JP6207656B1 - Video surveillance method, server, and video surveillance system - Google Patents

Abstract

A video monitoring method, a server, and a video monitoring system that reduce the burden of video monitoring on an administrator while reducing the communication capacity required for video monitoring. A camera 100 records a captured moving image, the camera 100 transmits a still image extracted from the moving image at a first time interval to a server 200, and the server 200 transmits the still image to an administrator terminal 300. The administrator terminal 300 receives an input for designating a still image, the server 200 transmits information for identifying the designated still image to the camera 100, and the camera 100 designates the designated still image. A moving image before a predetermined time than the image or a plurality of still images extracted from a moving image before the predetermined time at a second time interval shorter than the predetermined time is transmitted to the server 200. Alternatively, the plurality of still images extracted at the second time interval are transmitted to the administrator terminal 300. [Selection] Figure 1

Description

  The present invention relates to a video monitoring method, a server, and a video monitoring system.

  There is known a system for monitoring a parking lot by displaying an animation transmitted from a camera by an administrator terminal owned by an administrator who manages the parking lot.

  Japanese Patent Laid-Open No. 2006-115435 (Patent Document 1) states that “a monitoring camera installed for each of a plurality of monitoring points and a personal computer installed in the vicinity of the monitoring point or in a monitoring facility are connected by wire or wirelessly and remotely connected to the personal computer. A communication terminal device equipped with a display such as a local personal computer is connected to the Internet, and an image of the captured monitoring point and a push button image for selecting and controlling the monitoring camera are displayed on the display of the communication terminal device. The technology is described.

JP 2006-115435 A

  In the technique described in Patent Document 1, an image captured by a camera is transmitted to a communication terminal device via a personal computer. For this reason, the technique described in Patent Document 1 has a disadvantage that the communication capacity increases and the cost required for communication increases. In addition, there is a disadvantage that it takes a long time for the manager to be restrained in order to confirm the video displayed on the communication terminal device.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a video monitoring method, a server, and video monitoring that can reduce the burden of video monitoring for an administrator while reducing the communication capacity necessary for video monitoring. To provide a system.

  In the video monitoring method of the present invention, the camera records a captured video, the camera transmits a still image extracted from the video at a first time interval to the server, and the server transmits the still image to the administrator terminal. The administrator terminal receives an input for specifying a still image, the server transmits information for specifying the specified still image to the camera, and the specified still image recorded by the camera is recorded by the camera. Before the predetermined time, or a plurality of still images extracted from the moving image before the predetermined time at a second time interval shorter than the predetermined time, and the server transmits the moving image before the predetermined time or the second A plurality of still images extracted at the time intervals are transmitted to the administrator terminal.

  According to this configuration, it is possible to reduce the burden of video monitoring on the administrator while reducing the communication capacity necessary for video monitoring.

  Preferably, in the video monitoring method of the present invention, the still image transmitted from the server to the administrator terminal is a thumbnail image.

  According to this configuration, a list of still images can be displayed on the administrator terminal side, and the burden of video monitoring for the administrator can be further reduced.

  The server of the present invention receives a still image extracted at a first time interval from a moving image recorded by the camera, and transmits information for specifying the specified still image via the administrator terminal to the camera. The communication unit includes a camera that captures a plurality of still images extracted from a moving image before a predetermined time at a second time interval shorter than a predetermined time than a specified still image or a second time interval shorter than the predetermined time. The received moving image or a plurality of still images extracted at the second time interval are transmitted to the administrator terminal.

  The video surveillance system of the present invention is a video surveillance system having a camera and a server connected to the camera via a network. The camera records a captured video, and from the video at a first time interval. The server transmits the extracted still image to the server, and the server receives the still image extracted at a first time interval from the moving image recorded by the camera, and specifies the still image specified via the administrator terminal A communication unit for transmitting the information to the camera, and the communication unit is extracted from the moving image before the predetermined time than the designated still image or the moving image before the predetermined time at a second time interval shorter than the predetermined time. The plurality of still images are received from the camera, and the received moving image or the plurality of still images extracted at the second time interval are transmitted to the administrator terminal.

  In another video monitoring method of the present invention, a camera records a captured video, the camera transmits a still image extracted from the video at a first time interval to a server, and the server receives a still image received from the camera. To the administrator terminal, the administrator terminal accepts input for specifying a still image, the server transmits information for specifying the specified still image to the camera, and the camera is specified. The difference between a still image that is a predetermined time before the still image and the specified still image is detected, the camera searches for a video that is a predetermined time before the specified still image, and the still image that has the difference is detected. The moving image including the specified still image is transmitted to the server.

  According to this configuration, it is possible to further reduce the burden of video surveillance for the administrator.

  Preferably, in another video monitoring method of the present invention, the camera detects a difference for a predetermined region in a still image.

  According to this configuration, it is possible to suppress erroneous detection of an event when the vehicle is normally stopped at the parking lot.

  Preferably, in another video monitoring method of the present invention, the administrator terminal reproduces a moving image including a still image in which a difference is detected.

  According to this configuration, it is possible to suppress erroneous detection of events and further reduce the burden of video monitoring on the administrator.

  ADVANTAGE OF THE INVENTION According to this invention, the burden of the video monitoring of an administrator can be reduced, reducing the communication capacity required for video monitoring.

1 is a configuration diagram of a video surveillance system according to a first embodiment of the present invention. It is a figure which shows the outline | summary of the administrator screen displayed on the display of the administrator terminal which the video surveillance system which concerns on the 1st Embodiment of this invention has, Comprising: When the thumbnail image before an event generate | occur | produces is designated An example of It is a figure which shows the outline | summary of the administrator screen displayed on the display of the administrator terminal which the video surveillance system which concerns on the 1st Embodiment of this invention has, Comprising: When the thumbnail image after the occurrence of an event is designated An example of It is a figure which shows the outline | summary of the administrator screen displayed on the display of the administrator terminal 300 in the 1st Embodiment of this invention. It is a flowchart for demonstrating operation | movement of the video surveillance system which concerns on 1st Embodiment shown in FIG. It is a flowchart for demonstrating operation | movement of the video surveillance system which concerns on 1st Embodiment shown in FIG. 1, Comprising: It is a figure following FIG. 3A. It is a figure for demonstrating the modification of embodiment of this invention. It is a flowchart for demonstrating the operation | movement which concerns on the image | video monitoring system of 2nd Embodiment. FIG. 4B is a flowchart continued from FIG. 4A for explaining the operation according to the video monitoring system of the second embodiment.

<First Embodiment>
[overall structure]

  Hereinafter, a first embodiment of the present invention will be described. FIG. 1 is a diagram showing an example of a video monitoring system 10 according to the first embodiment of the present invention. A video monitoring system 10 illustrated in FIG. 1 includes a camera 100, a server 200 connected to the camera 100 via a network, and an administrator terminal 300 connected to the server 200 via a network.

  The camera 100 has a function of capturing a moving image. The camera 100 includes a processing unit 110, a memory 120, and a moving image recording unit 130.

  The processing unit 110 of the camera 100 stores the captured moving image in the memory 120. The processing unit 110 acquires a moving image stored in the memory 120, and extracts a still image from the acquired moving image at a first time interval (for example, 60 minutes). Then, the camera 100 transmits the still images extracted at the first time interval to the server 200. In this way, by transmitting a still image extracted from the captured moving image, the communication capacity can be reduced compared to transmitting all of the moving image. In particular, when the administrator terminal 300 is charged by the amount of packets, it is possible to prevent the communication fee from increasing.

  In addition, the processing unit 110 of the camera 100 is specified from still image specifying information (information for specifying a still image specified by the operation unit 320 of the administrator terminal 300) from the moving images stored so far in the memory 120. A moving image that is a predetermined time before the still image is extracted. For example, the processing unit 110 of the camera 100 determines a predetermined time before it is specified from still image specifying information (for example, an identifier for identifying a still image, a file name of the still image, a time when the still image was captured, etc.). The moving image from the still image to the still image specified from the still image specifying information is extracted from the stored moving images. Then, the processing unit 110 of the camera 100 extracts a still image from the extracted moving image at a second time interval (for example, 5 minutes) shorter than a predetermined time (the length of the extracted moving image).

  The camera 100 transmits, to the server, a plurality of still images extracted from a moving image before a predetermined time or a second time interval shorter than the predetermined time than a specified still image. As a result, it is possible to reduce the burden of video monitoring on the administrator while reducing the communication capacity necessary for video monitoring.

  The server 200 includes a communication unit 210, a thumbnail image generation unit 220, and a processing unit 230 that executes input / output of data necessary for controlling each unit of the server 200.

  The communication unit 210 of the server 200 receives still images, moving images, and various information transmitted from the camera 100 and the administrator terminal 300. In addition, the communication unit 210 transmits thumbnail images, moving images, and various types of information to the camera 100 and the administrator terminal 300. For example, the communication unit 210 transmits a moving image before a predetermined time or a plurality of still images extracted at the second time interval to the administrator terminal 300. In addition, the communication unit 210 receives still images extracted from the moving image recorded by the camera 100 at the first time interval, and receives information for specifying the still image specified via the administrator terminal 300. To 100. In addition, the communication unit 210 receives and receives a plurality of still images extracted from a moving image before a predetermined time at a second time interval shorter than the predetermined time than a specified still image or a second time interval shorter than the predetermined time. Or the plurality of still images extracted at the second time interval are transmitted to the administrator terminal 300.

  The thumbnail image generation unit 220 of the server 200 generates a thumbnail image based on the input still image. As a result, a list of still images can be displayed on the administrator terminal 300 side, and the burden of video surveillance on the administrator can be further reduced.

  An administrator terminal (for example, a smartphone, a mobile phone, a tablet terminal, etc.) 300 includes a communication unit 310, an operation unit 320, and a processing unit 330. The administrator terminal 300 displays a still image on the display. The administrator confirms the occurrence of an event (for example, garbage is thrown away) by monitoring still images displayed on the display.

  The operation unit 320 of the administrator terminal 300 receives an input for designating a still image.

  The communication unit 310 of the administrator terminal 300 receives a still image or a moving image transmitted from the server 200. In addition, the communication unit 310 transmits to the camera 100 still image specifying information that is information for specifying the still image specified by the operation unit 320.

The processing unit 330 of the administrator terminal 300 displays an administrator screen (described above, FIG. 2) including a thumbnail image transmitted from the server 200 on the display.
[Administrator screen]

  FIG. 2A is a diagram showing an overview of the administrator screen displayed on the display of the administrator terminal 300 according to the first embodiment of the present invention, where a thumbnail image 311 before an event occurs is designated. An example of

  FIG. 2B is a diagram showing an overview of the administrator screen displayed on the display of the administrator terminal 300 included in the video monitoring system according to the first embodiment of the present invention, and the thumbnail image 311 after the event has occurred. An example is shown when is specified.

  The display of the administrator terminal 300 functions as an operation unit 320 that displays a screen and receives a touch operation from a user via a touch panel. More specifically, the operation unit 320 detects a touch operation on the screen display area. And the operation part 320 performs the process corresponding to the position which received the touch operation.

  As shown in FIGS. 2A and 2B, a plurality of thumbnail images 311 are displayed in a list in the left-right direction on the display of the administrator terminal 300. Also, the time when each thumbnail image 311 was captured and the type of thumbnail image (may be the content of the event that occurred) are displayed in a list in the time display field 314.

  The operation unit 320 receives an input for designating one of the thumbnail images 311 from the thumbnail images 311 displayed in the list. The frame of the designated thumbnail image 311 is highlighted by the marker 312. In addition, an enlarged image of the designated thumbnail image 311 is displayed in the enlarged image display area 313.

  When the thumbnail image 311 after the dust 315 or the like is discarded is designated, an image including the discarded dust 315 is displayed in the enlarged image display area 313 as shown in FIG. 2B.

  When the determination button 316 is pressed in a state where a thumbnail image (for example, a thumbnail image immediately after an event) 311 is specified, the communication unit 310 of the administrator terminal 300 causes the specified thumbnail image (still image) to be displayed. Still image specifying information, which is information for specifying 311, is transmitted to the server 200. Note that the time may be input in an input field (not shown), and the input time may be transmitted to the server 200 as the still image specifying information.

  FIG. 2C is a diagram showing an overview of the administrator screen displayed on the display of the administrator terminal 300 according to the first embodiment of the present invention, and is a still image extracted at the second time interval (5 minutes). An example when is displayed in a list.

As shown in FIG. 2C, on the display of the administrator terminal 300, a plurality (13) of thumbnail images 311 extracted at intervals of 5 minutes within a predetermined time zone (17:00 to 18:00) It is displayed in a list in association with the time when images are taken in a grid.
[Overall processing]

  3A and 3B are diagrams showing an overview of the overall processing in the first embodiment of the present invention. FIG. 3B is a diagram following FIG. 3A.

  First, the camera 100 captures a moving image. Further, the processing unit 110 of the camera 100 records the captured moving image in the memory 120 (S301).

  Next, the processing unit 110 of the camera 100 extracts a still image from the moving image recorded in the memory 120 at a first time interval (for example, 1 hour) (S302).

  Next, the camera 100 transmits the extracted still image to the server 200 (S303).

  Next, the communication unit 210 of the server 200 receives the still image transmitted from the camera 100 (S304). In addition, the communication unit 210 inputs the received still image to the thumbnail image generation unit 220.

  Next, the thumbnail image generation unit 220 of the server 200 generates a thumbnail image based on the input still image (S305). The thumbnail image generation unit 220 inputs the generated thumbnail image to the communication unit 210.

  Next, the server 200 generates an administrator screen (described above, FIG. 2) including the thumbnail image generated in S305 (S306).

  Next, the communication unit 210 of the server 200 transmits the administrator screen (screen data for displaying the administrator screen) generated in S306 to the administrator terminal 300 (S307).

  Next, the processing unit 330 of the administrator terminal 300 displays an administrator screen including the thumbnail image (described above, FIG. 2) on the display (S308).

  Next, the operation unit 320 of the administrator terminal 300 receives an input for designating a still image (S309).

  Next, the communication unit 310 of the administrator terminal 300 transmits to the server 200 still image specifying information that is information for specifying the still image specified in S309 (S310).

  Next, the communication unit 210 of the server 200 receives the still image specifying information transmitted from the administrator terminal 300 (S311).

  Next, the communication unit 210 of the server 200 transmits still image specifying information to the camera 100 (S312).

  Next, the camera 100 receives still image specifying information (S313).

  Next, the processing unit 110 of the camera 100 extracts a moving image before a predetermined time from the still image specified from the still image specifying information from the moving images stored so far (S314).

  Next, the processing unit 110 of the camera 100 extracts a still image from the moving image extracted in S314 at a second time interval (for example, 5 minutes) (S315).

  Next, the camera 100 transmits the extracted still images to the server 200 (S316).

  Next, the communication unit 210 of the server 200 receives a plurality of still images transmitted from the camera 100 (S317). The communication unit 210 inputs the received still images to the thumbnail image generation unit 220.

  Next, the thumbnail image generation unit 220 of the server 200 generates a plurality of thumbnail images based on the input plurality of still images (S318). The thumbnail image generation unit 220 inputs the plurality of generated thumbnail images to the communication unit 210.

  Next, the communication unit 210 of the server 200 generates an administrator screen (described above, FIG. 2) including the thumbnail image generated in S318 (S319).

  Next, the server 200 transmits the administrator screen (screen data for displaying the administrator screen) generated in S319 to the administrator terminal 300 (S320).

  Next, the processing unit 330 of the administrator terminal 300 displays an administrator screen (described above, FIG. 2) including a plurality of thumbnail images on the display (S321).

  Next, the operation unit 320 of the administrator terminal 300 receives an input for designating a still image (S322).

  Next, the communication unit 310 of the administrator terminal 300 transmits still image specifying information, which is information for specifying the still image specified in S322, to the server 200 (S323).

  Next, the communication unit 210 of the server 200 receives the still image specifying information transmitted from the administrator terminal 300 (S324).

  Next, the communication unit 210 of the server 200 transmits the still image specifying information to the camera 100 (S325).

  Next, the camera 100 receives still image specifying information (S326).

  Next, the processing unit 110 of the camera 100 extracts, from the moving images stored so far, a moving image that is a predetermined time (for example, 5 minutes) before the still image specified from the still image specifying information (S327).

  Next, the processing unit 110 of the camera 100 transmits the moving image extracted in S327 to the server 200 (S328).

  Next, the communication unit 210 of the server 200 receives the moving image transmitted from the camera 100 (S329).

  Next, the server 200 reproduces the moving image (S330). For example, the server 200 performs streaming playback of a moving image.

  And the communication part 210 of the server 200 transmits the reproduction | regeneration moving image currently reproduced | regenerated in S330 to the administrator terminal 300 (S331).

  Next, the communication unit 310 of the administrator terminal 300 receives the playback moving image transmitted from the server 200 (S332).

  Next, the processing unit 330 of the administrator terminal 300 displays the received playback moving image via the display (S333).

  Note that the communication unit 310 of the server 200 may transmit a still image to the administrator terminal 300 in S306 and S319 without generating a thumbnail image in S305 and S318.

  In addition, the camera 100 may transmit the moving image of a predetermined time before the designated still image in S316 instead of transmitting the extracted still image to the server 200.

  Also, as shown in FIG. 3C, the camera 100 may play back a moving image in S327, the server 200 may transfer the played back video in S329, and the administrator terminal 300 may display the played back video in S332.

<Second Embodiment>

  The second embodiment is different from the first embodiment in that the first embodiment specifies a still image in which an event has occurred on the administrator terminal 300 side, whereas the second embodiment is different from the first embodiment. The camera 100 side specifies a still image in which an event has occurred. More specifically, the processing unit 110 of the camera 100 according to the second embodiment performs a still image that is a predetermined time before a specified still image (a still image specified by still image specifying information) and a specified still image. This is different from the first embodiment in that a difference from an image is detected. In addition, the processing unit 110 of the camera 100 according to the second embodiment searches for a moving image before a specified time from a specified still image, identifies a still image in which a difference has occurred, and selects a moving image including the identified still image. The point which transmits to the server 200 differs from 1st Embodiment. This further reduces the monitoring burden and communication capacity performed by the administrator. Note that the server 200 may identify a still image in which an event has occurred.

Hereinafter, differences of the second embodiment from the first embodiment will be described mainly with reference to FIGS. 4A and 4B.
[Overall processing]

  4A and 4B are diagrams showing an overview of the overall processing in the second embodiment of the present invention.

  First, the camera 100 captures a moving image. Further, the processing unit 110 of the camera 100 records the captured moving image in the memory 120 (S401).

  Next, the processing unit 110 of the camera 100 extracts a still image from the moving image recorded in the memory 120 at a first time interval (for example, 1 hour) (S402).

  Next, the camera 100 transmits the extracted still image to the server 200 (S403).

  Next, the communication unit 210 of the server 200 receives the still image transmitted from the camera 100 (S404). The communication unit 210 inputs the received still image to the thumbnail image generation unit 220.

  Next, the thumbnail image generation unit 220 of the server 200 generates a thumbnail image based on the input still image (S405). The thumbnail image generation unit 220 inputs the generated thumbnail image to the communication unit 210.

  Next, the server 200 generates an administrator screen including the thumbnail image generated in S405 (S406).

  Next, the communication unit 310 of the administrator terminal 300 transmits the administrator screen (image data for displaying the administrator screen) generated in S406 to the administrator terminal 300 (S407).

  Next, the processing unit 330 of the administrator terminal 300 displays the administrator screen (described above, FIG. 2) including the received thumbnail image on the display (S408).

  Next, the operation unit 320 of the administrator terminal 300 receives an input for designating a still image (S409).

  Next, the communication unit 310 of the administrator terminal 300 transmits still image specifying information, which is information for specifying the still image specified in S409, to the server 200 (S410).

  Next, the communication unit 210 of the server 200 receives the still image specifying information transmitted from the administrator terminal 300 (S411).

  Next, the communication unit 210 of the server 200 transmits the still image specifying information to the camera 100 (S412).

  Next, the camera 100 receives still image specifying information (S413).

  Next, the processing unit 110 of the camera 100 detects a difference between a still image that is a predetermined time before the still image specified from the still image specifying information and a still image specified from the still image specifying information (S414). .

  Next, the processing unit 110 of the camera 100 executes a moving image extraction process (described later, FIG. 4B) (S415). Accordingly, the processing unit 110 of the camera 100 identifies a still image in which a difference has occurred.

  Next, the camera 100 transmits a moving image including the still image specified in S415 to the server 200 (S416). If no difference is detected in S414, the camera 100 does not transmit the moving image to the server 200.

    Next, the communication unit 210 of the server 200 receives the moving image transmitted from the camera 100 (S417).

  Next, the server 200 reproduces the moving image (S418).

  And the communication part 210 of the server 200 transmits the reproduction | regeneration moving image currently reproduced | regenerated in S418 to the administrator terminal 300 (S419).

  Next, the communication unit 310 of the administrator terminal 300 receives the playback moving image transmitted from the server 200 (S420).

  Next, the processing unit 330 of the administrator terminal 300 displays the received playback moving image via the display (S421).

  In S414, the camera 100 may detect a difference for a predetermined area (for example, accepting an input for designating an area) in the still image. This can prevent erroneous detection as an event when the vehicle is normally stopped at the parking lot or when the vehicle moves within the parking lot. In addition, as an area | region which detects a difference, there exists an area | region in the parking lot where garbage was put in the past. In addition, as a region for detecting the difference, there is a region excluding a parking space and a region where the vehicle travels. In addition, areas for detecting differences include building entrances, disaster-prone areas, and garbage dumps.

In S421, administrator terminal 300 may display a playback moving image including a still image in which a difference is detected. As a result, it is possible to suppress erroneous detection of the event and reduce the burden of video surveillance on the administrator. That is, communication capacity and video monitoring burden can be further reduced by not performing communication or video playback except when an event occurs.
[Video extraction processing]

  FIG. 5 is a diagram showing an outline of the moving image extraction processing according to the second embodiment of the present invention.

  First, the camera 100 determines whether a difference is detected in S414 (S501).

  When determining that the difference is detected in S501, the camera 100 extracts a moving image (S502). Then, the camera 100 transmits the extracted moving image to the server 200 (S503).

  Next, the server 200 receives a moving image (S504).

  Next, the server 200 reproduces the moving image (S505).

  And the communication part 200 of the server 200 transmits the reproduction | regeneration moving image currently reproduced | regenerated in S505 to the administrator terminal 300 (S506).

  Next, the administrator terminal 300 receives the playback video (S507). Then, the administrator terminal 300 displays the received reproduction moving image via the display (S508).

  When determining that the difference is not detected in S501, the camera 100 determines whether to end the difference detection (S509). If the camera 100 determines to end the difference detection, an error is output (S510). On the other hand, when the camera 100 determines not to end the difference detection, the process returns to S414.

  The present invention is not limited to the embodiment described above.

  That is, those skilled in the art may make various modifications, combinations, subcombinations, and alternatives regarding the components of the above-described embodiments within the technical scope of the present invention or an equivalent scope thereof. For example, the above-described embodiments are not necessarily limited to those having all the configurations described. A part of the configuration of one embodiment can be replaced with the configuration of another embodiment. Further, the configuration of another embodiment can be added to the configuration of a certain embodiment.

  Further, the control lines and information lines indicate what is considered necessary for the explanation, and not all the control lines and information lines on the product are necessarily shown.

  The present invention is applicable to a system that displays and monitors a moving image or still image captured by the camera 100 on a display such as the administrator terminal 300.

DESCRIPTION OF SYMBOLS 10 ... Video surveillance system 100 ... Camera 110 ... Processing part 120 ... Memory 200 ... Server 210 ... Communication part 220 ... Thumbnail image generation part 230 ... Processing part 300 ... Administrator terminal 310 ... Communication part 320 ... Operation part 330 ... Processing part

Claims (7)

The camera records the captured video,
The camera sends a still image extracted from the video at a first time interval to a server;
The server sends the still image to an administrator terminal,
The administrator terminal accepts an input for designating the still image;
The server transmits information for specifying the designated still image to the camera,
A plurality of videos extracted by the camera before the predetermined time at a second time interval shorter than the predetermined time than the specified still image recorded by the camera or at a second time interval shorter than the predetermined time; Sending the still image to the server;
The server transmits the moving image before the predetermined time or the plurality of still images extracted at the second time interval to the administrator terminal.
Video surveillance method.     The video monitoring method according to claim 1, wherein the still image transmitted from the server to the administrator terminal is a thumbnail image. A communication unit that receives still images extracted at a first time interval from a moving image recorded by the camera, and transmits information for specifying the still image specified through the administrator terminal to the camera; And
The communication unit includes a plurality of the still images extracted from the moving image before the predetermined time at the second time interval shorter than the predetermined time than the specified still image or at the second time interval shorter than the predetermined time. And transmitting the received moving image or the plurality of still images extracted at the second time interval to the administrator terminal.
server. A video surveillance system comprising a camera and a server connected to the camera via a network,
The camera
Record the captured video,
Sending a still image extracted from the video at a first time interval to a server;
The server
A communication unit that receives still images extracted at a first time interval from the moving image recorded by the camera and transmits information for specifying the still image specified via an administrator terminal to the camera; And the communication unit includes a plurality of moving images extracted from the moving image before the predetermined time at the second time interval shorter than the moving image before the predetermined time than the specified still image or the predetermined time. Receiving the still image from the camera, and transmitting the received moving image or the plurality of still images extracted at the second time interval to the administrator terminal;
Video surveillance system. The camera records the captured video,
The camera sends a still image extracted from the video at a first time interval to a server;
The server transmits the still image received from the camera to an administrator terminal,
The administrator terminal accepts an input for designating the still image;
The server transmits information for specifying the designated still image to the camera,
The camera detects a difference between the still image that is a predetermined time before the designated still image and the designated still image;
The camera searches for the moving image before the predetermined time from the designated still image, identifies the still image in which the difference has occurred, and transmits the moving image including the identified still image to the server. ,
Video surveillance method.   The video monitoring method according to claim 5, wherein the camera detects the difference for a predetermined region in the still image. The video monitoring method according to claim 6, wherein the administrator terminal reproduces the moving image including the still image in which the difference is detected.

Images