WO2022059500A1 - Système de surveillance et procédé de surveillance - Google Patents

Système de surveillance et procédé de surveillance Download PDF

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Publication number
WO2022059500A1
WO2022059500A1 PCT/JP2021/032264 JP2021032264W WO2022059500A1 WO 2022059500 A1 WO2022059500 A1 WO 2022059500A1 JP 2021032264 W JP2021032264 W JP 2021032264W WO 2022059500 A1 WO2022059500 A1 WO 2022059500A1
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WO
WIPO (PCT)
Prior art keywords
camera
image
area
worker
monitoring system
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Application number
PCT/JP2021/032264
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English (en)
Japanese (ja)
Inventor
幸 藤井
辰行 澤野
豊彦 林
Original Assignee
株式会社日立国際電気
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社日立国際電気 filed Critical 株式会社日立国際電気
Priority to JP2022550457A priority Critical patent/JP7354461B2/ja
Publication of WO2022059500A1 publication Critical patent/WO2022059500A1/fr

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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
    • G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • 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

Definitions

  • the present invention relates to a monitoring system that detects an intruder in a monitoring area.
  • Patent Document 1 a map of a monitoring area is displayed on a monitoring screen, a movement locus line of an intruder is displayed on the map, and when an arbitrary position coordinate on the movement locus line is selected, the position is displayed.
  • a surveillance system that reproduces a recorded image of a surveillance camera according to coordinates is disclosed.
  • the planned work range is wide or the surrounding brightness is insufficient, the visible range of the worker will be narrower than the planned work range, so there is a possibility that intruders may be overlooked.
  • the planned work range is wide or the surrounding brightness is insufficient, the visible range of the worker will be narrower than the planned work range, so there is a possibility that intruders may be overlooked.
  • a long section of several hundred meters to several kilometers is the planned work range, so that the worker cannot visually monitor the entire planned work range.
  • the present invention has been made in view of the above-mentioned conventional circumstances, and an object of the present invention is to provide a monitoring system capable of reducing oversight of intruders while preventing false detection of workers. And.
  • the monitoring system is configured as follows. That is, in a monitoring system that detects an intruder into the monitoring area, a camera that captures the surveillance area, an image processing device that performs detection processing of the intruder using the captured image of the camera, and predetermined work are performed in the monitoring area.
  • the image processing device includes a positioning terminal carried by the worker, and the image processing device sets an area including the coordinates corresponding to the position positioned by the positioning terminal in the captured image of the camera as a non-target area for intruder detection processing. It is characterized by doing.
  • the non-target area may be an area based on at least one of the work range or the viewing range set for the worker, centering on the coordinates corresponding to the position positioned by the positioning terminal.
  • the non-target area may be adjusted based on the illuminance of the shooting range of the camera, the posture of the worker, and one or more of the equipment brought in by the worker.
  • the image processing device excludes the region corresponding to the protruding region in the image captured by the camera adjacent to the camera from the target of the intruder detection processing. It may be set in the area.
  • the present invention it is possible to provide a monitoring system capable of reducing oversight of intruders while preventing erroneous detection of workers.
  • FIG. 1 It is a figure which shows the schematic structure of the monitoring system which concerns on one Embodiment of this invention. It is a figure which shows the configuration example of the image processing apparatus in the monitoring system of FIG. It is a figure which shows the flowchart example of the intruder detection process. It is a figure which shows the flowchart example of the mask image creation process. It is a figure explaining the mask image created by the mask image creation process.
  • FIG. 1 shows a schematic configuration of a monitoring system according to an embodiment of the present invention.
  • the monitoring system of this example is a system that monitors by analyzing an image taken by a camera, and includes a camera 11, an image processing device 12, a display terminal 13, and a GPS (Global Positioning System) terminal 14. ,
  • the illuminance meter 15 is provided.
  • the camera 11, the GPS terminal 14, and the illuminance meter 15 are communicably connected to the image processing device 12 via a wired or wireless network.
  • the camera 11 is an imaging device for photographing the surveillance area, and a plurality of cameras 11 are installed so as to cover the entire surveillance area.
  • a visible light camera may be used, an infrared camera may be used, or both of them may be used.
  • the camera 11 transmits the captured image to the image processing device 12 by using the image output interface (I / F) of the digital signal system or the analog signal system.
  • the image processing device 12 performs various image processing on the captured image received from the camera 11 and transmits the processed output image to the display terminal 13. Further, the image processing device 12 performs intruder detection processing for detecting an intruder in the monitoring area based on the captured image received from the camera 11, and outputs an alarm signal when the intruder is detected. ..
  • the display terminal 13 is equipped with a VMS (video management system), and responds to the display of the output image processed by the image / image processing device 12 taken by the camera 11 and the alarm output from the image processing device 12. Sounds an alarm / displays an alarm, etc.
  • VMS video management system
  • the GPS terminal 14 is a device for positioning the current position, and periodically notifies the image processing device 12 of the measured current position.
  • the GPS terminal 14 is carried by each of the workers scheduled to work in the monitoring area or by a representative.
  • the illuminance meter 15 is a sensor that measures the illuminance in the surroundings, and periodically notifies the image processing device 12 of the measured illuminance.
  • a plurality of illuminance meters 15 are installed so as to correspond to the shooting range of each camera 11. It should be noted that each camera 11 may be provided with an illuminance meter 15.
  • FIG. 2 shows a configuration example of the image processing device 12.
  • the image processing device 12 includes an image input I / F 21, a processing memory 22, a CPU (Central Processing Unit) 23, a program memory 24, an image output I / F 25, and a communication I / F 26, which are buses 27. Is connected by.
  • the image input I / F 21 is an interface for inputting a captured image transmitted from the camera 11, and stores the input captured image in the processing memory 22.
  • the processing memory 22 has an image memory area 31, a mask image memory area 32, and a work memory area 33.
  • the image memory area 31 is a captured image input through the image input I / F 21 (for example, an image to be detected for an intruder or a background image required for the next intruder detection), or an output image subjected to image processing. It is a memory area that temporarily stores such things.
  • the mask image memory area 32 is a memory area for storing a mask image that defines a target area / non-target area for intruder detection.
  • the mask image a binary image in which the target area (non-mask area) for intruder detection is a white value and the non-target area (mask area) for intruder detection is a black value is used, but the present invention is not limited to this. ..
  • the work memory area 33 is a working memory area that is temporarily used when the intruder detection process is performed.
  • the CPU 23 performs various processes including an intruder detection process by executing a program stored in the program memory 24.
  • the program memory 24 is a memory for storing a program for realizing each function related to intruder detection processing.
  • functions related to intruder detection processing it has an object detection function 41, a posture detection function 42, a GPS reception function 43, an illuminance reception function 44, and an action range acquisition function 45.
  • the image output I / F 25 is an interface that converts the output video stored in the image memory 203 into a form that can be displayed on the monitor of the image processing device 12 or the display terminal 13 and outputs the image.
  • the communication I / F 26 is an interface for communicating with an external device including a GPS terminal 14 and an illuminance meter 15.
  • FIG. 3 shows an example of a flowchart of the intruder detection process executed by the image processing device 12.
  • the shooting range and the basic mask image of the camera 11 are preset for each of the cameras 11, and the information is registered in the image processing device 12.
  • the information (for example, the terminal ID) of the GPS terminal 14 to be carried by each worker is registered in the image processing device 12.
  • the information (for example, the size) of the brought-in equipment is also registered in the image processing apparatus 12.
  • the image processing device 12 first determines whether the intruder detection activation setting is ON or OFF (step S11). In the case of setting that intruder detection is OFF, that is, intruder detection is not performed, no particular processing is performed. On the other hand, in the case of setting to execute intruder detection ON, that is, intruder detection, the intruder detection process is performed as follows.
  • the image taken by the camera 11 is acquired by the image input I / F21 and saved in the image memory 31 (step S12). Further, the GPS receiving function 43 acquires GPS information from the GPS terminal 14 carried by the worker during maintenance work, and saves the latitude / longitude data of the worker in the work memory 33 (step S13). When GPS information is not received from the GPS terminal 14, a code indicating "no GPS information" is stored in the work memory 33 instead of the latitude / longitude data. Further, the illuminance receiving function 44 acquires illuminance data from the illuminance meter 15 corresponding to the shooting range of the camera 11 and stores it in the work memory 33 (step S14).
  • the posture detection function 42 detects the posture of the worker at the position indicated by the GPS information (step S15).
  • the posture detection function 42 detects the posture of the worker at the position indicated by the GPS information (step S15).
  • the posture detection function 42 detects the posture of the worker at the position indicated by the GPS information (step S15).
  • a sample of a downward posture is learned in advance by skeleton detection or AI learning in the image processing device 12, and a worker whose similarity with the trained sample is equal to or higher than a predetermined value is defined as a downward posture. judge.
  • the time in the downward posture hereinafter referred to as the downward continuation time
  • the downward duration is cleared.
  • the determination of whether or not the posture is downward may be performed by another method.
  • a method of determining a downward posture when a downward line of sight of a predetermined angle or more is detected by a camera with a line-of-sight sensing function attached to a worker's helmet, or a method of attaching to a worker's helmet can be mentioned.
  • a mask image creation process is performed for each camera (step S16).
  • the target area / non-target area for intruder detection in the image taken by the camera 11 is determined based on the information obtained by the GPS reception function 43, the illuminance reception function 44, and the posture detection function 42. , Create a mask image that represents these areas as an image.
  • the object detection function 41 analyzes the images taken by each camera 11 to determine the presence or absence of an intruder in the monitoring area (step S17).
  • the object instead of detecting the object from the entire image taken by the camera 11, the object is detected only from the target area of the intruder detection defined by the mask image, and the detected object is determined to be an intruder. do. That is, the object is not detected from the area outside the target of the intruder detection defined by the mask image.
  • an object is detected from the entire image taken by the camera 11, and an object in which an object is detected in the target area of intruder detection is determined to be an intruder, but is not subject to intruder detection.
  • the detection of an object included in a captured image can be determined by using a general object detection method such as a background subtraction method, an interframe subtraction method, and object recognition using learning.
  • an output image to be displayed on the monitor of the image processing device 12 or the display terminal 13 is created (step S18).
  • the output image is an image obtained by superimposing additional information such as information indicating the shooting area and information indicating the presence or absence of an intruder on the image taken by the camera 11.
  • the created output image is displayed on the monitor or display terminal 13 of the image processing device 12 through the image output I / F25 (step S19).
  • the output image obtained for each camera may be divided into a plurality of display areas and displayed simultaneously, or may be switched and displayed at regular time intervals.
  • the detection result (presence or absence of an intruder) by the object detection function 41 is determined (step S20), and if it is determined that there is an intruder, an alarm is output to the display terminal 13 through the communication I / F 26 (step). S21). As a result, the display terminal 13 sounds an alarm / displays an alarm, and notifies the observer of the detection of an intruder.
  • FIG. 4 shows an example of a flowchart of the mask image creation process.
  • the mask image creation process will be described with a focus on one camera (hereinafter referred to as a target camera).
  • step S31 it is determined whether or not GPS information has been received from the GPS terminal 14 carried by the maintenance worker (step S31).
  • the latitude / longitude data of the GPS terminal 14 (worker) stored in the work memory 33 is confirmed, and it is determined whether or not the latitude / longitude data is a code indicating "no GPS information".
  • the code representing "no GPS information” the basic mask image pre-registered for each camera is set to be applied in the intruder detection process at the current timing (step S37).
  • the latitude / longitude data of the GPS terminal 14 is not a code indicating "no GPS information"
  • the latitude / longitude of the GPS terminal 14 is converted into XY coordinates (step S32).
  • a method of converting latitude / longitude into XY coordinates for example, a method of converting general latitude / longitude into XY coordinates of world coordinates can be used.
  • step S33 whether or not the XY coordinates obtained by the coordinate conversion are within the shooting range of the target camera, and whether or not there is a mask position notification regarding another camera adjacent to the target camera (hereinafter, adjacent camera). Determination (step S33).
  • the mask position notification is a notification issued when a worker is detected within the shooting range of the adjacent camera.
  • the XY coordinates are not within the shooting range of the target camera and there is no mask position notification for the adjacent camera (that is, if the worker is not within the shooting range of the target camera and is not near it)
  • the pre-registered basic mask image is set to be applied in the intruder detection process at the present timing (step S37).
  • the XY coordinates are within the shooting range of the target camera (that is, when the worker is within the shooting range of the target camera), or when there is a mask position notification regarding the adjacent camera (that is, the worker is within the shooting range of the target camera). If it is out of the shooting range but close to it), create a mask image according to the XY coordinates as follows.
  • the work range for a certain period of time is estimated based on the size of the carry-on equipment, and the mask radius [work radius] is determined (step S34). For example, when there is no equipment to bring in (that is, when maintenance work is performed only by workers), the range in which a person can run and move within a predetermined number of seconds is determined as the mask radius [work radius]. For example, when bringing in a long object, the range in which the long object can be moved within a predetermined number of seconds is determined as the mask radius [working radius].
  • the mask radius [viewing radius] is determined based on the illuminance data corresponding to the shooting range of the target camera and the posture of the worker in the shooting range of the target camera (step S35). Since the visual field range that can be seen by the worker depends on the brightness of the surroundings, the mask radius [visual radius] is adjusted to be smaller as the illuminance is lower (that is, the darker it is), and the higher the illuminance (that is, the brighter). Adjust so that the mask radius [visual illuminance] becomes larger.
  • the downward duration of the worker is longer than a predetermined value, that is, when the worker is working downward, the worker does not move and cannot reach far, so that the mask radius [working radius] ] Is set to 0, and the mask radius [visual radius] is also adjusted to be small.
  • a mask image used in the intruder detection process at the current timing is generated based on the basic mask image of the target camera (step S36). Specifically, a circular mask area is added to the basic mask image, centered on the XY coordinates of the worker, with the larger of the mask radius [working radius] and the mask radius [viewing radius] as the radius. Further, when the mask position notification is issued, a mask area (see image 58 in FIG. 5) corresponding to the notification content is also added. When GPS information of a plurality of workers is received, the above-mentioned circular mask area is calculated for each worker, and the area in which they are overlapped is used as the final circular mask area.
  • Step S38 it is determined whether or not the circular mask area added to the basic mask image extends outside the image, and if it does, it is determined whether there is an adjacent camera that includes the area corresponding to the protruding portion in the shooting range.
  • a mask position notification including the worker's XY coordinates, mask radius [working radius], and mask radius [visible radius] is issued (step S39). ..
  • a mask area corresponding to the protruding portion is added to the mask image of the adjacent camera.
  • the white background portion is the non-masked region and the black portion is the masked region.
  • the pre-registered basic mask image 52 is applied as it is.
  • the mask image 54 is created by adding the circular mask area centered on the position of the worker to the basic mask image 52.
  • the mask image 56 having a partially protruding circular mask region is created. In this case, even if the image 57 not including the worker is taken by the adjacent camera, the mask image 58 is created by adding the area corresponding to the protruding portion from the mask image 56 as the mask area.
  • the camera 11 that captures the surveillance area, the image processing device 12 that performs the detection processing of the intruder using the captured image of the camera 11, and the predetermined work are performed in the monitoring area.
  • the image processing device 12 includes a GPS terminal 14 carried by a worker, and the image processing device 12 targets an intruder detection process in a region including coordinates corresponding to a position positioned by the GPS terminal 14 in an image captured by the camera 11. It is configured to be set in the mask area to be outside. In this way, the GPS terminal 14 carried by the worker sequentially recognizes the position of the worker and automatically sets the surrounding area in the mask area, thereby preventing false detection of the worker and preventing intruders. It is possible to reduce oversight.
  • the mask radius [working radius] and the mask radius [visual radius] set for the worker centering on the coordinates corresponding to the position positioned by the GPS terminal 14 as the mask area. ] Is configured to set the circular mask area to which the larger one is applied. Therefore, it is possible to easily set the mask area in consideration of the work range and the visible range of the worker. For simplification of processing, a mask area may be set in consideration of only one of the mask radius [working radius] and the mask radius [visual radius].
  • the mask radius [visual radius] is adjusted according to the illuminance of the shooting range of the target camera, and the mask radius [working radius] is adjusted according to the posture of the worker. And the mask radius [viewing radius] is configured to be adjusted. In addition, the mask radius [working radius] is adjusted according to the equipment brought in by the worker. In this way, by adjusting the mask radius [work radius] and mask radius [visual radius] according to factors such as the work environment and work content, it is possible to set the mask area according to the actual work situation. It will be possible.
  • the area corresponding to the above-mentioned protruding area is set as the mask area for the image captured by the camera adjacent to the target camera. It is configured to do. Therefore, when the worker is out of the shooting range of the target camera but is near, it is possible to prevent the worker from being erroneously detected as an intruder.
  • a circular mask area centered on the position of the worker is set as the mask area, but a mask area having another geometric shape such as an ellipse, a quadrangle, or a hexagon is used. It is also possible to set.
  • the target area / non-target area for intruder detection is determined based on the mask image, but the determination may be made on the world coordinates instead of the determination based on the mask image. good.
  • replace the position of the object with the world coordinate system convert the mask radius [working range] and mask radius [visual range] to the actual distance, and then check whether the position of the object is within the range outside the target of intrusion detection. You just have to decide whether or not.
  • the circular mask area is determined by using the viewing radius or the working radius based on the GPS position information of the worker, but the mask area is not limited to a circular shape but is a rectangular shape. It may be present or it may be a polygon. In this case, a region having a predetermined shape based on at least one of the work range (distance) or the viewing range (distance) set for the worker, centered on the coordinates based on the position information of the worker, is set as the mask area. ..
  • the present invention also provides, for example, a method including a technical procedure relating to the above processing, a program for executing the above processing by a processor, a storage medium for storing such a program in a computer-readable manner, and the like. Is also possible.
  • the present invention can be used in a monitoring system that detects an intruder in a monitoring area.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Alarm Systems (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

L'invention concerne un système de surveillance grâce auquel il est possible de réduire le nombre de cas dans lesquels un objet intrus est manqué, tout en empêchant qu'un employé soit détecté par erreur. La présente invention comprend une caméra (11) destinée à capturer une image d'une zone de surveillance, un dispositif de traitement d'images (12) destiné à mettre en œuvre un processus destiné à capter un objet intrus en utilisant une image capturée par la caméra (11), et un terminal GPS (14) porté par un employé mettant en œuvre un travail prédéfini dans la zone de surveillance. Le dispositif de traitement d'images (12) définit, en tant que zone de masque non soumise au processus destiné à capter un objet intrus, une zone dans l'image capturée par la caméra (11) qui inclut des coordonnées correspondant à une position mesurée par le terminal GPS.
PCT/JP2021/032264 2020-09-15 2021-09-02 Système de surveillance et procédé de surveillance WO2022059500A1 (fr)

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JP2022550457A JP7354461B2 (ja) 2020-09-15 2021-09-02 監視システム及び監視方法

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JP2020154507 2020-09-15
JP2020-154507 2020-09-15

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08163652A (ja) * 1994-11-30 1996-06-21 Mitsubishi Electric Corp 侵入監視システム
JP2002334382A (ja) * 2001-05-08 2002-11-22 Hitachi Kiden Kogyo Ltd 入退場者の管理システム
JP2015179984A (ja) * 2014-03-19 2015-10-08 株式会社東芝 画像処理装置、その方法、及び、そのプログラム
WO2018198385A1 (fr) * 2017-04-28 2018-11-01 株式会社 テクノミライ Système, procédé et programme de sécurité de caisse enregistreuse numérique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08163652A (ja) * 1994-11-30 1996-06-21 Mitsubishi Electric Corp 侵入監視システム
JP2002334382A (ja) * 2001-05-08 2002-11-22 Hitachi Kiden Kogyo Ltd 入退場者の管理システム
JP2015179984A (ja) * 2014-03-19 2015-10-08 株式会社東芝 画像処理装置、その方法、及び、そのプログラム
WO2018198385A1 (fr) * 2017-04-28 2018-11-01 株式会社 テクノミライ Système, procédé et programme de sécurité de caisse enregistreuse numérique

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