it is a suspicious person.

Japanese Patent Laid-Open No. 5-35992

The alarm device operates the suspicious person detection algorithm at the timing when the ATM is operated. That is, the suspicious person determination is performed in a situation where there is a person in the immediate vicinity of the ATM. For this reason, when an administrator who has received a report indicating that a suspicious person has been detected confirms an image, an illegal act has already begun, and there is a possibility that a response such as threatening the suspicious person may be delayed. This problem also occurs when monitoring the above-described safe or the like.
On the other hand, if the monitoring range is expanded, for example, the entire store where ATMs are installed or the entire room where safes are installed, even if a person who does not plan to approach the monitored object such as a safe wears masks and sunglasses , Will be reported as a suspicious person. Therefore, there is a problem that such an erroneous report increases the workload of image confirmation at the administrator or the monitoring center.

  Accordingly, the present invention has been made to solve the above-described problems, and provides a suspicious person monitoring apparatus and a suspicious person detection system capable of quickly dealing with a suspicious person while suppressing a burden on a monitoring center or the like. The purpose is to do.

In order to achieve the above object, the suspicious person monitoring device of the present invention detects a suspicious person in a warning zone set around a monitored object, and images the warning zone to an external monitoring center via a communication line. In the suspicious person monitoring device that transmits the image, the imaging unit that captures the warning zone and acquires the image, the suspicious person detection unit that detects the suspicious person existing in the warning zone, and the monitoring of the warning zone When a suspicious person is detected in a monitoring zone excluding an emergency zone near the object, an image monitoring request is notified to the monitoring center, and when a suspicious person is detected in the emergency zone, an alarm is sent to the monitoring center that an emergency situation has occurred. And a processing unit.
According to such a configuration, by changing the content of the report depending on whether the person detected as a suspicious person is in the vicinity of the monitoring object or at a certain distance, while suppressing the burden of image confirmation at the monitoring center, You can quickly deal with suspicious individuals.

Further, in the above configuration, further comprising an alarm unit that outputs an alarm sound around, the alarm processing unit does not output the alarm sound when reporting the image monitoring request, and when reporting the occurrence of the emergency An alarm sound is output.
According to such a configuration, when a person detected as a suspicious person is located at a certain distance from the object to be monitored, an alarm sound is not emitted, but the monitoring center can perform image monitoring. Even when the person is not a suspicious person, it is possible to prevent the person and others from feeling uncomfortable.

In the above configuration, the suspicious person detection unit tracks the suspicious person detected in the monitoring zone while the suspicious person is in the warning zone, and the warning processing unit monitors the image monitoring request notification. When a normal confirmation signal is received from the center, the occurrence of the emergency is not notified even if the suspicious person being tracked is detected in the emergency zone.
According to such a configuration, since an emergency call is not made to a person who has already been confirmed to be a suspicious person at the monitoring center, the monitoring burden at the monitoring center and discomfort to the parties and the surrounding people can be avoided. Can be prevented.

In the above configuration, the alarm processing unit sets a permission flag for the suspicious person being tracked when receiving the normal confirmation signal, and sets the permission flag for the suspicious person detected in the emergency zone. If it is not set, the occurrence of the emergency is reported.
Moreover, it is preferable that the alarm processing unit terminates the transmission of the image accompanying the notification of the image monitoring request when receiving the normality confirmation signal. The alarm processing unit transmits the low-quality image to the monitoring center when notifying the image monitoring request, and transmits the high-quality image to the monitoring center when notifying the occurrence of the emergency. Also good.

  In order to achieve the above object, the suspicious person monitoring system according to the present invention detects a suspicious person in a warning zone set around a monitoring target and transmits an image obtained by photographing the warning zone. And a monitoring center that receives and displays the transmitted image. The suspicious person monitoring device includes an imaging unit that captures an image by capturing the warning zone, and a suspicious person that exists in the warning zone. A suspicious person detection unit that detects a person and tracks the person while in the warning zone, and detects a suspicious person in a monitoring zone other than an emergency zone in the vicinity of the monitoring object in the warning zone. When a monitoring request is reported and a suspicious person is detected in the emergency zone, if a normal confirmation signal has not been received from the monitoring center for the suspicious person, an emergency has occurred to the monitoring center. An alarm processing unit for reporting, the monitoring center, a notification unit for notifying a monitor of the notification of the image monitoring request received from the suspicious person monitoring device and the notification of occurrence of the emergency, and the suspicious person monitoring A display unit for displaying the image received from the device, and an input unit for inputting a normal confirmation operation by a monitoring person, and the normal confirmation for the notification of the image monitoring request from the suspicious person monitoring device. When an operation is input, the normality confirmation signal is transmitted to the suspicious person monitoring device.

  ADVANTAGE OF THE INVENTION According to this invention, the countermeasure against a suspicious person can be practiced rapidly, suppressing the burden of the image confirmation in a monitoring center.

It is a schematic structure figure of monitoring system 1 of this embodiment. 2 is a diagram illustrating a schematic configuration of a monitoring device 2. FIG. It is an image figure showing the arrangement | positioning condition and monitoring space of the monitoring apparatus 2. FIG. 4 is a flowchart showing an operation of a monitoring process in the monitoring device 2.

  Hereinafter, as an embodiment of the present invention, a suspicious person monitoring system (hereinafter simply referred to as a monitoring system) that monitors a space around a safe that is an object to be monitored will be described as an example with reference to the drawings.

First, an overview of the overall configuration and operation of the monitoring system according to the present embodiment will be described.
FIG. 1 is a schematic configuration diagram of a monitoring system. The monitoring system 1 includes a suspicious person monitoring device 2 (hereinafter simply referred to as a monitoring device) and a monitoring center 3. The monitoring device 2 is provided for each building where the monitoring object is present, detects a suspicious person in the monitoring space around the monitoring object, and notifies the monitoring center. Moreover, the monitoring apparatus 2 transmits the image which image | photographed monitoring space to the monitoring center. The monitoring center 3 is communicably connected to each monitoring device 2 via a communication line 4 such as a public network, and comprehensively manages the plurality of monitoring devices 2. In the monitoring center 3, a supervisor who responds to a report from the monitoring device 2 is resident. The monitor observes the situation at the site by looking at the image sent from the monitoring device 2, and warns a suspicious person via the monitoring device 2 or instructs the security guard or the like as necessary.

  In general, in an office or the like, a safe, which is an object to be monitored, is often installed in an office or the like where employees enter and exit during work. Visitors other than employees may come and go. That is, even if there is a person wearing sunglasses or a mask among the persons around the safe, it may not be a suspicious person. Therefore, the monitoring device 2 according to the present embodiment distinguishes the warning zone around the safe, which is the monitoring target, into an emergency zone corresponding to the space near the safe and an outer space adjacent to the emergency zone as a monitoring zone. Different monitoring processes are executed depending on the position where the person is detected. For example, the emergency zone has a range of 1 m around the safe and the monitoring zone has a range of 1 m to 5 m around the safe. Even if there is a person who seems to be a suspicious person in the surveillance zone, it cannot be determined that it is a bandit such as a robber who invades the safe. For this reason, when the suspicious person is detected in the monitoring zone, the monitoring device 2 issues a monitoring request notification in order to request monitoring by image monitoring at the monitoring center. Upon receiving the monitoring request notification, the monitoring center 3 continuously monitors the image in real time to see if there is any person taking suspicious behavior, and if necessary, makes a voice call with the monitoring device 2. Make a phone call to warn the person who seems to be on the scene safety and suspicious to stop the crime. On the other hand, if a suspicious person is detected in the emergency zone near the safe, it is an emergency that the suspicious person is approaching the safe, and an emergency call is sent to the monitoring center. In the monitoring center 3 that has received the emergency call, the monitor immediately warns the suspicious person to stop the crime.

Subsequently, the configuration and operation of the monitoring device 2 and the monitoring center 3 will be described. First, the configuration and operation of the monitoring center 3 will be described. The monitoring center 3 has a function for communicating with the monitoring device 2 via the communication line 4, a function for displaying an image (liquid crystal display), and a function for inputting various operations by the monitor (keyboard and mouse). Have In addition, a function (a microphone and a speaker) for performing a voice call with the monitoring device 2 is provided. The monitoring center 3 can be configured using, for example, a personal computer.
When the monitoring center 3 receives a report from the monitoring device 2, the monitoring center 3 drives a liquid crystal display and a speaker to notify the monitoring staff that the notification has been received, and displays an image received from the monitoring device 2 on the liquid crystal display. Further, when a voice call instruction is input from the monitoring person via the keyboard or mouse, the telephone call is started with the monitoring center. Further, the monitoring person confirms the image to confirm that the site is normal, and when a normal confirmation operation is input from the monitoring person via the keyboard or the mouse, a normal confirmation signal is transmitted to the monitoring device 2. This normal confirmation will be described in detail later.

Next, the configuration and operation of the monitoring device 2 will be described. FIG. 2 is a diagram illustrating a schematic configuration of the monitoring device 2. FIG. 3 is an image diagram showing an arrangement state and a monitoring space of the monitoring device 2.
In the example shown in FIG. 3, the monitoring device 2 is installed above the safe 10 and monitors a suspicious person in a warning zone around the safe 10. The outside of the warning zone is the watched zone and is not monitored. The arrangement of the monitoring device 2 may be set to a position suitable for monitoring the vicinity of the safe 10 according to the installation location of the safe 10 that is the monitoring target and the environment of the room.

The monitoring device 2 includes a camera 21, a storage unit 22, a microphone 23, a speaker 24, a communication unit 25, and a control unit 26.
The camera 21 includes, for example, a CCD image sensor or a CMOS image sensor as an image sensor, captures a shooting target space including at least the entire warning zone in the shooting angle of view, and outputs an image generated by converting the image into an electrical signal to the control unit 26. To do. When the subject to be photographed includes a person, the camera 21 preferably has an automatic focus adjustment function for focusing on the person or the face of the person. Or you may give the function which adjusts a focus automatically to two steps of the emergency zone of a short distance, and the long-distance monitoring zone from the monitoring apparatus 2 relatively. In addition, it is possible to separately provide means for photographing the emergency zone and means for photographing the monitoring zone and use a plurality of imaging means.

  The storage unit 22 includes a semiconductor memory and a hard disk, and stores various programs and data necessary for the operation of the monitoring device 2. In particular, a program and reference data necessary for detecting a suspicious person by the control unit 26 are stored. In addition, it has an area where a captured image of a predetermined period can be recorded by the recording control of the control unit 26.

The microphone 23 and the speaker 24 are controlled by the control unit 26 and are means for realizing a voice call performed between the monitoring site where the monitoring device 2 is installed and the monitoring staff of the monitoring center 3. The speaker 24 has a function of emitting an alarm sound to the surroundings when an emergency occurs.
The communication unit 25 is means for communicating with the monitoring center 3 via the communication line 4, and is configured by, for example, an ISDN modem. When performing wireless communication using a mobile communication network, a communication module adapted to the adopted wireless communication standard may be used.

  The control unit 26 is configured by a microprocessor (MPU) or the like, executes a program stored in the storage unit 22, controls the operation of each unit of the monitoring device 2, and executes a monitoring process. Specifically, the control unit 26 is connected to the camera 21, the storage unit 22, the microphone 23, the speaker 24, and the communication unit 25, processes a signal input from each unit, and controls the operation of each unit. The control unit 26 functions as a suspicious person detection unit and an alarm processing unit of the present invention.

  The control unit 26 extracts a person existing in the alert zone from the image taken by the camera 21, and further determines whether or not each extracted person is a suspicious person. Different alarm processing is executed depending on whether the detected suspicious person is in the emergency zone or the monitoring zone. Hereinafter, the monitoring process executed by the control unit 26 will be described in detail.

  The control unit 26 uses the captured images that are sequentially input, and extracts a grouped region in which a luminance change occurs between a plurality of frames as a variation region. When parameters such as the size and shape of the variable area meet the humanity standard preset in the storage unit 22, the variable area is recognized as a person.

  In addition, the control unit 26 determines whether the extracted person exists in either the emergency zone or the monitoring zone. Specifically, the vertical coordinate of the photographed image and the distance from the safe 10 are registered in the storage unit 22 in association with each other, and the foot position of the extracted person (the lowermost pixel of the variable area constituting the person) Based on the coordinates, the distance from the safe 10 to the person position is calculated, and the zone where the person exists is determined. The relationship between the coordinates of the photographed image and the distance is determined according to the installation position of the camera 21 and the reference photographing direction.

  The zone determination method in which the extracted person exists is not limited to the above, and any known method may be used. For example, a stereo camera can be used as the camera 21 and the position of a person can be calculated using parallax information. Alternatively, a camera separate from the camera 21 is provided at a position different from the monitoring device 2 (for example, a position where the camera 21 is photographed downward from the ceiling), and a zone where a person exists based on the position correspondence of the person extracted by the two cameras is provided. You may judge. The position of the person can also be obtained by measuring the direction of the person detected on the image by using a laser, ultrasonic wave, or microwave ranging sensor together without being limited to the image determination method.

  When the control unit 26 extracts a person in an emergency zone or a monitoring zone that is a warning zone, the control unit 26 determines whether the extracted person meets a suspicious person's criterion set in the storage unit 22 in advance. It is determined whether or not. The detection method of the suspicious person is not limited to the image, and any method may be used. In the present embodiment, the image characteristic of the suspicious person is a face characteristic part in which an image acquired by the camera 21 can be identified. It is detected that there is a person who hides each part (eyes, nose, mouth) (each part of the face cannot be detected).

  Specifically, the edge component of the fluctuation region constituting the person is extracted, the edge distribution of the elliptical shape approximated to the contour shape of the face is detected in the edge image data, and the inside of the elliptical region surrounded by the edge distribution is detected. When the color information includes skin color (for example, a pixel having a hue (H) component from 0 to 30 in the HSV color system), the elliptical area is extracted as a face area. Then, it is determined whether or not an edge (for example, a horizontal edge such as an eye or a mouth) that becomes a facial feature portion appears in the facial region, and a person who cannot detect such a facial feature portion is a suspicious person. Is determined.

  In addition, the control unit 26 individually detects a face area wearing sunglasses and a mask from the luminance distribution of the face area. In the face area where the sunglasses and the mask are worn, dark pixels concentrate on the upper side, so that the luminance center of gravity in the vertical direction is lower than the center. Further, the luminance value for each line viewed in the horizontal direction is small, whereas the variance of the luminance value for each line viewed in the vertical direction is large. Furthermore, there is a property that the luminance value is extremely low depending on the part of the sunglasses. Therefore, the Y coordinate of the luminance center of gravity of the face area is below the center of the face area, and the ratio between the standard deviation in the X direction and the standard deviation in the Y direction is larger than a predetermined threshold, and the pixel having a low luminance value Is equal to or greater than the threshold value, it is determined that the image in the face area is an image of a face wearing sunglasses and a mask, and the face area is determined to be a suspicious person.

The suspicious person detection process is not limited to this, and may be determined based on whether or not the appearance of the person matches a preset suspicious person pattern.
For example, face features of some users who have the authority to unlock all users or safes are registered in the storage unit 22 in advance, and if the detected face features of the person do not match the registered data, Judge as a suspicious person. Alternatively, if a suspicious person's facial feature part is registered in advance using a suspicious person's database shared in the region, etc., and the detected person's facial feature part matches the registered data, the person is suspicious. Judged as a person.

  Moreover, the control part 26 labels the fluctuation area | region which comprises the person determined to be a suspicious person, and tracks while existing in a warning zone. Specifically, the fluctuation area that constitutes the suspicious person detected in the current frame is compared with the fluctuation area that constitutes the suspicious person one frame before, and the movement distance is within a predetermined value. When the sizes are similar, the suspicious person detected in the two frames is recognized as the same body.

  When the control unit 26 detects a suspicious person in the warning zone in the above process, the control unit 26 executes various warning processes according to the zone in which the suspicious person is detected. Specifically, when a suspicious person is detected in the monitoring zone, an image monitoring request is notified to the monitoring center (request notification), and captured images input from the camera 21 are sequentially transmitted. On the other hand, when a suspicious person is detected in the emergency zone, the monitoring center is notified of the occurrence of an emergency (emergency notification), and the captured images input from the camera 21 are sequentially transmitted. At the same time, the speaker 24 is driven to output an alarm sound to the surroundings.

  Further, when a normal confirmation signal is received from the monitoring center 3 in response to the notification of the image monitoring request, the control unit 26 sets a permission flag for the suspicious person being tracked. When a suspicious person is detected in the emergency zone, if the permission flag is set for the suspicious person, the above emergency call is not executed, and only when there is a suspicious person for which no permission flag is set. Execute.

Hereinafter, the operation of the monitoring process in the monitoring device 2 will be described in detail.
FIG. 4 is a flowchart showing a monitoring process that is constantly executed by the monitoring device 2. The monitoring device 2 executes the above-described suspicious person detection process on the captured images sequentially input from the camera 21, and first determines whether or not a suspicious person has been detected in the monitoring zone in the warning zone. (S102). If a suspicious person is not detected in the monitoring zone, it is subsequently determined whether or not a suspicious person is detected in the emergency zone (S118). Until the suspicious person is detected in either the monitoring zone or the emergency zone, the processes of step S102 and step S118 are repeated.

  When a suspicious person is detected in the monitoring zone (Yes in S102), it is determined whether or not the suspicious person is newly detected in the warning zone (S104). When a new suspicious person who is not being tracked is detected, a tracking process for the suspicious person is started (S106). Then, the image monitoring request is notified to the monitoring center 3 (S108), and transmission of the request image is started (S110).

  In the monitoring center 3 that has received the notification of the image monitoring request, the monitoring staff notifies the monitoring staff of the fact, and the monitoring staff continuously confirms the images that are sequentially sent, and the robber who the person detected as the suspicious person intends to commit the crime. It is judged whether it is. If it can be determined that the robber is at first glance, the monitoring person remotely operates the monitoring device 2 to warn the suspicious person to stop the crime. In addition, when it can be determined that it is not a burglar at first glance, or when it is confirmed that the person is not a suspicious person through dialogue through the monitoring device 2, the monitor inputs a normal confirmation operation. At this time, a normal confirmation signal is transmitted from the monitoring center 3 to the monitoring device 2.

  If the monitoring apparatus 2 starts transmitting the request image in step S110 or determines that it is a suspicious person being tracked in step S104, the monitoring apparatus 2 subsequently determines whether or not a monitoring end instruction has been received from the monitoring center (S112). ). When the normal confirmation signal is received, it is determined that there is an instruction to end the monitoring, and then a permission flag is set for the suspicious person currently being tracked (S114). If a plurality of suspicious persons are being detected, a permission flag is set for all of them. At the same time, the transmission of the request image is terminated (S116), and the process returns to S102.

On the other hand, if it is determined in step S112 that a normal confirmation signal has not been received and there is no instruction to end monitoring, it is subsequently determined whether or not a suspicious person has been detected in the emergency zone (S118). Suspicious person detection in the emergency zone may be determined based on a person who has been detected as a suspicious person staying for a predetermined time (for example, 20 seconds).
If no suspicious person is detected in the emergency zone, the process returns to step S102. If a suspicious person is detected in the emergency zone, it is determined whether or not a permission flag is set for the suspicious person (S120). When there is a suspicious person for whom no permission flag is set, an alarm sound is output to notify the occurrence of an emergency (S122) and the monitoring center 3 is notified of the occurrence of an emergency (S124). In addition, transmission of an emergency image is started (S126). When an emergency situation occurs, it is necessary to check and record the appearance and actions of the suspicious person in detail at the monitoring center. Therefore, the emergency image transmitted here has a higher quality than the requested image transmitted in step S110 (for example, , High resolution, high frame rate). Therefore, when the request image is being transmitted, the transmission target is switched to the emergency image.

  The monitoring center that has received the notification of the occurrence of the emergency situation notifies the monitoring staff to that effect. As a result, in response to the request notification in step S108, the monitoring person who is confirming the image recognizes that the suspicious person has approached the safe 10 and warns the suspicious person to stop the crime. Can take.

  In addition, after starting the transmission of the emergency image, the monitoring device 2 continuously transmits the emergency image until receiving an instruction to end the monitoring from the monitoring center 3. When a series of countermeasures by the monitoring center is completed and an instruction to end monitoring is received (Yes in S128), the transmission of the emergency image is ended, and the process returns to step S102 again to continue the monitoring process (S130).

  On the other hand, if the permission flag is set for all suspicious persons detected in the emergency zone in step S120 (Yes in S120), it has already been confirmed in the monitoring center that the person is not a suspicious person. There is no need to make another emergency call. Therefore, the process returns to step S102 and monitoring is continued without making an emergency call.

  As described above, in the monitoring system 1 of the present embodiment, when a suspicious person is detected in the space (emergency zone) in the vicinity of the safe 10 that is the monitoring target, there is a high possibility that the person is a bandit. An alarm is issued and an emergency call is made to the monitoring center 3. On the other hand, if a suspicious person is detected in the outer space (monitoring zone), it cannot be determined as a bandit, so an image monitoring request is issued to the monitoring center 3 without warning. Keep on. Therefore, even when monitoring the space where various persons come and go, the monitoring center 3 can quickly confirm the situation at the site (the action of a suspicious person) and warn that in the event of an emergency. The monitoring center 3 can also recognize it.

Even if a person who is confirmed not to be a suspicious person in the monitoring center 3 approaches the vicinity of the safe 10, no alarm or emergency call is performed. For this reason, it is possible to suppress the monitoring burden on the monitoring center 3 and to prevent the person at the monitoring target site from feeling uncomfortable due to an erroneous alarm output.
In this way, the presence of a suspicious person can be constantly monitored in a monitoring space where a large number of unspecified persons enter and exit, and the presence of a suspicious person can be quickly recognized by a monitoring center.

In the above-described embodiment, the image quality of the request image and the emergency image are different from each other. However, the image quality may be the same as long as the request image can be transmitted with sufficiently high image quality.
Further, in the above embodiment, when a suspicious person detected in the monitoring zone is normally confirmed in the monitoring center, an emergency call is not made even if the suspicious person moves to the emergency zone. It is good also as a structure which makes an emergency call. In this case, the processes of S114 and S120 are omitted in the flowchart of FIG.

DESCRIPTION OF SYMBOLS 1 Monitoring system, 2 Monitoring apparatus, 3 Monitoring center, 4 Communication line, 10 Safe, 21 Camera, 22 Storage part, 23 Microphone, 24 Speaker, 25 Communication part, 26 Control part

Claims (5)

In a suspicious person monitoring device that detects a suspicious person in a warning zone set around a monitoring target and transmits an image of the warning zone to an external monitoring center via a communication line,
An image capturing unit that captures an image by capturing the alert zone;
A suspicious person detecting unit for detecting a suspicious person existing in the alert zone;
When a suspicious person is detected in a monitoring zone other than an emergency zone in the vicinity of the monitoring object in the alert zone, an image monitoring request is notified to the monitoring center, and when a suspicious person is detected in the emergency zone, the monitoring center is notified. An alarm processor that reports the occurrence of an emergency,
A suspicious person monitoring device comprising: In addition, it has an alarm unit that outputs an alarm sound around it,
The suspicious person monitoring apparatus according to claim 1, wherein the warning processing unit does not output the warning sound when reporting the image monitoring request, and outputs the warning sound when reporting the occurrence of an emergency. The suspicious person detection unit tracks the suspicious person detected in the monitoring zone while in the warning zone,
When the alarm processing unit receives a normal confirmation signal from the monitoring center in response to the notification of the image monitoring request, the alarm processing unit notifies the occurrence of the emergency even if the suspicious person being tracked is detected in the emergency zone. The suspicious person monitoring device according to claim 1, wherein the suspicious person monitoring device is not performed.   When the warning processing unit receives the normal confirmation signal, the warning processing unit sets a permission flag for the suspicious person being tracked, and the permission flag is not set for the suspicious person detected in the emergency zone. The suspicious person monitoring device according to claim 3, wherein the emergency occurrence is reported. A suspicious person monitoring device that detects a suspicious person in a warning zone set around a monitoring object and transmits an image of the warning zone, and a monitoring center that receives and displays the transmitted image. In the configured suspicious person monitoring system,
The suspicious person monitoring device is:
An image capturing unit that captures an image by capturing the alert zone;
A suspicious person detection unit that detects a suspicious person existing in the warning zone and tracks the suspicious person while in the warning zone;
When a suspicious person is detected in a monitoring zone other than an emergency zone in the vicinity of the monitored object in the alert zone, an image monitoring request is notified to the monitoring center, and when a suspicious person is detected in the emergency zone, the suspicious person is detected. An alarm processing unit for notifying the monitoring center of the occurrence of an emergency when a normal confirmation signal is not received from the monitoring center for a person,
The monitoring center is
A notification unit for notifying a monitor of the notification of the image monitoring request received from the suspicious person monitoring device and the notification of the occurrence of the emergency;
A display unit for displaying the image received from the suspicious person monitoring device;
An input unit for inputting a normal confirmation operation by a monitoring person,
The suspicious person characterized by transmitting the normal confirmation signal to the suspicious person monitoring apparatus when the normal confirmation operation is input in response to the image monitoring request notification from the suspicious person monitoring apparatus. Monitoring system.

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