JP2023151302A - Monitoring system - Google Patents

Abstract

To provide a monitoring system with which it is possible to further improve the convenience of a legitimate user when conducting face authentication.SOLUTION: A monitoring system 1 for monitoring an intrusion into a monitored area comprises: a plurality of sensors 20 that are arranged at a plurality of positions in a monitored area 50, for detecting an intrusion; storage means 12 that preliminarily stores the registered face images of registrants; acquisition means 161 that acquires an input face image in which the face of a user is imaged; and authentication means 162 that verifies the input face image against the registered face images and authenticates the user on the basis of a prescribed authentication criterion. The authentication means 162 alters the authentication criterion in accordance with the detection state of the sensor 20.SELECTED DRAWING: Figure 4

Description

The present invention relates to a monitoring system.

2. Description of the Related Art Conventionally, a monitoring system has been used that uses various sensors to detect an intruder or the like who has entered a preset monitoring area, and reports the occurrence of an intrusion abnormality to a monitoring center or the like. In particular, in recent years, monitoring systems have been developed that authenticate users by comparing an input facial image of the user's face with a registered facial image.

Patent Document 1 discloses a security system that detects a suspicious object that has entered a monitoring area around a building and issues an alarm. When this security system detects that a moving object has moved between multiple partial areas in which the monitoring area is divided, the mobile object is Determine whether or not the object is a suspicious object.

Japanese Patent Application Publication No. 2011-159041

When using facial recognition in a surveillance system, there is a need to further improve convenience for authorized users.

An object of the present invention is to provide a monitoring system that can further improve convenience for authorized users when performing face authentication.

According to one aspect of the present invention for solving such problems, there is provided a monitoring system that monitors intrusion into a monitoring area, which includes a plurality of sensors arranged at a plurality of positions in the monitoring area to detect intrusion, and a registered sensor. a storage means for storing in advance a registered face image of a user; an acquisition means for acquiring an input face image of the user's face; and authentication means for authenticating a user, and the authentication means provides a monitoring system that changes authentication criteria according to the detection status of the sensor.

This monitoring system further includes a reception means for accepting a user's cancellation operation for canceling the alert mode for monitoring intrusion into the monitoring area, and the authentication means includes a plurality of sensors connected to each other until the reception means accepts the cancellation operation. It is preferable to change the authentication criteria depending on the detection situation.

In this monitoring system, it is preferable that the authentication means changes the authentication standard depending on the time required from when a specific sensor among the plurality of sensors detects a person until the reception means accepts a cancellation operation.

In this monitoring system, it is preferable that the authentication means change the authentication standard so that if the required time satisfies the reference time, the user is more easily authenticated as a user.

In this monitoring system, at least one of the plurality of sensors is placed on the entrance route of the monitoring area to the place where the release operation is performed, and the authentication means is activated when the sensor placed on the entrance route detects a person. In addition, it is preferable to change the authentication criteria so that the user can be easily authenticated as a user.

In this monitoring system, at least one of the plurality of sensors is placed on the entrance route of the monitoring area up to the place where the release operation is performed, and the usage specified based on the detection result of the sensor placed on the entrance route is The authentication means has a determination means for determining whether or not the user's travel route is appropriate, and the authentication means changes the authentication criteria so that when the user's travel route is appropriate, the user is more easily authenticated as the user. It is preferable to do so.

The monitoring system according to the present invention can further improve convenience for authorized users when performing face authentication.

1 is a diagram showing a schematic configuration of a monitoring system 1 according to an embodiment of the present invention. (A) is an example of the data structure of face image information 121, and (B) is an example of the data structure of authentication standard information 122. 3 is an example of a plan view of a monitoring area 50. FIG. 3 is a flowchart illustrating an example of detection processing by the security device 10. FIG. 3 is a flowchart illustrating an example of face verification processing by the security device 10. FIG.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A monitoring system according to an embodiment of the present invention will be described below with reference to the drawings. However, it is to be understood that the invention is not limited to the embodiments described in the drawings or below.

FIG. 1 is a diagram showing a schematic configuration of a monitoring system 1 according to an embodiment of the present invention. The monitoring system 1 monitors the intrusion of a person into a monitoring area including an independent building such as a house, a site where the building is located, a room in an apartment (a type of building), and the like.
As shown in FIG. 1, the monitoring system 1 includes a security device 10, a plurality of sensors 20a, 20b, and 20c, and a security center device 30. In the following, an example will be described in which the sensor 20a is a gate sensor, the sensor 20b is a door sensor, and the sensor 20c is a window sensor. Hereinafter, each sensor 20a, 20b, 20c, etc. may be simply referred to as sensor 20.
The security device 10 is an information processing device that monitors and guards a monitoring area, and is communicatively connected to a plurality of sensors 20 . Furthermore, the security device 10 is communicatively connected to the security center device 30 via a communication network 40 such as the Internet. The security center device 30 may be communicatively connected to a plurality of security devices 10 via the communication network 40.
When the security device 10 receives a detection signal including a sensor ID, which is an identification number assigned to the sensor that detected a person, from the sensor 20, the security device 10 includes information identifying the monitoring area of the security device 10 in the detection signal and sends the detection signal to the security center. The information is transmitted to the device 30.

The security device 10 includes a communication section 11 , a storage section 12 , an operation section 13 , an imaging section 14 , a display section 15 , a control section 16 , and an interface section 17 .

The communication unit 11 has a communication interface circuit that complies with wired/wireless communication standards such as Ethernet (registered trademark) and IEEE802.11, and communicates with the security center device 30 via the communication network 40 to transmit and receive various information. .

The storage unit 12 includes a semiconductor memory, a magnetic storage medium, an optical storage medium, and the like. The storage unit 12 stores computer program codes and various data that are executed by the control unit 16 to control the operation of the security device 10. The computer program can be installed in the storage unit 12 by a known method via a computer-readable storage medium such as a DVD-ROM, a communication line, or the like. The storage unit 12 is an example of storage means.
The storage unit 12 stores face image information 121, authentication reference information 122, reference time, and specific sensor ID. Details of the face image information 121 and the authentication standard information 122 will be described later. The reference time is a time for comparison with the time from when a specific sensor detects a person until the control unit 16 receives a setting operation by the operation unit 13, and has a value larger than 0. The specific sensor ID is a sensor ID assigned to the specific sensor mentioned above.

The storage unit 12 further stores the security mode of the security device 10. The security mode includes a warning mode in which intrusion into the monitoring area is monitored, and a release mode in which intrusion into the monitoring area is not monitored.
The alert mode may include an alert mode and a stay-at-home mode. The warning mode is a mode that is set mainly when no user is present in the monitoring area, and is a mode in which all of the sensors 20 monitor intrusion into the monitoring area. The at-home mode is a mode that is mainly set when the user is present in the monitoring area, and is a mode in which only some sensors 20, such as the door sensor 20b and the window sensor 20c, monitor intrusion into the monitoring area. .
The alert mode may include an outer perimeter alert mode and a partial alert mode. The outer periphery warning mode is a mode in which intrusion into the building from the outer periphery of the building within the monitoring area is monitored using sensors arranged on the outer periphery of the building, such as the door sensor 20b and the window sensor 20c. The partial security mode is a mode in which intrusion is monitored only in a part of the building by a sensor (not shown) placed inside the building.

The operation unit 13 is an operation interface for a user of the security device 10 to operate the security device 10. The operation unit 13 is composed of input devices such as a touch panel display, a keyboard, and a numeric keypad, and receives various operations such as changing the security mode from the user, and outputs signals corresponding to those operations to the control unit 16.
The imaging unit 14 includes a two-dimensional detector constituted by a photoelectric conversion element such as a CCD or CMOS, and an imaging optical system that forms an image of the imaging range on the two-dimensional detector. The imaging unit 14 generates an input facial image of the face of the user operating the operating unit 13 and outputs it to the control unit 16 .
The display unit 15 is composed of a display device such as a liquid crystal display or a touch panel display, and displays whether an abnormality has occurred and various information received from the control unit 16.

The control unit 16 includes a processor such as a CPU or a multiprocessor, and its peripheral circuits. The control unit 16 controls the operation of the security device 10 by executing a computer program stored in the storage unit 12. As the control unit 16, a DSP, LSI, ASIC, FPGA, etc. may be used.
The control unit 16 includes an acquisition means 161, an authentication means 162, and an acceptance means 163 as functional modules of a program running on the processor.

The interface section 17 has an interface circuit conforming to a serial bus standard such as USB, and is communicatively connected to the sensor 20 to transmit and receive various signals. Note that the interface unit 17 may have an interface circuit that conforms to wired/wireless communication standards such as Ethernet (registered trademark), IEEE802.11, Bluetooth (registered trademark), etc. instead of an interface circuit that conforms to the serial bus standard. . A sensor 20 is connected to the interface section 17 .

The sensor 20 is a sensor that outputs a detection signal when it detects a person, and is arranged at a plurality of positions within the monitoring area. The sensor 20 is, for example, a magnetic sensor that is attached to an opening/closing part such as a window or a door, and detects a person operating the opening/closing part by detecting the opening/closing of the opening/closing part, or a magnetic sensor that detects a person operating the opening/closing part by detecting the opening/closing of the opening/closing part, or a magnetic sensor that detects a person operating the opening/closing part by detecting the opening/closing of the opening/closing part. This is an infrared sensor that detects people. Alternatively, the sensor 20 may be an image sensor that detects a person within the imaging range based on a difference signal between a captured image and a normal image stored in advance. The sensor 20 detects an intrusion into the monitoring area by detecting a person.

The security center device 30 is an information processing device that processes detection signals, and upon receiving the detection signal from the security device 10, notifies the guard that an intrusion into the building monitored by the security device 10 has occurred.

FIG. 2(A) is an example of the data structure of the face image information 121. In the face image information 121, for each registrant registered in the monitoring system 1 as a user of a building included in the monitoring area, the registrant ID, registered face image, etc. of each registrant are stored in advance in association with each other. . The registrant ID is an identification number assigned to each registrant. The registered face image is an image of each registrant's face.
FIG. 2(B) is an example of the data structure of the authentication standard information 122. In the authentication standard information 122, for each sensor 20 arranged in the monitoring area, the sensor ID of each sensor 20 and the authentication standard used for authentication are stored in association with each other. The authentication criteria are used to authenticate a user who operates the operation unit 13, and include, for example, a similarity threshold, a frequency threshold, a time threshold, and the like. The authentication criteria stored in the authentication criteria information 122 are an example of predetermined authentication criteria.

The similarity threshold is a threshold for comparing the degree of similarity between the registered face image and the input face image, and when the registered face image and the input face image contain the same person's face. is set to the lower limit of similarity. The number of times threshold is a threshold for comparing the number of times the registered face image and the input face image are matched, and is set as the upper limit of the number of times the registered face image and the input face image can be matched. The time threshold is a threshold for comparing the matching time between the registered face image and the input face image, and is set as the upper limit of the time required to match the registered face image and the input face image.
Each authentication standard is set such that when the corresponding sensor 20 detects a person, the higher the probability that the person is a user of the building, the easier it is to be authenticated as a user. For example, building users are likely to enter the building through a door, which is a normal entry route, and intruders are likely to enter the building through a window. That is, the person detected by the door sensor 20b placed in the entrance route is more likely to be a user of the building than the person detected by the window sensor 20c placed outside the entrance route. Therefore, the authentication criteria corresponding to the sensors arranged on the entrance route are set so that the user can be more easily authenticated as a user than the authentication criteria corresponding to the sensors arranged outside the entrance route.

For example, the similarity threshold corresponding to the door sensor 20b is set to a lower value than the similarity threshold corresponding to the window sensor 20c. Further, the number of times threshold corresponding to the door sensor 20b is set to a higher value than the number of times threshold corresponding to the window sensor 20c. Further, the time threshold corresponding to the door sensor 20b is set to a higher value than the time threshold corresponding to the window sensor 20c. Thereby, the security device 10 can further improve the authentication accuracy when authenticating a user.
Moreover, each authentication standard may be stored not only in association with one sensor ID but also in association with a combination of a plurality of sensor IDs and/or their order (route). For example, the authentication standard corresponding to the combination of the gate sensor 20a and the door sensor 20b is set so that it is easier to be authenticated as a user than the authentication standard corresponding to the combination of the gate sensor 20a and the window sensor 20c. Further, the authentication criteria corresponding to the order of the gate sensor 20a and the door sensor 20b are set so that the user can be more easily authenticated as a user than the authentication criteria corresponding to the order of the gate sensor 20a and the window sensor 20c. With these, the security device 10 can further improve the authentication accuracy when authenticating a user.

The face image information 121 is set by the user using the operation unit 13 and the imaging unit 14. The authentication standard information 122 is set in the security device 10 in advance. Note that the authentication standard information 122 may be changed by the user using the operation unit 13. In this case, authentication standard information 122 may be set for each registrant. In that case, each registrant's authentication criteria information 122 is stored in association with each registrant's registrant ID.

FIG. 3 is an example of a plan view of the monitoring area 50. As shown in FIG. 3, the monitoring area 50 includes a site 51 and a building 52. A gate 53 is provided at the boundary between the outside and the inside of the site 51, and a door 54 and a window 55 are provided at the boundary between the outside and the inside of the building 52. The operating section 13 and the imaging section 14 are arranged inside the building 52. When users of the building 52 return home, they usually move from the outside of the premises 51 to the inside of the building 52 through the gate 53 and door 54, and operate the operation unit 13 to change the security mode from alert mode to release mode. do.
A gate sensor 20a is placed near the gate 53, a door sensor 20b is placed near the door 54, and a window sensor 20c is placed near the window 55. The door sensor 20b is an example of a specific sensor and is placed on the entrance route 56 to the building 52 within the monitoring area 50. That is, the storage unit 12 stores the sensor ID of the door sensor 20b as the specific sensor ID.
Further, the door sensor 20b is also an example of a sensor arranged on the entrance route 56 of the monitoring area 50 to the location of the operation unit 13 for performing a release operation. At least one sensor can be placed on the entrance route of the monitoring area 50 to the place where the release operation is performed.

FIG. 4 is a flowchart illustrating an example of detection processing by the security device 10. This operation flow is executed mainly by the control unit 16 of the security device 10 in cooperation with each element of the security device 10 based on a program stored in advance in the storage unit 12 of the security device 10.

First, the authentication means 162 determines whether any sensor 20 has detected a person (step S11). When the authentication unit 162 receives a detection signal from the sensor 20 via the interface unit 17, it determines that the sensor 20 that transmitted the detection signal has detected a person.

When the sensor 20 detects a person (step S11-Y), the authentication means 162 identifies the sensor ID from the received detection signal and stores it in the storage unit 12 (step S12). The stored sensor ID indicates the detection status of the plurality of sensors 20.
Next, the authentication means 162 determines whether the sensor that detected the person is the door sensor 20b (step S13). If the sensor ID of the door sensor 20b stored in advance in the storage unit 12 as a specific sensor ID matches the sensor ID specified in step S12, the authentication means 162 determines that the sensor that detected the person is the specific sensor. It is determined that
If the sensor that detected the person is a specific sensor (step S13-Y), the authentication means 162 starts measuring time using a timer (step S14).

If the sensor 20 does not detect a person (step S11-N) or if the sensor that detected the intrusion is not a specific sensor (step S13-N), the authentication means 162 advances the process to step S15.

Next, the reception unit 163 determines whether or not the user's operation to change the security mode has been received from the operation unit 13 (step S15). The accepting means 163 accepts a user's operation to set the alert mode or release mode. Accepting the setting operation for the release mode includes receiving a release operation for canceling the alert mode.
If the security mode changing operation has not been accepted (step S15-N), the accepting means 163 does not execute any particular process and returns the process to step S11.
On the other hand, when the change operation of the security mode is received (step S15-Y), the receiving means 163 determines whether the received change operation is a change operation from the release mode to the alert mode or the change operation from the alert mode to the release mode. It is determined whether it is an operation (step S16).

If the received change operation is a change operation from release mode to alert mode (step S16-Y), the reception means 163 sets the authentication standard used in the face matching process, which will be described later, to a predetermined initial value. , the process proceeds to step S21.
If the received change operation is a change operation from alert mode to release mode (step S16-N), the authentication means 162 changes the authentication standard used in the face matching process from the initial value to the sensor ID stored in the process of step S12. (step S18). That is, the authentication means 162 changes the authentication criteria according to the detection status of the sensor 20. The authentication means 162 refers to the authentication standard information 122 and specifies the authentication standard stored in association with the sensor ID stored in the process of step S12. The authentication means 162 changes the authentication standard used in the face matching process to the specified authentication standard.

As described above, the authentication criteria corresponding to the sensors arranged on the entrance route are set so that the user can be more easily authenticated as a user than the authentication criteria corresponding to the sensors arranged outside the entrance route. That is, when the sensor placed in the entrance route detects a person, the authentication means 162 changes the authentication criteria so that the person is more easily authenticated as a user. Thereby, the security device 10 can further improve the authentication accuracy when authenticating a user.

Next, the authentication means 162 determines that the time from when the door sensor 20b detects a person until the reception means 163 accepts the operation to change the security mode, that is, the elapsed time from the start of time measurement in step S14, is the reference time. It is determined whether it is within (step S19). Hereinafter, the time until the receiving means 163 receives the security mode changing operation may be referred to as the operation receiving time. The time required from when a specific sensor detects a person until the accepting means 163 accepts the release operation is an example of the operation acceptance time. The reference time is an example of a time for comparison with the time from when a specific sensor detects a person until the accepting means 163 accepts an operation to change the security mode. The reference time is preset to a time obtained by subtracting a margin from the time from when a person is detected by the sensor 20 disposed within the monitoring area until the security mode setting operation is executed using the operation unit 13.

Note that the authentication means 162 may accept the setting of the reference time. For example, the authentication means 162 accepts the setting of a reference time by the user from the operation unit 13. In addition, the authentication means 162 stores operation reception times when authentication was successful in the past, and sets a time obtained by adding a margin to a statistical value such as the maximum value, average value, or median value of the stored operation reception times as a reference time. May be set. If the user is an elderly person, a child, or the like, there is a possibility that it will take time to move from the position of the sensor 20 to the position of the operating section 13, or it may take time to operate the operating section 13. By accepting the setting of the reference time, the authentication means 162 can set an appropriate reference time for each user, and can improve convenience for the user.

Further, the authentication means 162 may change the reference time for each time period (daytime or nighttime). For example, the users who perform the setting operations may differ depending on the time of day, such as a grandfather performing the setting operations during the day after returning home from a walk, and a mother performing the setting operations at night after returning home from work. By changing the reference time for each time slot, the authentication means 162 can set a reference time that is more suitable for the user, and can further improve convenience for the user.

If the operation reception time is within the reference time (step S19-Y), the authentication means 162 corrects the authentication standard set in the process of step S18 (step S20). The authentication means 162 changes each authentication standard so that the user can be easily authenticated as a user. For example, the authentication unit 162 corrects the similarity threshold to be low, the number of times threshold to be high, and the time threshold to be high. The process in step S20 is an example of a process in which the authentication means 162 changes the authentication standard so that the user can be more easily authenticated when the required time satisfies the reference time.
Since the user of the building knows the location of the operating unit 13, he or she can change the security mode by operating the operating unit 13 immediately after entering the building. On the other hand, since the intruder does not know the location of the operating section 13, it is highly likely that it will take time to reach the operating section 13 after entering the building. By correcting the authentication standard based on the operation acceptance time, the security device 10 can further improve the authentication accuracy when authenticating the user.

If the operation acceptance time is outside the reference time (step S19-N), the authentication means 162 does not execute the process of step S20 and advances the process to step S21.
Note that the authentication means 162 may correct the authentication standard when the operation reception time is outside the reference time, instead of correcting the authentication standard when the operation reception time is within the reference time. In that case, the authentication means 162 sets each authentication standard so that it is difficult to be authenticated as a user. For example, the authentication unit 162 corrects the similarity threshold to be high, the number of times threshold to be low, and the time threshold to be low.

In this way, the authentication means 162 changes the authentication standard according to the time from when a specific sensor among the plurality of sensors 20 detects a person until the reception means 163 accepts the setting operation. Thereby, the security device 10 can further improve the authentication accuracy when authenticating a user.

Next, the authentication means 162 starts face matching processing (step S21), and returns the processing to step S11.

FIG. 5 is a flowchart illustrating an example of face verification processing by the security device 10. This operation flow is executed mainly by the control unit 16 of the security device 10 in cooperation with each element of the security device 10 based on a program stored in advance in the storage unit 12 of the security device 10. Further, this operation flow is started when the authentication means 162 of the security device 10 performs the process of step S21.

First, the acquisition unit 161 acquires an input facial image of the user's face from the imaging unit 14 (step S31).
Next, the authentication means 162 compares the registered face image with the input face image (step S32). Authentication means 162 extracts a face area, which is an area where a person's face is shown, from the input face image. The authentication means 162 performs edge pixel extraction on the input face image using a Sobel filter or the like so that the slope direction of the brightness change can be determined. The authentication means 162 detects an elliptical edge distribution having a predetermined size that approximates the contour shape of the head from the extracted edge pixels, and extracts an area surrounded by the edge distribution as a face area.

The authentication unit 162 calculates, from the storage unit 12, the feature amount of the face area of each registered face image stored in the face image information 121 and the feature amount of the face area extracted from the input face image. For each registered face image stored in the face image information 121, the authentication means 162 calculates the degree of similarity between each registered face image and the input face image from the two calculated feature amounts. The authentication unit 162 calculates, for example, an L2 norm, a normalized cross-correlation value, etc. between the feature amount of each registered face image and the feature amount of the input face image as the degree of similarity.

If the maximum value of the similarities calculated for all the registered face images is equal to or higher than the similarity threshold set in the detection process, the authentication means 162 determines whether the person in the input face image has a similarity It is determined that the user corresponds to the registered face image having the maximum value. In this case, the authentication means 162 determines that the authentication is successful, and authenticates the person operating the operation unit 13 as a user. On the other hand, if the maximum value of the similarities calculated for all registered face images is less than the similarity threshold set in the detection process, the authentication means 162 determines that the person in the input face image is the user. Otherwise, it is determined that the authentication is not successful. In this manner, the authentication means 162 compares each registered facial image with the input facial image to authenticate the user by comparing the degree of similarity between each registered facial image and the input facial image with the similarity threshold.

Next, the authentication means 162 determines whether the authentication was successful (step S33).
If the authentication is successful (step S33-Y), the authentication means 162 changes the security mode of the security device 10 to the security mode corresponding to the change operation received by the reception means 163 in step S15 of the detection process (step S34). ). The authentication means 162 cancels the timer started in the process of step S14 (step S35), and ends the series of processes.

On the other hand, if the authentication is not successful (step S33-N), the authentication means 162 determines whether the number of times face matching has been performed in the face matching process is less than the number of times threshold (step S36). The authentication means 162 determines whether the number of times the process of step S32 has been performed is less than the number of times threshold set in the detection process.

If the number of times the face matching has been performed is less than the predetermined number (step S36-Y), the authentication means 162 determines whether the processing time of the face matching process is less than the time threshold (step S37). The authentication means 162 determines whether the time that has passed since the start of the face matching process is less than the time threshold set in the detection process.
If the processing time of the face matching process is less than the time threshold (step S37-Y), the authentication means 162 returns the process to step S31.
If the number of times the face matching process has been executed is equal to or greater than the number threshold (step S36-N), or if the processing time of the face matching process is equal to or greater than the time threshold (step S37-N), the authentication means 162 authenticates the security device 10. The series of processing ends without changing the security mode (step S38).

Note that the authentication means 162 outputs a detection signal to the security center device 30 if the security mode is not set to the release mode by the time a predetermined period of time has elapsed after starting time measurement in step S14 of the detection process. . As a result, if the intruder is not authenticated as a user, the guard will be notified that an intrusion into the building has occurred.

In this way, the authentication means 162 authenticates the user by comparing the registered face image and the input face image based on the authentication criteria, and changes the authentication criteria according to the detection status of the plurality of sensors 20. Typically, the route a building user takes to enter the building is different from the route an intruder takes to the building. The monitoring system 1 identifies the person's approach route (movement route) based on the position where the person is detected, and determines whether the user's expected approach route and the actual approach route are the same, that is, the user's movement route. By changing (relaxing) the authentication criteria for authenticating a user when the information is appropriate, it is possible to further improve the authentication accuracy when authenticating a user.

In particular, the authentication unit 162 changes the authentication criteria used in the face matching process depending on the detection status of the plurality of sensors 20 until the reception unit 163 accepts the cancellation mode setting operation. Thereby, the monitoring system 1 can prevent the user from taking a long time to perform face verification and erroneously notifying the monitoring staff that an intrusion into the building has occurred when the user cancels the alert mode.

In general, face verification may require time depending on the environment in which the imaging unit 14 is placed, sunlight conditions, and the like. The monitoring system 1 changes the authentication criteria so that when the person to be verified enters the building from the regular entrance route, the face verification of that person is likely to be successful. Thereby, the monitoring system 1 can reduce the possibility that user authentication will fail, while maintaining security, and improve convenience for the user.

In addition, in face authentication, the object (face) is imaged while being away from the imaging section, so compared to fingerprint authentication, vein authentication, etc., in which the object is imaged while in contact with the imaging section, the imaging space is smaller. It is easily influenced by the environment and may not be able to authenticate users correctly. In this embodiment, if face authentication is not successful, a new input face image is used to compare the registered face image with the input face image to determine whether or not the authentication was successful. Users can be correctly authenticated using facial recognition, which is easy to accept.

Further, the sensor arranged in the entrance route is not limited to the door sensor 20b, and may be at least one or more than one. For example, the sensors arranged on the entrance route may include a sensor such as the gate sensor 20a that detects a person outside the building 52, a sensor that detects a person between the door 54 and the operation section 13, and the like.

Furthermore, when the authentication means 162 and the reception means 163 receive the user's operation to change the security mode in step S15, the authentication means 162 and the reception means 163 do not execute the processes from step S16 onwards, but perform any operation using the operation unit 13. In this case, the processes from step S16 onwards may be executed. Further, the processing in steps S19 to S20 may be omitted.

Further, when the warning mode is set and a sensor placed outside the entrance route such as the window sensor 20c detects a person, the authentication means 162 immediately sends a detection signal without waiting for a predetermined period of time to elapse. is output to the security center device 30. Note that even when a sensor placed outside the entrance route detects a person, the authentication means 162 waits for a predetermined time to elapse before detecting the person, in the same way as when a sensor placed outside the entrance route detects a person. The signal may be output to the security center device 30.
In this case, even if the sensor placed outside the entrance route detects a person in step S13 of the detection process, the authentication means 162 starts time measurement using a timer in step S14. In this case, in step S16, the accepting means 163 determines whether or not a timer canceling operation by the user is received from the operation unit 13, and if the timer canceling operation is accepted, in step S18, the authenticating means 162, The authentication standard is changed according to the detection status of the plurality of sensors 20.
If the sensor detected immediately before is a sensor placed inside the building, the authentication means 162 determines that there is a high possibility that the person to be authenticated is a user in the room, so that the person to be authenticated is more likely to be authenticated as a user. Change the certification standards. On the other hand, if the sensor detected immediately before is a sensor placed outside the building, the authentication means 162 determines that there is a high possibility that the person to be authenticated is an intruder, so that it is difficult to authenticate the person as a user. Change certification standards. As a result, the security device 10 can maintain security while preventing intrusion into the building even if a user in the room accidentally opens a window when the perimeter warning mode is set. It is possible to prevent the supervisor from being erroneously notified that the situation has occurred.

Furthermore, by storing the sensor IDs in chronological order in the process of step S12, the authentication means 162 stores the sensor IDs, that is, the detection status (detection result) of the sensor 20, indicating the user's movement route. be able to. Therefore, in the process of step S18, the authentication means 162 determines whether the specified travel route of the user is appropriate based on the detection result of the sensor 20, and changes the authentication criteria according to the determination result. You can also. For example, the authentication means 162 determines that the movement route is appropriate when the value and order of the sensor ID stored in the process of step S12 match the value and order of the sensor ID stored in advance in the storage unit 12. In other cases, it may be determined that the moving route is not appropriate. Instead of the authentication means 162, a determination means may perform this determination.

As described above, various changes can be made within the scope of the present invention according to the embodiment.

1 monitoring system, 12 storage unit (storage means), 20 sensor, 161 acquisition means, 162 authentication means, 163 reception means

Claims (6)

A surveillance system that monitors intrusion into a surveillance area,
a plurality of sensors arranged at a plurality of positions within the monitoring area to detect the intrusion;
a storage means for storing in advance a registered face image of a registrant;
an acquisition means for acquiring an input facial image of a user's face;
an authentication means that authenticates the user by comparing the registered facial image and the input facial image based on a predetermined authentication standard;
The authentication means changes the authentication standard according to the detection status of the sensor.
A monitoring system characterized by: further comprising a reception means for accepting a cancellation operation by a user to cancel a warning mode for monitoring intrusion into the monitoring area;
2. The monitoring system according to claim 1, wherein the authentication means changes the authentication standard according to the detection status of the plurality of sensors until the reception means accepts the cancellation operation. 3. The authentication method according to claim 2, wherein the authentication means changes the authentication standard according to the time required from when a specific sensor among the plurality of sensors detects a person until the reception means accepts the cancellation operation. Surveillance system as described. 4. The monitoring system according to claim 3, wherein the authentication means changes the authentication standard so that the user can be easily authenticated when the required time satisfies a reference time. At least one sensor among the plurality of sensors is arranged on an entrance route of the monitoring area to a place where the release operation is performed,
5. The authentication means according to any one of claims 2 to 4, wherein when a sensor arranged in the entrance route detects a person, the authentication standard is changed so that the person is more easily authenticated as a user. Monitoring system. At least one sensor among the plurality of sensors is arranged on an entrance route of the monitoring area to a place where the release operation is performed,
comprising a determining means for determining whether the user's movement route specified based on the detection result of a sensor arranged in the entrance route is appropriate;
5. The monitoring system according to claim 2, wherein the authentication means changes the authentication criteria so that the user is more easily authenticated when the user's travel route is appropriate.

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