JP4184996B2 - Surveillance video distribution system - Google Patents

Description

  The present invention relates to a monitoring video distribution system capable of appropriately distributing desired videos obtained from a plurality of monitoring cameras that capture images of a monitoring target to a terminal.

  2. Description of the Related Art Conventionally, in a surveillance video distribution system used when monitoring is performed using a plurality of surveillance cameras, a system for accumulating surveillance video is known. As this system, there is a system in which an apparatus for accumulating monitoring video is provided for each monitoring camera and an apparatus in which a monitoring video of all the monitoring cameras is stored in a center.

  However, in the former system, it is necessary to access each storage device and search for a video at a desired time, and there is a problem in which the storage device has a desired video. On the other hand, in the latter system, all video information has to be collected in the center, and there is a problem that a large-scale configuration is required.

  On the other hand, in the system described in Patent Document 1, the minimum necessary data is transferred to the center. However, the terminal does not select a desired video and is not a search system. It is enough.

Further, as described in Patent Document 2, an alarm notification (log) is sent to the terminal to display the alarm log data on the screen, or the image data stored in the storage unit is read when a request is received from the terminal. There is a sending system. However, even in this system, a video at a desired time obtained by any one of a plurality of surveillance cameras is not easily searched for at high speed from the terminal side to obtain a video.
Japanese Patent Laid-Open No. 11-275564 JP 2000-32437 A

  The problem to be solved by the present invention is to provide a surveillance video distribution system that is easy to search for videos from a plurality of surveillance cameras at high speed and that does not impose a transmission load by delivering necessary videos.

A surveillance video distribution system according to the present invention is installed in a surveillance station, and a plurality of surveillance cameras for imaging a surveillance target;
On the monitoring station, the al provided for each surveillance camera is a separate storage means for storing image information obtained from the monitoring camera is installed in the monitoring station, a plurality of sensors for detecting the presence or absence of event occurrence, including at least heat Image processing means installed in the monitoring station and performing image recognition on video information obtained from the monitoring camera and detecting at least an image change; and video information for each monitoring camera installed in the monitoring station Additional information sending means for sending additional information and imaging time information having at least the camera number of the image picked up, the sensor number of the sensor that detected the event occurrence, and the recognition result information including the image change result of the image recognition result ; , provided to the center, based on the additional information and the time information is sent via a transmission path by the additional information transmitting unit, additional information Correspondingly, using a database that stores event information corresponding to the camera installation location, monitoring object, sensor number, and event information corresponding to the image recognition result, the additional information is converted into text and the desired video obtained from any monitoring camera Index information for selecting information, and creating means for creating a list in which time information and event information are associated with each other so that video information captured by one camera can be selected by time; and A monitoring camera image stored in the individual storage means corresponding to the index information provided at the center and based on the index information selected by the terminal and transmitting the index information created by the creation means to the terminal When the distribution information is distributed to the terminal and the time of the index information is selected , Characterized by comprising a delivering device for delivering the video information captured from the selected time after the time for the video information of the monitoring cameras.

In the surveillance video distribution system according to the present invention, the monitoring station adds additional information corresponding to the video information to which the video information stored in the individual storage means and information indicating that the video information has been transferred to the center is attached. Transfer means for transferring information to the center, wherein the center receives the transfer of the video information stored in the individual storage means and stores the video information, and the video information When the information indicating that the video information sent together with the information is transferred to the center is sent, the storage address of the video information corresponding to the index information created from the additional information is changed to the address of the center storage means. And an address management means.

  In the surveillance video distribution system according to the present invention, the additional information includes a part of the video or a reduced video.

  The surveillance video distribution system according to the present invention is provided in the monitoring station and detects disconnection in a transmission path when transferring video information, and is provided in the monitoring station and the disconnection detection means. When it is detected that a disconnection has occurred in the transmission path, the video signal related to the transfer is stored in the individual storage means, and is transferred again after the transmission path is restored.

  In the surveillance video distribution system according to the present invention, when the detection information obtained by the sensor or the abnormality detection information obtained by image processing on the video information is obtained, the surveillance video distribution system according to the present invention sends the video information obtained by the corresponding surveillance camera to the center. A transfer means for transferring is provided.

  The monitoring video distribution system according to the present invention is provided in the center and includes index storage means for storing the index information created by the creation means, and index information provided in the center and stored in the index storage means. Providing means for providing the terminal with a group divided into a group of index information corresponding to video currently obtained from each surveillance camera and a group of index information corresponding to video obtained from each surveillance camera in the past It is characterized by comprising.

  The monitoring video distribution system according to the present invention is provided in the monitoring station and detects a disconnection in a transmission line when transferring additional information, and is provided in the monitoring station and the disconnection detecting means. When it is detected that a disconnection has occurred in the transmission path, additional information relating to the transfer is stored in the individual storage means, and is transferred again after the transmission path is restored.

  According to the surveillance video distribution system according to the above configuration, additional information relating to video information of the corresponding surveillance camera is transmitted, and index information for selecting desired video information obtained from any surveillance camera is created based on the additional information. Thus, the terminal can easily search for a desired video at high speed. Also, the monitoring station is provided with an individual storage means provided for each monitoring camera for storing video information obtained from the monitoring camera, and the video information corresponding to the case where any index information is selected by the terminal from the group of index information. Since it is distributed to the terminal, it is difficult to place a load on the transmission path by transmitting only necessary video information.

  In the present invention, the stored video information itself and the index information created from the additional information related to the content and status of the video for selecting the desired video information are separated, and the index information is stored in the center and provided to the terminal Realized. Embodiments of a surveillance video distribution system according to the present invention will be described below with reference to the accompanying drawings. In each figure, the same components are denoted by the same reference numerals and redundant description is omitted.

  FIG. 1 is a block diagram of a surveillance video distribution system according to the first embodiment. This system includes a center 1, a monitoring station 2, and a terminal 3. Usually, a plurality of monitoring stations 2 and terminals 3 are provided. The monitoring station 2 includes a plurality of monitoring cameras 21 that capture images of the monitoring target, an individual video storage unit 22 that receives a video signal from the monitoring camera 21, and a transmission unit 23 that performs data transmission.

  The center 1 includes a central management unit 11, a central video storage unit 12, an external media writing unit 13, and a transmission unit 14. The central management unit 11 performs management related to video distribution obtained from the monitoring station 2. The central video storage unit 12 is a part that stores video information from the monitoring station 2. The external media writing unit 13 is a configuration unit that writes the video information stored in the central video storage unit 12 to an external medium.

  The terminal 3 is a personal computer, for example, and includes a display unit 31 and an operation unit 32 such as a keyboard. The terminal 3 is connected to a transmission unit 33 that performs data transmission. One or more terminals 3 are provided.

  The individual video storage unit 22 is configured as shown in FIG. That is, the video input unit 221, the video conversion unit 222, the control unit 223, the video storage unit 224, and the transmission unit 225 are connected to the bus 226. The video input unit 221 is a part that captures video information from the monitoring camera 21. The video conversion unit 222 performs data conversion into a format such as MPEG2 that can transmit, for example, an NTSC signal related to video information obtained by the monitoring camera 21 from the transmission unit via the network. The control unit 223 controls each unit of the individual video storage unit 22, and receives an event occurrence signal from a sensor 28 (in the figure, one, but may be composed of a plurality) such as thermal sensor. The video information received from the video input unit 221 is recognized and an abnormality is detected. The video storage unit 224 is an individual storage unit that stores the video information output from the video conversion unit 222. When the capacity is exceeded, the video storage unit 224 overwrites the oldest video information portion and stores a new one. is there. The transmission unit 225 transmits the video information output from the video conversion unit 222 or the video information stored in the video storage unit 224 via the transmission unit 23 when necessary under the instruction of the control unit 223. .

  The control unit 223 constitutes additional information transmission means for transmitting additional information related to video information of the corresponding monitoring camera (here, the monitoring camera 21). That is, on / off information about the detection signal of the sensor 28, information such as an image change or an intruder detected as a result of image recognition is detected after a predetermined sampling time, and this is detected by the camera ID. It is sent to the center 1 as additional information together with (identification information). As the additional information, the user (operator) monitors the image and operates the terminal such as a computer to give to the control unit 223. The input operation information can also be used, and necessary information is added. It becomes possible to make information.

  In the center 1, the central management unit 11 receives the additional information and creates index information. The central management unit 11 is configured as shown in FIG. That is, the central management unit 11 has a configuration in which an index information creation unit 111, an information search unit 112, a control unit 113, an index information database 114, and a communication unit 115 are connected by a bus 116.

  The communication unit 115 sends and receives data to and from the transmission unit 14, receives additional information sent from the monitoring station 2, and sends it to the index information creation unit 111 under the control of the control unit 113. The index information creation unit 111 creates index information for selecting desired video information obtained from any monitoring camera based on the received additional information and accumulates it in the index information database 114. The information retrieval unit 112 retrieves corresponding index information from the index information database 114 based on a request from the terminal under the control of the control unit 113, and sends it from the communication unit 115 to the terminal 3. The control unit 113 controls each unit of the central management unit 11.

  The central video storage unit 12 has a configuration in which a communication unit 121, a control unit 122, a video storage unit 123, and an input / output port 124 are connected by a bus 125. The communication unit 121 transmits and receives data to and from the transmission unit 14 and accumulates incoming video information in the video storage unit 123 under the control of the control unit 122. The control unit 122 controls each unit and reads out the video information stored in the video storage unit 123 according to a request from the central management unit 11 and sends it to the terminal 3. The input / output port 124 is connected to the external media writing unit 13 and serves as a path for receiving a request from the external media writing unit 13 and a path for sending video information read by the control unit 122.

  The operation of the surveillance video distribution system configured as described above will be described. The monitoring camera 21 captures an image of the monitoring target, and a video signal is sent to the individual video storage unit 22. The video signal reaches the video conversion unit 222 from the video input unit 221 of the individual video storage unit 22 and is converted into video information such as MPEG2. The converted video information is stored in the video storage unit 224 under the control of the control unit 223.

  On the other hand, the control unit 223 performs image recognition using the video information, and captures and detects the signal of the sensor 28. The control unit 223 sends the detection result as additional information from the transmission unit 225 to the center 1. As the additional information, for example, as shown in FIG. 5, the camera ID (identification information) is “01”, the sensor # 1 in the sensor 28 is ON, the sensor # 2 is OFF, for example, and the result of image recognition As for the information “1”, the time information and the like are further set, and the address of the center 1 is added and sent.

  In the center 1, the index information creation unit 111 of the central management unit 11 receives the additional information via the communication unit 115 via the transmission unit 14 and creates index information. The index information creation unit 111 includes a database storing event information corresponding to the installation location, the monitoring target, the sensor number, and the event information corresponding to the image recognition result information corresponding to each camera ID. Index information corresponding to the additional information sent by reference is created.

  FIG. 6 shows an example of index information obtained at present. Since a plurality of surveillance cameras are installed, information is written corresponding to each camera number. This index information is stored in the index information database 114 in association with the time information.

  When a user searches for video from the terminal 3, the user requests and accesses index information to the central management unit 11 of the center 1. In response to this, the control unit 113 gives an instruction to the information search unit 112 to read the current index information from the index information database 114 and send it to the terminal 3 via the communication unit 115. In the terminal 3, the index information as shown in FIG. Although this index information is current, the past index information is displayed by one sampling each time the button B for shifting to “past” is operated. That is, the operation information of the button B is sent to the information search unit 112 of the central management unit 11, and in response to this, the past index information is taken out from the index information database 114 by one sampling and sent to the terminal 3. In the past index information, in addition to the button B for shifting to “past”, a “return” button for returning to the present one sampling at a time is displayed.

  When the index information as shown in FIG. 6 is displayed, when the camera number is clicked, the history index information corresponding to the surveillance camera related to the clicked camera number is as shown in FIG. Is displayed. That is, the camera number, installation location, and monitoring target are displayed at the top, and event information is displayed along with the time. In the index information, a “return” button for returning to index information corresponding to all the monitoring cameras as shown in FIG. 6 is displayed. That is, the information search unit 112 of the central management unit 11 extracts the history of index information corresponding to one monitoring camera from the index information database 114 and sends it to the terminal 3 in the format of FIG.

  In the display of the index information shown in FIG. 7, for example, when a desired time is clicked, a video request at the time obtained by the monitoring camera is obtained. Upon receiving this, the control unit 113 of the central management unit 11 sends a video distribution instruction to which the address of the terminal 3, time information, and camera number are added to the control unit 223 in the individual video storage unit 22 of the monitoring station 2. The control unit 223 calculates the corresponding frame of the video stored in the video storage unit 224 from the time information, extracts video information from the subsequent (current direction), and distributes it to the terminal 3. As described above, index information is created collectively for the videos obtained by the plurality of monitoring cameras in the center 1 and provided to the terminal 3, from which a desired video can be searched. Since the video information itself is distributed and stored in the monitoring station, it is not necessary to transmit all of the video information to the center 1 and the center 1 does not need a large capacity storage device.

  Video is stored in the video storage unit 123 of the central video storage unit 12 in the following cases. First, when the control unit 223 detects predetermined event information set in advance in the monitoring station 2. That is, this is a case where a detection signal comes from a predetermined sensor in the sensor 28 or a case where a predetermined state is recognized in image recognition. In such a case, the video information is sent to the central video storage unit 12 of the center 1 with or without being stored in the video storage unit 224. When the video information is sent to the central video storage unit 12 of the center 1, information to that effect is attached to the additional information, and based on this, the control unit 113 of the central management unit 11 relates to the video information at the time at the monitoring camera. Holds storage location information. Thus, the control unit 113 has a function of an address management unit that changes the storage address of the video information corresponding to the index information in response to the video information accumulation. Note that the video information is transmitted, for example, until a predetermined time after the predetermined event information is not detected.

  When there is a request from the terminal 3. For example, as described above, the terminal 3 requests by performing a search based on the index information and viewing the search result or the video of the search result. This request is realized by providing a recording request button on a part of the index information or the video to be distributed or by sending a separate request input from the operation unit 32 to the control unit 113 of the central management unit 11. Based on the request from the terminal 3, the control unit 113 sends a request to the control unit 223 in the monitoring station 2. Basically, video information is sent to the center 1 in the same manner as in the case of distribution to the terminal 3. In other respects, the same processing as when the control unit 223 detects predetermined event information set in advance is performed. Note that the video information is transmitted until a termination instruction is given by the terminal 3 or until a predetermined time after the recording request.

  The control unit 223 of the monitoring station 2 is provided with disconnection detection means for detecting disconnection in the transmission path when the video information is transmitted. For example, when video information is transmitted, a reply is requested from the center 1 side at regular intervals, and when it returns, the reply is normal, and if there is no reply, the video information sent to the center 1 side is stored. Stored in the unit 224. Thereafter, when a reply is requested and there is a reply from the center 1 side, the video information stored in the video storage unit 224 is transmitted again.

  Further, when transmitting additional information, a reply is requested from the center 1 side at regular intervals, and when this is returned, the reply is normal. If there is no reply, the additional information sent to the center 1 side is stored as a video. Stored in the unit 224. Thereafter, when a reply is requested and there is a reply from the center 1 side, the additional information stored in the video storage unit 224 is transmitted again.

  In the above example, the video information is immediately distributed by clicking the time for the index information shown in FIG. 7. For example, the control unit of the monitoring station 2 displays a still image corresponding to the time or a reduced image thereof. 223 is created and transmitted to the terminal 3. A still image or a reduced image thereof is displayed on the display unit 31 in the terminal 3, and an instruction to select the still image is given from the operation unit 32 to distribute subsequent video information. As a result, it is possible to receive actual distribution after viewing the preview image, which is convenient.

The block diagram of the monitoring image delivery system which concerns on this invention. The principal part block diagram of the monitoring image delivery system which concerns on this invention. The principal part block diagram of the monitoring image delivery system which concerns on this invention. The principal part block diagram of the monitoring image delivery system which concerns on this invention. The figure which shows an example of the additional information sent to the center from the monitoring station in the monitoring image delivery system which concerns on this invention. The figure which shows an example of the index information sent to the terminal from the center in the monitoring image delivery system which concerns on this invention. The figure which shows an example of the index information sent to the terminal from the center in the monitoring image delivery system which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Center 2 Monitoring station 3 Terminal 11 Central management part 12 Central video storage part 13 External media writing part 14,23,33 Transmission part 21 Monitoring camera 22 Individual video storage part 31 Display part 33 Operation part

Claims (7)

A plurality of monitoring cameras installed in the monitoring station and imaging the monitoring target;
On the monitoring station, the al provided for each surveillance camera is a separate storage means for storing image information obtained from the monitoring camera,
A plurality of sensors that are installed in the monitoring station and detect the presence or absence of an event including at least heat;
Image processing means installed in the monitoring station and performing image recognition on video information obtained from the monitoring camera and detecting at least an image change;
At least the camera number captured in the video information for each monitoring camera, the sensor number of the sensor that detected the occurrence of the event, and the recognition result information including the image change with respect to the image recognition result. Additional information sending means for sending the additional information and imaging time information ;
Based on the additional information and time information that are provided in the center and sent via the transmission path by the additional information sending means, the camera installation location, the monitoring target, the event information corresponding to the sensor number, the image corresponding to the additional information Index information for characterizing additional information and selecting desired video information obtained from any monitoring camera using a database storing event information corresponding to the recognition result, and captured by one camera Creating means for creating a list in which time information and event information are associated with each other so that video information can be selected according to time ;
The monitoring information stored in the individual storage means corresponding to the index information provided in the center and based on the index information selected by the terminal from the index information created by the creation means to the terminal. Distribution means for distributing video information to the terminal, and when the time of the index information is selected, distributes video information captured after the time from the time selected for the video information of the corresponding monitoring camera. A monitoring video distribution system comprising: a distribution unit. Transfer to the monitoring station for transferring to the center video information stored in the individual storage means and additional information corresponding to the video information to which information indicating that the video information has been transferred to the center is attached Means.
In the center, center storage means for receiving the transfer of the video information stored in the individual storage means and storing the video information;
When information indicating that the video information sent together with the video information has been transferred to the center is sent, the storage address of the video information corresponding to the index information created from the additional information is set to the address of the center storage means. monitoring video distribution system according to claim 1, characterized in that it comprises an address management unit that changes to. The surveillance video distribution system according to claim 1, wherein the additional information includes a part of the video or a reduced video . A disconnection detecting means provided in the monitoring station for detecting a disconnection in the transmission line when transferring video information;
Provided in the monitoring station, when it is detected by the disconnection detecting means that a transmission path is disconnected, the video signal related to the transfer is stored in the individual storage means, and is transferred again after the transmission path is restored. The surveillance video distribution system according to claim 2 . The monitoring station has a transfer means for transferring the video information obtained by the corresponding monitoring camera to the center when the detection information by the sensor or the abnormality detection information by image processing on the video information is obtained. The surveillance video distribution system according to claim 2. Index storage means provided in the center for storing index information created by the creation means;
A group of index information provided in the center and stored in the index storage means includes a group of index information corresponding to a video currently obtained from each surveillance camera, and a video obtained from each surveillance camera in the past. Providing means for providing the terminal with a group of index information corresponding to
The surveillance video distribution system according to claim 1, further comprising: A disconnection detecting means provided in the monitoring station for detecting a disconnection in the transmission line when transferring additional information;
Provided in the monitoring station, when it is detected by the disconnection detecting means that a transmission line is disconnected, the additional information related to the transfer is stored in the individual storage means and retransmitted after the transmission path is restored. The surveillance video distribution system according to claim 2 .

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