WO2014174737A1 - Dispositif de surveillance, méthode de surveillance et programme de surveillance - Google Patents

Dispositif de surveillance, méthode de surveillance et programme de surveillance Download PDF

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Publication number
WO2014174737A1
WO2014174737A1 PCT/JP2014/000424 JP2014000424W WO2014174737A1 WO 2014174737 A1 WO2014174737 A1 WO 2014174737A1 JP 2014000424 W JP2014000424 W JP 2014000424W WO 2014174737 A1 WO2014174737 A1 WO 2014174737A1
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WIPO (PCT)
Prior art keywords
monitoring device
crowd
monitoring
control unit
sound source
Prior art date
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PCT/JP2014/000424
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English (en)
Japanese (ja)
Inventor
真宏 谷
宝珠山　治
孝文 越仲
亮磨 大網
博義 宮野
Original Assignee
日本電気株式会社
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Publication of WO2014174737A1 publication Critical patent/WO2014174737A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • H04N7/188—Capturing isolated or intermittent images triggered by the occurrence of a predetermined event, e.g. an object reaching a predetermined position
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V20/00—Scenes; Scene-specific elements
    • G06V20/50—Context or environment of the image
    • G06V20/52—Surveillance or monitoring of activities, e.g. for recognising suspicious objects
    • G06V20/53—Recognition of crowd images, e.g. recognition of crowd congestion

Definitions

  • the present invention relates to a monitoring apparatus, a monitoring method, and a monitoring program for controlling a monitoring device according to an input video.
  • Various technologies are known for controlling a monitoring device by remote operation and for automatically controlling the device. For example, a technique for automatically changing the shooting range of a camera without the operator operating the camera is also known.
  • Patent Document 1 describes an image monitoring apparatus that automatically moves a video camera toward a specific monitoring target.
  • the image monitoring apparatus described in Patent Document 1 specifies the direction of a sound source using a plurality of microphones, and changes the imaging direction of the camera to the specified direction.
  • FIG. 8 is an explanatory diagram illustrating an example of a situation in which an abnormal situation has occurred.
  • the main cause of the occurrence of an abnormal situation or the range where the abnormal situation has occurred is referred to as the epicenter of the abnormal situation.
  • the epicenter of an abnormal situation for example, there are criminals with guns and runaway cars.
  • a sound source for example, a scream
  • the epicenter of the abnormal situation is different from the position of the sound source indicating the abnormal situation.
  • the image monitoring apparatus described in Patent Document 1 concentrates monitoring only on the direction of the sound source. Therefore, in the image monitoring apparatus described in Patent Document 1, since the camera cannot be controlled so as to capture a range in which the main cause leading to the generation of the sound source (that is, the epicenter of an abnormal situation) cannot be controlled, There is a problem that the situation regarding can not be monitored properly.
  • an object of the present invention is to provide a monitoring apparatus, a monitoring method, and a monitoring program that can appropriately control a device for monitoring a situation that has occurred.
  • a monitoring apparatus includes a crowd behavior analysis unit that calculates a movement direction of a crowd from an input image in which the crowd is photographed, and a monitoring device control unit that controls a monitoring device according to the calculated movement direction of the crowd. It is provided with.
  • the monitoring method according to the present invention is characterized in that the movement direction of the crowd is calculated from an input image in which the crowd is photographed, and the monitoring device is controlled in accordance with the calculated movement direction of the crowd.
  • a monitoring program controls a monitoring device according to a crowd behavior analysis process for calculating a movement direction of a crowd from an input image in which the crowd is photographed, and the calculated movement direction of the crowd.
  • a monitoring device control process is executed.
  • FIG. FIG. 1 is a block diagram showing a configuration example of a first embodiment of a monitoring apparatus according to the present invention.
  • the monitoring apparatus of this embodiment includes a crowd behavior analysis unit 11, a monitoring device control unit 13, and a monitoring device 30.
  • the monitoring device 30 is various devices used for monitoring.
  • the monitoring device 30 is a camera that captures a monitoring range or a microphone that collects sound in the monitoring range will be described as an example.
  • the monitoring device 30 is not limited to a camera or a microphone.
  • the monitoring device 30 may be, for example, a vibration sensor that detects movement of a monitoring target, a temperature sensor that measures a human body temperature, an object temperature, or the like.
  • the monitoring apparatus illustrated in FIG. 1 describes only one monitoring device 30, the number of the monitoring devices 30 is not limited to one and may be two or more.
  • the monitoring apparatus may include a plurality of monitoring devices 30 of the same type.
  • the monitoring apparatus may include a plurality of cameras and a plurality of microphones.
  • the monitoring device itself does not have to include the monitoring device 30.
  • the monitoring device 30 may be configured to control the monitoring device 30 connected via a communication network.
  • a camera is used as the monitoring device 30, and the camera inputs the captured video to the crowd behavior analysis unit 11.
  • the crowd behavior analysis unit 11 analyzes the behavior of the crowd from an input video obtained by photographing the crowd. Specifically, the crowd behavior analysis unit 11 calculates the movement direction of the crowd and the movement change amount (speed) from the input video.
  • the crowd is a set of individuals to be monitored.
  • the individuals to be monitored include not only a single person but also a person who moves on a car, a motorcycle, a bicycle, or the like.
  • the crowd behavior analysis unit 11 may determine, for example, a group of monitoring targets as a crowd after recognizing each monitoring target. In addition, the crowd behavior analysis unit 11 may learn a crowd pattern appearing in the video in advance and compare the pattern with the input video to determine the crowd.
  • the crowd behavior analysis unit 11 may calculate the movement direction and movement change amount of the crowd based on, for example, video feature values calculated from the input video. At this time, the crowd behavior analysis unit 11 may use information representing an apparent movement, such as an optical flow, as the video feature amount. Then, the crowd behavior analysis unit 11 inputs the calculated movement direction and movement change amount of the crowd to the monitoring device control unit 13.
  • the method by which the crowd behavior analysis unit 11 calculates the movement direction and movement change amount of the crowd is not limited to the above method. If the method can identify the movement of the crowd from the input video, the crowd behavior analysis unit 11 may calculate the movement direction and the movement change amount of the crowd using other methods.
  • the monitoring device control unit 13 controls the monitoring device 30 based on the movement direction of the crowd input from the crowd behavior analysis unit 11.
  • controlling the monitoring device 30 means operating according to the function of each monitoring device, or switching the control from the plurality of monitoring devices 30 to a device that performs monitoring.
  • controlling the monitoring device 30 so as to be able to monitor a certain direction means that the monitoring device 30 is operated so that an event in a certain direction can be detected based on the function of each monitoring device.
  • the monitoring device control unit 13 performs control to switch from the direction currently monitored by the monitoring device 30 to the direction to be monitored. Also good. Even when the monitoring device 30 itself does not have the function of changing the monitoring direction, when the monitoring device 30 monitors various directions using the plurality of monitoring devices 30, the monitoring device control unit 13 Control may be switched from among the monitoring devices 30 to the monitoring device 30 that can monitor the direction to be monitored.
  • the monitoring device control unit 13 changes the range that the monitoring device 30 captures according to the movement direction of the crowd.
  • the monitoring device control unit 13 changes the sensitivity of the monitoring device 30 according to the moving direction of the crowd.
  • the monitoring device control unit 13 may start control of sensors existing in a direction corresponding to the movement direction of the crowd.
  • FIG. 2 is an explanatory diagram showing an example of a method for controlling the monitoring device 30 based on the movement direction of the crowd.
  • the crowd 41 moves in the moving direction m1 while producing the sound 51
  • the crowd 42 moves in the moving direction m2 while producing the sound 51 due to the occurrence of the epicenter 50 of the abnormal situation.
  • a camera and a microphone are installed as the monitoring device 30, the camera captures the crowd 41, and the microphone particularly collects sound in the direction of the crowd 41.
  • the crowd behavior analysis unit 11 calculates that the crowd 41 is moving in the movement direction m 1, and the movement direction m 1 of the crowd 41 is input to the monitoring device control unit 13.
  • the monitoring device control unit 13 may control the monitoring device 30 so as to monitor a direction spatially opposite to the moving direction of the crowd. That is, it can be said that the method illustrated in FIG. 2 is a method for monitoring the epicenter of the abnormal situation (the direction of the movement of the crowd).
  • the monitoring device control unit 13 may control the camera so as to change the shooting range in a direction opposite to the moving direction of the crowd.
  • the monitoring device control unit 13 may control the microphone so as to increase the sensitivity in the direction opposite to the movement direction of the crowd.
  • the monitoring device control unit 13 may change the shooting range in a direction opposite to the movement direction of the crowd to a range that can be shot by the camera.
  • the shooting range may be changed to an extent that is out of the shooting range.
  • the crowd behavior analysis unit 11 calculates the movement direction of the crowd for each image captured by each camera, and the movement direction of the plurality of crowds is sent to the monitoring device control unit 13. You may enter. And the monitoring device control part 13 may control a camera so that the range which overlaps in the direction opposite to the moving direction of each crowd may be made into an imaging
  • the monitoring device control unit 13 may control the directivity of each microphone so that the sound in the direction opposite to the movement direction of the crowd can be detected. By performing such control, the sound of the epicenter of an abnormal situation can be detected with higher accuracy.
  • the monitoring device control unit 13 controls a camera that captures a direction opposite to the movement direction of the crowd, or a microphone having high sensitivity in the direction opposite to the movement direction of the crowd. May be switched. By performing such control, even when the monitoring device 30 that cannot change the shooting range and the sound collection sensitivity is used, the situation that has occurred can be appropriately monitored.
  • the monitoring device control unit 13 may control not only to change the shooting range and sensitivity in the direction opposite to the movement direction of the crowd, but also to change the monitoring accuracy of the monitoring device 30.
  • the monitoring device control unit 13 may control the camera to zoom up (for example, in a direction opposite to the moving direction of the crowd).
  • the monitoring device control unit 13 may control the microphone so as to increase the volume (for example, in the direction opposite to the moving direction of the crowd). Note that other methods by which the monitoring device control unit 13 controls the microphone will be described later.
  • the method in which the monitoring device control unit 13 controls the monitoring device 30 based on the movement direction of the crowd has been described.
  • the movement of the crowd in a certain direction is a phenomenon that occurs even in a steady state.
  • the monitoring device control unit 13 controls the monitoring device 30 not only in the movement direction of the crowd but also when the movement change amount satisfies a predetermined criterion (for example, when the movement change amount is larger than a predetermined threshold). You may do it. By doing in this way, the situation which should be monitored can be grasped more appropriately.
  • the method of controlling the monitoring device 30 so that the monitoring device control unit 13 can monitor the direction opposite to the movement direction of the crowd has been described.
  • the method by which the monitoring device control unit 13 controls the monitoring device 30 is not limited to a method that enables monitoring in the direction opposite to the movement direction of the crowd.
  • the monitoring device control unit 13 may control the monitoring device 30 so that the moving direction of the crowd can be monitored.
  • FIG. 3 is an explanatory diagram showing an example of another method for controlling the monitoring device 30 based on the movement direction of the crowd.
  • the method illustrated in FIG. 3 is different from the method illustrated in FIG. 2 in that the monitoring device controller 13 controls the monitoring device 30 so that the movement direction of the crowd can be monitored. That is, it can be said that the method illustrated in FIG. 3 is a method for monitoring whether the range 52 in the evacuation direction of the crowd is safe.
  • the monitoring device control unit 13 may control the camera so as to change the shooting range in the moving direction of the crowd.
  • the monitoring device control unit 13 may control the microphone so as to increase the sensitivity in the movement direction of the crowd.
  • the monitoring device control unit 13 may control the monitoring device 30 so as to monitor a predetermined direction with respect to the movement direction of the crowd.
  • the monitoring device control unit 13 controls the monitoring device 30 so that it can monitor both the movement direction of the crowd and the direction opposite to the movement direction of the crowd. May be. Specifically, the monitoring device control unit 13 controls the camera so that the shooting accuracy of the range along the movement direction of the crowd out of the range shot by the camera capable of shooting at 360 degrees is higher. Good.
  • the monitoring device control unit 13 may perform control to switch to a camera that captures the moving direction of the crowd and a camera that captures a direction opposite to the moving direction of the crowd. Good.
  • the monitoring device control unit 13 reciprocates the movement direction of the crowd and the direction opposite to the movement direction of the crowd so as to capture both ranges. May be controlled. These controls are also applicable to a microphone.
  • the monitoring device control unit 13 controls the monitoring device 30 to give identification information indicating the content of the data to the data (for example, video data, sound data, etc.) acquired by each monitoring device 30. Also good.
  • the monitoring device control unit 13 may add labels such as “crowd movement source” and “crowd movement destination”, a device ID, a position where the monitoring device is installed, and the like as identification information to each data. .
  • the monitoring device control unit 13 displays information indicating the event (for example, “abnormal situation (Seismic source ”,“ crowd destination area ”,“ flash detection ”, etc.), likelihood of the event, etc. may be attached to each data. By giving such identification information, it becomes easy to later extract necessary information from the monitoring data.
  • the crowd behavior analysis unit 11 and the monitoring device control unit 13 are realized by a CPU of a computer that operates according to a program (monitoring program).
  • the program may be stored in a storage unit (not shown) of the monitoring device, and the CPU may read the program and operate as the crowd behavior analysis unit 11 and the monitoring device control unit 13 according to the program.
  • the crowd behavior analysis unit 11 and the monitoring device control unit 13 may each be realized by dedicated hardware.
  • FIG. 4 is a flowchart illustrating an operation example of the monitoring apparatus according to the present embodiment.
  • a camera that is one of the monitoring devices 30 captures a video of the monitoring range and inputs the captured video to the crowd behavior analysis unit 11 (step S11).
  • the crowd behavior analysis unit 11 identifies the crowd from the input video and calculates the movement direction of the crowd (step S12). At this time, the crowd behavior analysis unit 11 may also calculate the movement change amount of the crowd.
  • the monitoring device control unit 13 controls the monitoring device 30 according to the calculated moving direction (step S13). At this time, the monitoring device control unit 13 may control the monitoring device 30 when the calculated movement change amount satisfies a predetermined criterion.
  • the crowd behavior analysis unit 11 calculates the movement direction of the crowd from the input video in which the crowd is photographed, and the monitoring device control unit 13 calculates the calculated movement direction of the crowd. Accordingly, the monitoring device 30 is controlled. Therefore, it is possible to appropriately control the device for monitoring the situation that has occurred.
  • the monitoring apparatus controls the monitoring device by calculating the moving direction of the crowd from an image of the crowd taken. Therefore, even when the range that can be monitored by each device is narrow, the situation that has occurred can be appropriately monitored.
  • Embodiment 2 a second embodiment of the monitoring device according to the present invention will be described. Similar to the monitoring apparatus of the first embodiment, the monitoring apparatus of the present embodiment appropriately controls a device for monitoring a situation that has occurred. Furthermore, when the crowd moves together with the sound sources detected from the monitoring range, the monitoring device according to the present embodiment can appropriately monitor the cause of the movement of the crowd (that is, the epicenter). is there.
  • FIG. 5 is a block diagram showing a configuration example of the second embodiment of the monitoring apparatus according to the present invention.
  • symbol same as FIG. 1 is attached
  • subjected and description is abbreviate
  • the monitoring apparatus of this embodiment includes a crowd behavior analysis unit 11, an environmental sound analysis unit 12, a monitoring device control unit 13, and a monitoring device 30. That is, the monitoring device of the present embodiment is different from the monitoring device of the first embodiment in that the environmental sound analysis unit 12 is provided.
  • a microphone is also used as the monitoring device 30, and the microphone collects sound within the monitoring range (hereinafter referred to as environmental sound) and inputs the sound to the environmental sound analysis unit 12.
  • the environmental sound analysis unit 12 analyzes sound sources included in the sound in the monitoring range (that is, environmental sound). Specifically, the environmental sound analysis unit 12 analyzes the sound source detected from the monitoring range, determines the direction of the sound source, and identifies the type of the sound source, the volume of the sound of the sound source, and the like.
  • the result of identifying the content of the sound source such as the type of the sound source and the volume of the sound source, will be referred to as a sound source identification result.
  • the environmental sound analysis unit 12 may analyze a sound source indicating an abnormal situation, for example.
  • sound sources that indicate an abnormal situation include screams, automobile sounds (for example, engine sounds, exhaust sounds, slip sounds, etc.), various explosion sounds, gunshots, and glass breaking sounds. Note that a method for determining the direction of a sound source and a method for identifying the content of a sound source based on the sound collection result are widely known, and thus detailed description thereof is omitted here.
  • the environmental sound analysis unit 12 may periodically input an analysis result regarding the sound source such as a sound source direction and a sound source identification result to the monitoring device control unit 13.
  • an analysis result regarding the sound source such as a sound source direction and a sound source identification result
  • the environmental sound analysis unit 12 recognizes a predetermined type of sound source (for example, a sound source indicating an abnormal situation)
  • the environmental sound analysis unit 12 inputs the result of recognizing the sound source and the direction of the sound source to the monitoring device control unit 13. May be.
  • the environmental sound analysis unit 12 is realized by a CPU of a computer that operates according to a program (monitoring program), for example.
  • the monitoring device control unit 13 controls the monitoring device 30 based on the direction of the sound source input from the environmental sound analysis unit 12 or the sound source identification result. For example, the monitoring device control unit 13 may start processing of each monitoring device 30 in the case of a predetermined type of sound source such as a sound source indicating an abnormal situation.
  • the monitoring device control unit 13 may determine which of the movement directions of the crowd is controlled so that the monitoring device 30 can be monitored based on the sound source identification result.
  • the monitoring device control unit 13 may control the directivity of each microphone so that the sound of the direction of the input sound source can be detected more. By performing such control, the superdirective microphone function can be realized, so that the sound monitoring accuracy of the sound source can be further increased.
  • the monitoring device control unit 13 may start shooting when a sound source identification result indicating that a predetermined type of sound source is detected is input. Moreover, the monitoring device control part 13 may perform control which changes the imaging
  • the monitoring device control unit 13 may start sensor processing based on the sound source identification result.
  • the monitoring device control unit 13 may control not only to turn on / off the monitoring device 30 but also to change the monitoring accuracy of the monitoring device 30.
  • the monitoring device control unit 13 may control the monitoring device 30 so as to change the accuracy of sound collection.
  • the monitoring device control unit 13 may change the data format based on the sound source identification result. For example, when the sound of the identified sound source is small, the monitoring device control unit 13 may control the monitoring device 30 to change the number of quantization bits (for example, change from 16 bits to 24 bits). For example, when it is determined that it is necessary to detect a high frequency sound according to the identification result, the monitoring device control unit 13 changes the sampling rate (for example, sampling from 16 kHz to CD sound quality (44. The monitoring device 30 may be controlled to change to sampling at 1 kilohertz). By performing such control, the content of the generated sound source can be monitored more appropriately.
  • the number of quantization bits for example, change from 16 bits to 24 bits.
  • the monitoring device control unit 13 changes the sampling rate (for example, sampling from 16 kHz to CD sound quality (44.
  • the monitoring device 30 may be controlled to change to sampling at 1 kilohertz). By performing such control, the content of the generated sound source can be monitored more appropriately.
  • FIG. 6 is a flowchart illustrating an operation example of the monitoring apparatus according to the present embodiment. In this operation example, it is assumed that a camera and a microphone are used for the monitoring device 30.
  • the environmental sound analysis unit 12 analyzes the environmental sound and determines whether or not a sound source indicating an abnormal situation is included (step S21). When it is determined that the sound source indicating an abnormal situation is not included in the environmental sound (No in step S21), the environmental sound analysis unit 12 repeats the process of step S21. On the other hand, if the environmental sound includes a sound source indicating an abnormal situation (Yes in step S21), the environmental sound analysis unit 12 inputs the direction of the sound source and the sound source identification result to the monitoring device control unit 13 (step) S22).
  • the monitoring device control unit 13 performs control to change the shooting range of the camera based on the input direction of the sound source so that the camera as the monitoring device 30 can capture the direction of the sound source (step S23).
  • the camera captures an image of the shooting range and inputs the captured image to the crowd behavior analysis unit 11 (step S24). Thereafter, the operation of calculating the movement direction of the crowd from the input video and controlling the monitoring device 30 is the same as the processing from step S12 to step S13 illustrated in FIG.
  • the environmental sound analysis unit 12 analyzes the sound source detected from the monitoring range, calculates at least one of the direction of the sound source and the sound source identification result, and the monitoring device.
  • the control unit 13 controls the monitoring device 30 based on the direction of the sound source or the sound source identification result. Therefore, in addition to the effect of the first embodiment, it is possible to more appropriately determine whether or not the event should be monitored.
  • the environmental sound analysis unit 12 analyzes the environmental sound, the analysis result can be used as a trigger for monitoring various events.
  • FIG. 7 is a block diagram showing an overview of the monitoring apparatus according to the present invention.
  • the monitoring apparatus according to the present invention includes a crowd behavior analysis unit 81 (for example, a crowd behavior analysis unit 11) that calculates a movement direction of the crowd from an input video in which the crowd is photographed, and a calculated crowd movement direction. And a monitoring device control unit 82 (for example, the monitoring device control unit 13) that controls the monitoring device (for example, the monitoring device 30, a camera, a microphone, and the like).
  • a crowd behavior analysis unit 81 for example, a crowd behavior analysis unit 11
  • a monitoring device control unit 13 controls the monitoring device (for example, the monitoring device 30, a camera, a microphone, and the like).
  • the monitoring device control unit 82 may control the monitoring device so that the calculated movement direction of the crowd or a direction opposite to the movement direction can be monitored. For example, by controlling the monitoring device so that the movement direction of the crowd can be monitored, it is possible to monitor whether the range of the evacuation direction of the crowd is safe. Further, for example, by controlling the monitoring device so that the direction opposite to the movement direction of the crowd can be monitored, the epicenter of the abnormal situation (the movement direction of the crowd) can be monitored.
  • the monitoring device analyzes a sound source detected from the monitoring range and calculates at least one of the sound source identification result indicating the direction of the sound source and the content of the sound source (for example, the environmental sound analysis unit) 12) may be provided.
  • the monitoring device control unit 82 may control the monitoring device based on the direction of the sound source or the sound source identification result. With such a configuration, it is possible to more appropriately determine whether or not the event should be monitored. Furthermore, with such a configuration, the analysis result by the sound source analysis unit can be used as a trigger for monitoring various events.
  • the monitoring device control unit 82 may control the monitoring device when the sound source identification result indicates the content of a predetermined sound source (for example, a sound source indicating an abnormal situation). Even with such a configuration, an event to be monitored can be determined more appropriately.
  • a predetermined sound source for example, a sound source indicating an abnormal situation
  • the crowd behavior analysis unit 81 calculates the movement change amount of the crowd from the input video, and the monitoring device control unit 82 determines that the movement change amount satisfies a predetermined criterion (for example, the movement change amount has a predetermined threshold value).
  • the monitoring device may be controlled. With such a configuration, an event to be monitored can be determined more appropriately.
  • the monitoring device control unit 82 identifies a direction to be monitored according to the calculated movement direction of the crowd, and switches control from a plurality of monitoring devices to a monitoring device capable of monitoring the direction to be monitored. May be. With such a configuration, even if the monitoring device itself cannot change the monitoring range, the range in which the event has occurred can be appropriately monitored by linking a plurality of monitoring devices.
  • the monitoring device control unit 82 identifies the direction to be monitored according to the calculated movement direction of the crowd, and switches the monitoring direction from the direction currently monitored by the monitoring device to the direction to be monitored. Control may be performed. With such a configuration, if the monitoring device itself can change the monitoring range, the range in which the event has occurred can be appropriately monitored.
  • the monitoring device control unit 82 may give identification information indicating the content of the data to the data acquired by the monitoring device by controlling the monitoring device. By giving such identification information, it becomes easy to later extract necessary information from the monitoring data.
  • the monitoring device may be an imaging device (for example, a camera) that can capture the monitoring range.
  • the crowd behavior analysis unit 81 calculates the movement direction of the crowd from the input video imaged by the imaging device, and the monitoring device control unit 82 determines the shooting range of the imaging device according to the calculated movement direction of the crowd. May be controlled.

Abstract

Selon l'invention, un dispositif de surveillance comprend une unité d'analyse de comportement de foule (81) et une unité de commande de dispositif de surveillance (82). L'unité d'analyse de comportement de foule (81) calcule la direction dans laquelle une foule se déplace grâce à une entrée vidéo effectuant l'imagerie de ladite foule, et l'unité de commande de dispositif de surveillance (82) commande un dispositif de surveillance en fonction de la direction calculée d'un mouvement de foule.
PCT/JP2014/000424 2013-04-26 2014-01-28 Dispositif de surveillance, méthode de surveillance et programme de surveillance WO2014174737A1 (fr)

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JP2023502816A (ja) * 2020-10-30 2023-01-26 深▲セン▼市商▲湯▼科技有限公司 現場監視方法及び装置、電子機器、記憶媒体並びにプログラム
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