JP5041743B2 - Video surveillance system and video surveillance system control method - Google Patents

Description

  The present invention relates to a video monitoring system and a video monitoring system control method for monitoring or storing video encoded at a remote place by encoding video input from a plurality of cameras and then transmitting the video through a network.

  FIG. 17 is a block diagram showing a schematic configuration of a conventional video surveillance system. In the figure, the conventional video monitoring system can effectively use the transmission capacity within a range in which congestion does not occur in the network 1404 and can receive a video signal with a high frame rate at the video monitoring terminal 1402 as necessary. A plurality of surveillance camera terminals 1401, a plurality of video surveillance terminals 1402, a central monitoring control device 1403, and a network 1404 are configured. The monitoring camera terminal 1401 includes a monitoring camera 1401a that captures a video and an image input device 1401b that encodes the video and transmits the encoded video to the network 1404. The video monitoring terminal 1402 sets an image output device 1402a that receives and decodes video from the network 1404, a monitor 1402c that displays the decoded video, and a frame rate that defines the number of transmission frames per second. Is composed of a central monitoring control device 1403 and a control panel 1402b for transmitting the information to the monitoring camera terminal.

  The central supervisory control device 1403 receives the image output device 1403a that receives and decodes the video signal from the monitoring camera terminal 1401, the monitor 1403c that displays the decoded video, and the setting information from the video monitoring terminal 1402, A monitoring control device 1403j that stores the connection destination and the frame rate of which video monitoring terminal 1402 is monitoring the video from which monitoring camera terminal 1401, and monitors the communication status of the video signal, and the central monitoring control device The control panel 1403b sets the connection destination and the frame rate of which video monitor terminal 1402 monitors the video from which surveillance camera terminal 1401 in 1403. When there is a request for setting a new monitor condition (connection destination or frame rate) from the video monitoring terminal 1402, the monitoring control device 1403j determines whether or not the setting is possible, and sends the setting information to the video monitoring terminal 1402 and the monitoring camera terminal 1401. By communicating, the transmission capacity of the network 1401 is managed (see, for example, Patent Document 1).

  FIG. 18 is a block diagram illustrating a schematic configuration of the surveillance camera terminal 1401. In the figure, a monitoring camera terminal 1401 designates a monitoring camera 1501 that captures a monitoring video, an encoder 1502 that encodes a video signal, a transmission unit 1503 that transmits to a network, and the importance of monitoring for each monitoring area. An area dividing unit 1510 is configured to enable encoding and transmission in accordance with the importance of the area in the surveillance video. The area dividing unit 1510 includes a display unit 1507 that displays a moving image to be transmitted, an input unit 1506 that includes a pointing device such as a mouse and specifies an area and an importance level in the image, and the input area information and importance level information. The storage unit 1505 that holds the information and the composition unit 1504 that superimposes and displays the region information and the importance on the image as a difference in image brightness. The encoder 1502 stores the region information stored in the storage unit 1505. And the importance level information, each region is encoded with a different compression rate (see, for example, Patent Document 2).

JP 2003-289528 A JP 2000-333156 A

  However, the conventional video surveillance system has the following problems. That is, the video monitoring system disclosed in Patent Document 1 is managed centrally by the central monitoring control device 1403 and monitoring conditions (connection destination, frame rate, etc.) of the monitoring camera terminal 1401 and the video monitoring terminal 1402 are collectively managed. When a large-scale video monitoring system in which the number of monitoring camera terminals 1401 or video monitoring terminals 1402 becomes very large, the monitoring condition for increasing the load on the central monitoring control device 1403 or transmitting it to the central monitoring control device 1403 As a result, the load on the network connected to the central monitoring control device 1403 increases, and the monitoring conditions cannot be changed quickly.

  In addition, since the surveillance camera terminal disclosed in Patent Document 2 can set only the importance level in the video captured by the surveillance camera, a specific space is monitored from different directions by a plurality of surveillance cameras. In the case of a simple monitoring system (for example, when the state of the monitoring object changes when the monitoring object is photographed from different angles by a plurality of monitoring cameras), the importance of the monitoring object changes for each monitoring camera However, it is impossible to efficiently encode the entire monitoring target space photographed by the monitoring camera.

  The present invention has been made in view of such circumstances, and even if a large-scale system in which the number of surveillance camera terminals or video surveillance terminals is very large is constructed, the load on the central supervisory control device increases. The monitoring conditions can be controlled without increasing the network, and the entire monitoring target space can be efficiently encoded even when a specific space is monitored from different directions by a plurality of monitoring cameras. An object of the present invention is to provide a video surveillance system and a video surveillance system control method that can be used.

The object is achieved by the following configuration or method.
The video monitoring system according to the present invention includes a plurality of the monitoring sites including a plurality of monitoring cameras and one site control device, and the plurality of monitoring cameras and the site control devices of each of the plurality of monitoring sites are connected to a network. A central monitoring device connected via a video input means for inputting video from an imaging device, encoding means for encoding video input by the video input means, and the encoding Transmitting / receiving means for transmitting video data encoded by the means to the network, object detection means for detecting a specific object by image recognition from the video input by the video input means, and A code for setting an encoding condition in the encoding unit by receiving detection information and the code amount control information received by the transmission / reception unit via the network. A volume control unit, and the site control device includes a site information management unit that manages encoded information of each of the plurality of monitoring cameras in the same site, and an encoding information held in the site information management unit. Site control means for controlling the code amount of the surveillance camera in the same site, and transmission / reception means for transmitting code amount control information determined by the site control means to the network, wherein the central monitoring device encodes Video storage means for storing the recorded video data, overall information management means for storing the encoded information of all of the plurality of monitoring sites, and the code of the monitoring site by the encoded information held in the overall information management means A central control means for controlling the amount; and a transmission / reception means for transmitting the code amount control information determined by the central control means to the network. .

  With this configuration, it is possible to quickly change the encoding condition of the video accumulated in the central monitoring device using the detection result of the target from the video, and the entire monitoring target space captured by the monitoring camera can be efficiently used. It can be encoded well.

  In the video monitoring system of the present invention, the monitoring camera includes an installation position information management unit that holds camera installation position information, and the code amount control unit is installed in the camera position information management unit. Based on the position information, a code amount is preferentially assigned to the monitoring cameras in the vicinity.

  With this configuration, the monitoring camera is provided with installation position information management means so that the positional relationship with other monitoring cameras can be grasped. Therefore, the monitoring cameras can be set based on the distance between the monitoring cameras without using the site control device. The code amount allocated to the monitoring camera can be corrected, and the entire monitoring target space captured by the monitoring camera can be encoded more efficiently.

In the video monitoring system of the present invention, the monitoring camera includes object state management means for holding state information of the object detected by the object detection means, and the code amount control means includes the object state. Based on the state information of the object held in the management means, a code amount is preferentially assigned to the other surveillance cameras having a high object existence probability.

  With this configuration, the monitoring camera is provided with the object state management unit that holds the state of the object detected by the object detection unit, and the other existence of the object is high based on the state information of the object. Since the code amount is preferentially allocated, the entire monitoring target space photographed by the monitoring camera can be encoded more efficiently.

In the video monitoring system of the present invention, the site control device includes site information weight calculating means for calculating a weight of code amount allocation between the monitoring sites, and the site information weight calculating means is provided in the monitoring site. Based on the number of detection results of the object detection means of each of the monitoring cameras, a code amount assignment weight at the monitoring site for preferentially assigning a code amount to the monitoring site with a large number of detection results is calculated.

  With this configuration, since the site information weight calculation means is provided, the code amount allocated to each monitoring site can be corrected without going through the central monitoring device, and the encoding conditions of each monitoring camera can be changed quickly. .

  In the video monitoring system of the present invention, the site control device includes video storage means for storing encoded video data transmitted from each of the monitoring cameras to the network, and the video storage means Only the detected video data from the surveillance camera is accumulated.

  With this configuration, since the video storage means is provided in the site control device, when displaying the stored video data on, for example, a monitoring terminal (monitoring terminal), each load is not concentrated on the central monitoring device. The load can be distributed to the site controller.

  The video monitoring system of the present invention includes a plurality of monitoring sites each including a plurality of monitoring cameras and one site control device, and further includes a central monitoring device connected to each of the monitoring sites via a network. Includes first video input means for inputting and outputting the video from the imaging device, and the site control device includes second video input means for inputting the video output from the surveillance camera, Encoding means for encoding the video input by the second video input means, transmission / reception means for transmitting the video data encoded by the encoding means and code amount control information to the network, and the second Object detection means for detecting a specific object by image recognition from the video input by the video input means, detection information of the object detection means, and the network Code amount control means for setting an encoding condition in the encoding means with the code amount control information received by the transmission / reception means as input, site information management means for managing encoding information, and held in the site information management means Site control means for controlling the code amount of the surveillance camera in the same site according to the encoded information, the central monitoring device comprises video storage means for storing the encoded video data, and a plurality of the monitoring Obtained by the overall information management means for holding the encoded information of all the sites, the central control means for controlling the code amount of the monitoring site by the encoded information held in the overall information management means, and the central control means Transmitting / receiving means for transmitting the code amount control information to the network.

  With this configuration, by providing the encoding means and the object detection means in the site control apparatus, and switching the use of the encoding means and the object detection means in the site control apparatus for each surveillance camera in a time-sharing manner, The surveillance camera encoding means, object detection means and the like are not required, and the cost of the surveillance camera can be reduced.

  In the video monitoring system of the present invention, the site control device includes site information weight calculation means for calculating a weight of code amount allocation between the monitoring sites, and the site information weight calculation means includes the object detection Based on the number of detection results of the means, a code amount allocation weight at the monitoring site for preferentially allocating the code amount to the monitoring site with a large number of detection results is calculated.

  With this configuration, since the site information weight calculation means is provided, the code amount allocated to each monitoring site can be corrected without going through the central monitoring device, and the encoding conditions of each monitoring camera can be changed quickly. .

  In the video monitoring system of the present invention, the site control device includes video storage means for storing encoded video data transmitted from the monitoring cameras to the network, and the video storage means includes a target object. Only the video data from the surveillance camera that has detected is stored.

  With this configuration, since the video storage means is provided in the site control device, when displaying the stored video data on, for example, a monitoring terminal (monitoring terminal), each load is not concentrated on the central monitoring device. The load can be distributed to the site controller.

  The video surveillance system control method according to the present invention includes a plurality of surveillance sites composed of a plurality of surveillance cameras and one site control device, and the plurality of surveillance cameras and the site control devices of each of the plurality of surveillance sites are networked. A video surveillance system control method of a video surveillance system comprising a central monitoring device connected via a network, wherein the surveillance camera encodes a video obtained by imaging and transmits video data to the network; A specific object is detected by image recognition from the image obtained by imaging, and the encoding condition in the encoding process is set by using the obtained detection information and the code amount control information received via the network as input, The site control device uses the encoded information of each of the plurality of surveillance cameras in the same site to monitor the surveillance cameras in the same site. The code amount is determined, and the code amount control information obtained thereby is transmitted to the network. The central monitoring device accumulates the encoded video data from the monitoring camera, and all the plurality of the monitoring sites. Is encoded, the code amount of the monitoring site is determined based on the encoded information, and the code amount control information obtained thereby is transmitted to the network.

  By this method, it is possible to quickly change the encoding condition of the video stored in the central monitoring device using the detection result of the target object from the video, and the entire monitoring target space captured by the monitoring camera can be efficiently used. It can be encoded well.

  According to the present invention, it is possible to quickly change the encoding condition of the video accumulated in the central monitoring apparatus using the detection result of the object from the video, and the entire monitoring target space photographed by the monitoring camera Can be efficiently encoded.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a block diagram showing a schematic configuration of a video surveillance system according to Embodiment 1 of the present invention. In the figure, the video monitoring system of the present embodiment includes a plurality of monitoring sites 101, one central monitoring apparatus 102, a plurality of monitoring terminals 103, and a network 121.

  The monitoring site 101 includes a plurality of monitoring cameras 104 and one site control device 105. The monitoring camera 104 inputs video from an image sensor such as a CCD (Charge Coupled Device) or CMOS (Complementary Metal Oxide Semiconductor) (not shown), encodes it, and transmits it to the network 121. A video input unit 106 that inputs video, an encoding unit 107 that encodes video input by the video input unit 106 by an encoding method such as MPEG (Moving Pictur Experts Group), and video input by the video input unit 106 The amount of code is determined based on the object detection unit 110 that detects the object by image recognition and the encoded information from the site control device 105 of the monitoring site 101 at the same site as the object detection result from the object detection unit 110. The code amount control unit 109 that holds the information and sets the encoding unit 107, and the encoded video data and encoding information are Transmitted to over click 121, also includes a transceiver unit 108 for receiving encoded information transmitted from the site control apparatus 105 of the monitoring site 101 of the same site. An example of detection of an object by image recognition is disclosed in Japanese Patent Application Laid-Open No. 2001-222719. An example of controlling the encoding unit 107 based on an object is disclosed in Japanese Patent Laid-Open No. 2005-109606.

  The site control device 105 manages the encoded information of the video data transmitted from the monitoring camera 104 at the same site or the encoded information (site encoded information) transmitted from the central monitoring device 102. The site information management unit 112 that stores the encoded information transmitted from the monitoring camera 104 or the encoded information (site encoded information) transmitted from the central monitoring apparatus 102, and the encoding stored in the site information management unit 112 The site control unit 111 that determines the encoding information for each monitoring camera 104 on the same site based on the information, and the encoding information determined by the site control unit 111 is transmitted to the monitoring camera 104 on the same site and to the central monitoring device 102 And the encoded information transmitted from the surveillance camera 104 at the same site is received and the central Coded information transmitted from the device 102 and a transceiver 113 for receiving the (site encoded information).

  The central monitoring apparatus 102 receives and accumulates video data transmitted from the monitoring camera 104 at each monitoring site 101, and manages encoded information transmitted from the site control apparatus 105 at each monitoring site 101. A video storage unit 115 that stores video data transmitted from the monitoring camera 104 of each monitoring site 101, an overall information management unit 117 that stores encoded information transmitted from the site control device 105 of each monitoring site 101, and A central control unit 116 that determines the encoding information for each monitoring site 101 based on the encoding information held in the overall information management unit 117, and the encoding information (site encoding information) determined by the central control unit 116 It is transmitted to the site control device 105 of each monitoring site 101 and transmitted from the site control device 105 of each monitoring site 101. And and a transceiver unit 114 for receiving encoded information (site encoded information).

  The monitoring terminal 103 receives video data from the monitoring camera 104 at each monitoring site 101 or video data stored in the central monitoring device 102, decodes it, and displays it on a monitor (not shown). A reception unit 118 that receives the video data transmitted from the monitoring camera 104 of each monitoring site 101 and receives the video data transmitted from the video storage unit 115 (that is, the video data stored in the video storage unit 115); A decoding unit 119 that decodes the video data received at 118; and a video display unit 120 that displays the video data decoded by the decoding unit 119 on a monitor.

  The network 121 is a communication network that connects the monitoring site 101, the central monitoring device 102, and the monitoring terminal 103 to each other.

  Next, the operation of the video monitoring system having the above configuration will be described with reference to FIGS. FIG. 2 is a flowchart showing the operations of the code amount control unit 109 of the monitoring camera 104, the site control unit 111 of the site control device 105, and the central control unit 116 of the central monitoring device 102. FIG. It is a table which shows.

  In FIG. 2, the code amount control unit 109 of the monitoring camera 104 performs an object based on encoding information (details will be described later) when an object detection result is input from the object detection unit 110 (YES in step S201). The coding characteristic (quantization step or the like) of the area where the object is detected is calculated as code amount control information (step S202), and is set in the coding unit 107 (step S203). After the code amount control information is set in the encoding unit 107, the encoding information (data corresponding to the table 302 and the table 303 in FIG. 3) is updated from the encoding result of the encoding unit 107, and is updated at a constant cycle (for example, It transmits to the site control apparatus 105 (every hour) (step S204). On the other hand, if no object detection result is input from the object detection unit 110 (NO in step S201), it is determined whether encoded information is input (step S205). In this determination, if encoded information is input (YES in step S205), the encoded information is updated (step S206). In this case, the encoding information input to the code amount control unit 109 is transmitted from the site control apparatus 105.

  FIG. 3 is a diagram illustrating an example of the encoded information held in the code amount control unit 109. Encoding information is managed by three tables 301-303. That is, a camera target code amount (for example, a code amount per second) item indicating a code amount that can be assigned by the monitoring camera 104 set in the site control device 112, and a date / time item indicating an effective time of the camera target code amount A table 301 composed of a table 301 composed of a camera code amount item indicating an actually allocated code amount, a date / time item indicating a measured period of the camera code amount, and an object detected by the monitoring camera 104 An object ID item indicating an ID for distinguishing an object, a size item indicating the size of the object in the video, a code weight item assigned to a detected area of the object, and an object detected It is managed by a table 303 composed of date and time items indicating the selected period.

  In step S202 in FIG. 2, the code amount weight is calculated in consideration of the size of the detected object so as not to exceed the camera target code amount. For example, it calculates | requires in the following procedures.

(1) Average code amount per block = camera target code amount / total number of blocks (2) Average code amount in object detection block = average code amount per block × α
(Α is a value empirically obtained, such as 1.2)
(3) Average code amount other than object detection block = (camera target code amount−average code amount in object detection block × number of object detection blocks) / (total number of blocks−number of object detection blocks)
Here, the block is preferably a macroblock used in MPEG (Moving Picture Experts Group) or the like.

  In FIG. 2, the site control unit 111 of the site control apparatus 105 updates the site encoding information (step S209) when the encoded information is input (YES in step S207), and the updated site code Information (data corresponding to the tables 305 and 306 in FIG. 4) is transmitted to the central monitoring apparatus 102 (step S210). The encoded information input to the site control unit 111 is transmitted from the monitoring camera 104. On the other hand, if encoded information is not input (NO in step S207), it is determined whether site encoded information is input (step S208). When site coding information is input (in the case of YES in step S208), the current site coding information is updated based on the input site coding information, and further coding information is determined (step S211). The encoded information (data corresponding to the table 301) is transmitted to the monitoring camera 104 (step S212). The site encoding information input to the site control unit 111 is transmitted from the central monitoring apparatus 102.

  Here, FIG. 4 is a diagram illustrating an example of the site encoded information held in the site information management unit 112. Site coding information is managed by three tables 304-306. That is, a table 304 composed of a site target code amount item indicating the code amount that can be assigned to the monitoring site 101 set by the central monitoring apparatus 102 and a date / time item indicating the validity period of the site target code amount, Table 305 composed of a site code amount item indicating the assigned code amount, a date / time item indicating a measured period of the site code amount, a camera ID item for distinguishing the monitoring camera 104, and the number of detected objects The table is managed by a table 306 including items, code amount weight items assigned to blocks in which objects are detected, all assigned code amount items, and date / time items indicating periods. The update of the site encoding information in step 211 is obtained by the following procedure, for example.

(1) Refer to the date and time items in the table 306, and add the total code amount and the number of objects for each time zone (for example, in units of one hour) (the total code amount of all the monitoring cameras 104 in the site and the detected object) Find the total number of objects).
(2) Camera weight coefficient = total number of objects of surveillance camera / total number of objects of surveillance camera (3) Camera target code amount of each surveillance camera = (total code amount of surveillance camera / total of all code amounts + surveillance camera (Weighting factor) / 2 × site target code amount The code amount weight may be added to the above formula.

  Returning to FIG. 2, when video data is input (YES in step S213), the central control unit 116 of the central monitoring apparatus 102 sends the video data to the video storage unit 115 and stores it in a storage device such as a hard disk drive. (Step S214). The video data input to the central control unit 116 is transmitted from the monitoring camera 104. On the other hand, if video data is not input (NO in step S213), it is determined whether site coding information has been input (step S215). When site coding information is input (YES in step S215), the entire coding information is updated (step S216), and then the site coding information (data corresponding to table 304) is sent to site control apparatus 105. Transmit (step S217). The site encoding information input to the central control unit 116 is transmitted from the site control device 105.

  Here, FIG. 5 is a diagram illustrating an example of the overall encoded information held in the overall information management unit 117. The overall encoded information is managed by a table 307 including site ID items indicating a ratio of code amount allocation to each monitoring site 101 and period items indicating a period during which the allocation ratio is valid. In step S216, for example, the entire encoded information is obtained by the following procedure.

(1) The site code amount of each monitoring site 101 is referred to from the received site encoding information, and the sum of the site code amounts is obtained.
(2) Code amount allocation ratio to each monitoring site 101 = Site code amount of each monitoring site 101 / Sum code amount sum

  In FIG. 2, in step S217, the site target code amount of the site encoded information is obtained by multiplying the system usable code amount by the allocation ratio to the monitoring site 101.

  As described above, according to the video monitoring system of the present embodiment, the code amount control unit 109 that manages the encoded information generated by the monitoring camera 104 and the site information management unit 112 that manages the encoded information of the monitoring site 101. And the overall information management unit 117 that manages the encoding information of the entire system, so that the encoding condition of the video monitored by the monitoring terminal 103 or the video stored in the video storage unit 115 in the central monitoring device 102 is It is possible to change quickly while using the detection result of the object from the video. Furthermore, the entire monitoring target space photographed by the monitoring camera 104 can be efficiently encoded.

  In the present embodiment, 1 / 1-1 / 10, 2005/1/19: 00-10: 00, etc. are used as examples of date / time items. It is also possible to manage every day (days with holidays and events).

(Embodiment 2)
FIG. 6 is a block diagram showing a schematic configuration of a video surveillance system according to Embodiment 2 of the present invention. In the figure, the same parts as those in FIG. The difference from the first embodiment of FIG. 1 is that a setting position information management unit 401 that holds setting position information (details will be described later) of the monitoring camera 104 is newly provided.

  The operation of the video surveillance system configured as described above will be described with reference to FIGS. First, a difference in operation of the code amount control unit 109 due to the provision of the setting position information management unit 401 will be described with reference to FIG. The code amount control unit 109 is different in that the encoded information is transmitted directly to the monitoring camera 104 in addition to the site control apparatus 105. Specifically, the encoded amount control unit 109 calculates and transmits the encoded information to be transmitted in step S501. The monitoring camera 104 is determined. Other steps are the same as those described in FIG.

  FIG. 8 is a diagram illustrating an example of set position information managed by the set position information management unit 401. The setting position information 601 includes a camera ID item (CamID1 and the like) for identifying the monitoring camera 104, and an installation position item ((X1, Y1, Z1 and the like) indicating the setting position of the monitoring camera 104 in a three-dimensional world coordinate system or the like. , And a distance item indicating a distance from the monitoring camera 104 to another monitoring camera 104 (L1 obtained from the installation position). In step S501, using the installation position information of the monitoring camera 104 obtained from the installation position information management unit 401, for example, the monitoring camera 104 that transmits encoded information and the encoded information to be transmitted (target camera code amount) in the following procedure. (Correction amount) is determined.

(1) The number of objects detected as objects is obtained from the code amount control information table 303.
(2) The distances to all the monitoring cameras 104 are obtained from the table 601.
(3) The correction amount of the target camera code amount is obtained under the following conditions.
(A) Distance to surveillance camera 104 ≦ X0
Target camera code amount correction amount = 0
(B) X0 <distance to surveillance camera 104 <X1
Correction amount of target camera code amount = α × distance to monitoring camera 104 + β
α is a negative number, and is obtained from the number of objects obtained in (1). The larger the number of objects, the larger the value. β is a correction term and is a value to be corrected in accordance with the environment where the monitoring camera 104 is installed.
(C) X1 ≦ distance to the monitoring camera 104
Target camera code amount correction amount = 0

  The correction amount of the target camera code amount indicates a ratio (for example, + 10%) for correcting the target camera code amount set in each monitoring camera 104, and may take a negative value as well as a positive value. X0 and X1 are threshold values, and are determined experimentally according to the setting environment of the monitoring camera 104.

  (4) The monitoring camera 104 whose correction amount of the target camera code amount obtained in (3) is other than 0 is determined as the monitoring camera that transmits the encoded information.

  As described above, according to the video monitoring system of the present embodiment, since the installation position information management unit 401 is provided in addition to the configuration similar to that of the first embodiment, the monitoring cameras 104 can be connected without using the site control device 105. By correcting the code amount assigned to the other monitoring cameras 104 based on the distance, the encoding condition of each monitoring camera 104 can be quickly changed.

  In this embodiment, a three-dimensional world coordinate system is used. However, it is also possible to express a distance by projecting to a two-dimensional map. It is also possible to express distance as coordinates.

  In the present embodiment, the correction amount of the target camera code amount is calculated using the number of objects, but the size of the object and the code amount assigned to the detected area of the object are calculated. Etc. can also be used.

(Embodiment 3)
FIG. 9 is a block diagram showing a schematic configuration of a video surveillance system according to Embodiment 3 of the present invention. In the figure, the same parts as those in FIG. 1 or FIG. The difference from Embodiment 1 in FIG. 1 is that a target object state management unit 701 that holds state information of a target object (details will be described later) is newly provided for the target object detected by the target object detection unit 110. That is.

  The operation of the video surveillance system configured as described above will be described with reference to FIGS. FIG. 10 is a flowchart for explaining the operation of the code amount control unit 109. First, the difference in operation of the code amount control unit 109 by providing the object state management unit 701 will be described. The code amount control unit 109 transmits the encoded information directly to other surveillance cameras 104 in addition to the site control device 105. Specifically, in step S801, the code amount control unit 109 is detected by the object detection unit 110. Based on the state information of the target object, the position of the target object is predicted, and in step S802, encoded information to be transmitted is calculated from the predicted position obtained in step S801, and the monitoring camera 104 to be transmitted is determined. Other steps are the same as those described in FIG.

  FIG. 11 is a diagram illustrating an example of object state management information managed by the object state management unit 701. The object state management information 901 includes an object ID item (such as ID1) for identifying the object, and a detected position item (such as a coordinate system obtained by projecting the detected three-dimensional position on the two-dimensional map). (Ax1, ay1), etc.), a moving direction item (NNE (north-northeast), etc.) indicating the moving direction of the object in a direction, a moving speed item (1 km / h, etc.) indicating the moving speed of the object, The heading direction is composed of orientation items (+10 degrees or the like) indicating the clockwise direction as a positive relative angle and the counterclockwise direction as a negative relative angle.

  In FIG. 12, a monitoring camera 903 (installation position: (x1, y1), a monitoring camera 904 (installation position: (x2, y2), and a monitoring camera 905 (installation position: (x3, y3)) indicate the monitoring camera 104 and are detected. A position 906 indicates an object detected by the object detection unit 110, and a predicted position 907 indicates a predicted movement position of the object at the detection position 906.

  In FIG. 10, in step S <b> 801, using the object information obtained from the object state management information 901, for example, the predicted position of the object is calculated by the following procedure. In the example of FIG. 12, the predicted position 907 is determined as to which position the object at the detection position 906 moves. The calculation of the predicted position is performed by the following procedure, for example.

(1) Obtain T for the time required for communication between surveillance cameras.
(2) The moving speed is corrected under the following conditions.
(A) -30 degrees ≤ orientation ≤ 30 degrees
Correction movement speed = movement speed x α
α is obtained experimentally and is 1.1 or the like.
(B) −90 degrees ≦ direction <−30 degrees or 30 degrees <direction ≦ 90 degrees
Correction movement speed = movement speed x β
β is obtained experimentally and is 0.8 or the like.
(C) Other than (A) and (B)
Correction movement speed = movement speed x γ
γ is obtained experimentally and is 0.5 or the like.
(3) Predicted position (xp, yp) = detected position + moving direction × moving speed

  In FIG. 10, in step S802, with reference to the predicted position information obtained in step S801, for example, the monitoring camera 104 that transmits the encoded information and the encoded information to be transmitted (the correction amount of the target camera code amount) are as follows. decide.

(1) The number of objects detected as objects is obtained from the code amount control information table 303 (see FIG. 3).
(2) The installation position of the monitoring camera 104 is obtained from the table 601 (see FIG. 8), and the distance from the object to the monitoring camera 104 is obtained for all the monitoring cameras 104.
When a plurality of objects are detected, for example, the object having the maximum size is selected and the following processing is performed.

(3) The correction amount of the target camera code amount is obtained under the following conditions.
(A) Distance from the object to the monitoring camera 104 ≦ X0
Target camera code amount correction amount = 0
(B) X0 <distance from the object to the monitoring camera 104 <X1
Correction amount of target camera code amount = α × distance to monitoring camera 104 + β
α is a negative number, and is obtained from the number of objects obtained in (1). The larger the number of objects, the larger the value. β is a correction term and is a value to be corrected in accordance with the environment where the monitoring camera 104 is installed.
(C) X1 ≦ distance from the object to the surveillance camera 104
Target camera code amount correction amount = 0
The correction amount of the target camera code amount indicates a ratio (for example, + 10%) for correcting the target camera code amount set for each monitoring camera 104 and is not only positive but also negative.

  (4) The surveillance camera 104 in which the correction amount of the target camera code amount obtained in (3) is other than 0 is determined as the transmission camera.

  As described above, according to the video monitoring system of the present embodiment, in addition to the configuration similar to that of the video monitoring system of the second embodiment, the object state management unit 701 is provided. Based on the distance between the monitoring camera 104 and the object detected by the object detection unit 110, the coding amount of each monitoring camera 104 can be quickly changed by correcting the code amount assigned to the other monitoring camera 104. it can.

  In the present embodiment, the positions of the monitoring camera 104 and the object are represented on the two-dimensional map, but the same can be applied to the three-dimensional world coordinate system.

  In the above description, when a plurality of objects are detected in step S802, the largest object is selected and processed, but the same process is performed for all objects. The sum of the correction amounts of the target camera code amount may be obtained, and the average may be obtained by dividing by the number of objects.

(Embodiment 4)
FIG. 13 is a block diagram showing a schematic configuration of a video surveillance system according to Embodiment 4 of the present invention. In the figure, the same parts as those in FIG. The difference from Embodiment 1 of FIG. 1 is that a site for calculating correction information (correction of site target code amount) of site encoding information based on the site encoding information held in site information management section 112. An information weight calculation unit 1001 is newly provided.

  The operation of the video surveillance system configured as described above will be described with reference to FIG. FIG. 14 is a flowchart for explaining the operation of the site information management unit 112.

  A description will be given of a portion where the operation of the site control unit 111 is different by providing the site information weight calculation unit 1001. The site control unit 111 is different in that it transmits site coding information directly to the site control apparatus 105 in addition to the central monitoring apparatus 102. Specifically, the correction information of the site encoding information is calculated in step S1101, and the site encoding information corrected in step S1102 is transmitted. The other steps are the same as described in FIG. More specifically, in step S1101, for example, the correction amount of the site target code amount is obtained by the following procedure.

(1) Referring to the table 306 of site encoding information, the sum of the number of objects detected within a predetermined time (for example, 1 hour) by the monitoring camera 104 in the monitoring site 101 is obtained.
(2) The correction amount of the site target code amount is obtained under the following conditions.
(A) Sum of the number of objects ≦ X0
Site target code amount correction amount = α × sum of the number of objects
α is a negative number and is set according to the installation environment of the monitoring site.
(B) X0 <sum of the number of objects <X1
Correction amount of site target code amount = 0
(C) X1 ≦ sum of the number of objects
Site target code amount correction amount = β x number of objects
β is a positive number and is set according to the installation environment of the monitoring site.

  The correction amount of the site target code amount indicates a ratio (for example, + 10%) for correcting the site target code amount set to 105 in each site control apparatus, and may take a negative value as well as a positive value. X0 and X1 are threshold values, and are experimentally determined according to the setting environment of the monitoring site.

  In step S1102, the site coding information (site target code amount correction amount) calculated in step S1101 is transmitted to another monitoring site 101.

  As described above, according to the video monitoring system of the present embodiment, since the site information weight calculation unit 1001 is provided in addition to the configuration of the video monitoring system of the first embodiment, monitoring is performed without using the central monitoring apparatus 101. By correcting the amount of code assigned to each site 101, the encoding condition of each monitoring camera 104 can be quickly changed.

(Embodiment 5)
FIG. 15 is a block diagram showing a schematic configuration of a video surveillance system according to Embodiment 5 of the present invention. In the figure, the same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted as appropriate. The difference from the first embodiment in FIG. 1 is that the video storage unit 115 is not provided in the central monitoring apparatus 102 but a video storage unit 1201 is newly provided in the site control apparatus 105.

  As described above, according to the video monitoring system of the present embodiment, by providing the video storage unit 1201 in the site control device 105, the central monitoring device can be used when displaying video data stored by the monitoring terminal 103. The load can be distributed to each site control apparatus 105 without the load being concentrated on the site 102.

  In the above description, the video storage unit 1201 is provided without providing the video storage unit 115. However, it is also possible to provide both. As an example of proper use of the video storage unit 1201, only video data in which an object is detected is stored in the video storage unit 115, and all video data is stored in the video storage unit 1201.

(Embodiment 6)
FIG. 16 is a block diagram showing a schematic configuration of a video surveillance system according to Embodiment 6 of the present invention. In the figure, the same parts as those in FIG. The difference from Embodiment 1 in FIG. 1 is that the monitoring camera 1308 is configured by a video input unit 1301 that captures video with an imaging device or the like and outputs the video to the site control device 1309, and the site control device 1309 is configured with the monitoring camera 1308. A video input unit 1302 for inputting video from the video, an encoding unit 1304 for encoding the video input by the video input unit 1302 by an encoding method such as MPEG, and image recognition from the video input by the video input unit 1302 The object detection unit 1303 for detecting the object by the site, the site information management unit 112 for holding the encoded information obtained from the object detection unit 1303 and the central monitoring device 102, and the code based on the encoded information held The site control unit 1305 set in the conversion unit 1304, the object detection result from the object detection unit 1303, and the code received by the transmitting / receiving unit 1307 The code amount is determined based on the information, the code amount control unit 1310 set in the encoding unit 1304, the encoded video data and the encoded information are transmitted to the network 121, or the encoded information is received from the central monitoring apparatus 102 A transmission / reception unit 1307.

  As described above, according to the video surveillance system of the present embodiment, the surveillance camera 1308 is the minimum component, and the site control device 1309 includes the encoding unit 1304 and the object detection unit 1303. By switching and using the encoding unit 1304, the object detection unit 1303, etc. in 1309 for each monitoring camera 1308 in a time-sharing manner, the encoding unit 107, the object detection unit 109, etc. of the monitoring camera 104 are unnecessary, and monitoring is performed. The cost of the camera 1308 can be reduced.

  In addition, the site information weight calculation unit 1001 of the fourth embodiment or the video storage unit 1201 of the fifth embodiment may be added to the present embodiment, or these may be combined.

  The present invention does not increase the load on the central monitoring apparatus even if a large-scale system is constructed in which the number of surveillance camera terminals or video surveillance terminals is very large, and further monitoring conditions without increasing the network. In addition, it is possible to efficiently encode the entire monitoring target space even when a specific space is monitored from different directions by a plurality of monitoring cameras. Can be applied.

1 is a block diagram showing a schematic configuration of a video surveillance system according to Embodiment 1 of the present invention. Flowchart for explaining the operation of the video surveillance system according to the first embodiment of the present invention. The figure for demonstrating the example of the management data of the video surveillance system which concerns on Embodiment 1 of this invention. The figure for demonstrating the example of the management data of the video surveillance system which concerns on Embodiment 1 of this invention. The figure for demonstrating the example of the management data of the video surveillance system which concerns on Embodiment 1 of this invention. The block diagram which shows schematic structure of the video surveillance system which concerns on Embodiment 2 of this invention. Flowchart for explaining the operation of the video surveillance system according to the second embodiment of the present invention. The figure for demonstrating the example of the management data of the video surveillance system which concerns on Embodiment 2 of this invention. The block diagram which shows schematic structure of the video surveillance system which concerns on Embodiment 3 of this invention. Flowchart for explaining the operation of the video surveillance system according to the third embodiment of the present invention. The figure for demonstrating the example of the management data of the video surveillance system which concerns on Embodiment 3 of this invention. The figure for demonstrating operation | movement of the video surveillance system which concerns on Embodiment 3 of this invention. The block diagram which shows schematic structure of the video surveillance system which concerns on Embodiment 4 of this invention. Flowchart for explaining the operation of the video surveillance system according to the fourth embodiment of the present invention. The block diagram which shows schematic structure of the video surveillance system which concerns on Embodiment 5 of this invention. The block diagram which shows schematic structure of the video surveillance system which concerns on Embodiment 6 of this invention. Block diagram showing schematic configuration of conventional video surveillance system Block diagram showing schematic configuration of conventional surveillance camera

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Monitoring site 102 Central monitoring apparatus 103 Monitoring terminal 104 Monitoring camera 105 Site control apparatus 106 Image | video input part 107 Coding part 108 Transmission / reception part 109 Code amount control part 110 Target object detection part 111 Site control part 112 Site information management part 113 Transmission / reception part 114 Transmission / Reception Unit 115 Video Storage Unit 116 Central Control Unit 117 Overall Information Management Unit 118 Reception Unit 119 Decoding Unit 120 Video Display Unit 121 Network 401 Installation Position Information Management Unit 701 Object State Management Unit 1001 Site Information Weight Calculation Unit 1201 Video Storage Unit 1301 Video Input Unit 1302 Video Input Unit 1303 Object Detection Unit 1304 Encoding Unit 1305 Site Control Unit 1306 Site Information Management Unit 1307 Transmission / Reception Unit 1308 Monitoring Camera 1309 Site Control Device

Claims (6)

A central monitoring device including a plurality of monitoring sites each including a plurality of monitoring cameras and one site control device, and a plurality of the monitoring cameras and the site control devices of each of the plurality of monitoring sites connected via a network. Prepared,
The surveillance camera is
Video input means for inputting video from the image sensor;
Encoding means for encoding the video input by the video input means;
Transmitting / receiving means for transmitting the video data encoded by the encoding means to the network;
Object detection means for detecting a specific object by image recognition from the video input by the video input means;
Code amount control means for setting the encoding condition in the encoding means with the detection information of the object detection means and the code amount control information received by the transmission / reception means via the network;
With
The site controller is
Site information management means for managing the encoded information of each of the plurality of surveillance cameras in the same site;
Site control means for determining the code amount of the surveillance camera in the same site from the encoded information held in the site information management means;
Transmission / reception means for transmitting the code amount control information obtained by the site control means to the network;
With
The central monitoring device is
Video storage means for storing encoded video data;
Overall information management means for holding encoded information of all of the plurality of monitoring sites;
Central control means for determining the code amount of the monitoring site from the encoded information held in the overall information management means,
Transmission / reception means for transmitting the code amount control information obtained by the central control means to the network;
A video surveillance system comprising:   The monitoring camera includes an installation position information management unit that holds camera installation position information, and the code amount control unit is based on the camera installation position information held in the installation position information management unit and is located in the vicinity. The video surveillance system according to claim 1, wherein a code amount is preferentially assigned to a camera.   The monitoring camera includes an object state management unit that holds state information of the object detected by the object detection unit, and the code amount control unit is configured to detect the object held by the object state management unit. The video surveillance system according to claim 1 or 2, wherein a code amount is preferentially assigned to the other surveillance cameras having a high object existence probability based on state information.   The site control device includes site information weight calculating means for calculating a weight of code amount allocation between the monitoring sites, and the site information weight calculating means detects the object of each monitoring camera in the monitoring site. The code amount allocation weight at the monitoring site for preferentially allocating the code amount to the monitoring site with a large number of detection results is calculated based on the number of detection results of the means. The video surveillance system described in 1.   The site control device includes a video storage unit that stores encoded video data transmitted from each of the monitoring cameras to the network, and the video storage unit only stores video data from the monitoring camera that has detected an object. The video surveillance system according to any one of claims 1 to 4, wherein the video surveillance system is stored. A central monitoring device including a plurality of monitoring sites each including a plurality of monitoring cameras and one site control device, wherein the plurality of monitoring cameras and the site control devices of each of the plurality of monitoring sites are connected via a network. A video surveillance system control method for a video surveillance system comprising:
The surveillance camera encodes a video obtained by imaging and transmits video data to the network, and also detects a specific target object by image recognition from the video obtained by imaging, and obtained detection information And setting the encoding condition in the encoding process using the code amount control information received via the network as an input,
The site control device determines the code amount of the monitoring camera in the same site based on the encoding information of each of the plurality of monitoring cameras in the same site, and transmits the code amount control information obtained thereby to the network. ,
The central monitoring apparatus accumulates encoded video data from the monitoring camera, holds encoding information of all of the plurality of monitoring sites, and code amount of the monitoring site by the stored encoding information A video surveillance system control method for determining the code amount and transmitting the code amount control information obtained thereby to the network.

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