JP6216138B2 - Image management system and center device - Google Patents

Description

  The present invention relates to an image management system and a center apparatus in which image data recorded in an imaging apparatus is transferred to a center apparatus, and more particularly to a technique for dealing with a lack of image data.

  In recent years, there has been known a monitoring system in which a certain recording area is provided in the monitoring camera itself, the monitoring image is accumulated in the storage area, and the image is output to a center device via a network at a predetermined timing. For example, in Patent Document 1, when a certain requirement such as a communication abnormality occurs for a monitoring camera that transfers a captured image to a remote server, image data starts to be accumulated in an internal memory, and then the image accumulated when a request is received from the server Is disclosed for a camera that transmits.

JP 2006-186739 A

  However, when image data captured by the camera itself is recorded and the recorded image is transmitted to a remote server at a predetermined timing, if the best effort type communication using the IP network is used, the bandwidth is reduced due to external factors. May be pressed, and a transfer rate assumed in advance may not be ensured. As a result, if the transfer of the image data is delayed beyond the limit, the recording pace of the newly acquired image exceeds the pace at which the image is transferred, and the recording capacity in the camera is increased before the data transfer is completed. There is a risk that the image data will be overwritten. As another possibility, the possibility that untransmitted image data is overwritten due to a problem on the system is not zero. If the image data transferred to the center is missing, it is necessary to determine which of these two possibilities is necessary in order to investigate the cause of the image loss.

  For example, when a failure related to the transfer of image data is suspected, it is preferable to prompt the management of the monitoring area and the imaging device to confirm the cause and deal with the problem at the site where the image data is transferred. In case of doubt, it is preferable that the operator who operates the system confirms the cause and takes measures.

  The present invention has been made in view of the above problems, and in an image management system that transfers image data recorded in an imaging device to a center device, a person who is responsible for the loss of image data. An object of the present invention is to provide an image management system capable of prompting the user to cope with the problem.

  An image management system according to the present invention includes an imaging unit including an imaging unit that acquires image data of a monitoring area and a recording unit that records the acquired image data, and an accumulation record that records image data transferred from the imaging device. An image management system including a center device including a transfer unit, wherein the imaging device manages whether or not the image data recorded in the recording unit has been transferred to the center device; A response unit that transmits information of image data managed as untransferred by the transfer management unit to the center device at a timing, and the center device determines an abnormality related to data communication with the imaging device A communication abnormality determination unit, a missing monitoring unit that monitors whether or not image data received from the imaging device is missing, and the missing monitoring unit determines that there is a missing image data If provided with the imaging apparatus falling within the past predetermined time in accordance with whether or not an abnormality relating to the data communication has been determined, the missing abnormality processing unit that transmits the missing abnormality information to different destinations, the.

  According to the present invention, the imaging device records the image data acquired by the imaging unit in the recording unit and transmits it to the remote center at a predetermined timing. When there is a lack of image data that the image data that should have been recorded is not recorded in the image data received from the imaging device at a predetermined timing, the center device within the past predetermined time It is determined whether or not an abnormality in data communication has been detected, and missing abnormality information is transmitted to different destinations according to the determination result. In this way, it is possible to send missing abnormality information to a person (appropriate transmission destination) who is responsible for the loss of image data. A person who has received the missing abnormality information can investigate the cause of the missing of the image data and take an appropriate response to the cause.

  In the image management system of the present invention, the center device further determines a management contact address storage unit that stores in advance contact information of a manager of the monitoring area or the imaging device, and an abnormality related to the data communication. An abnormality information transmitting unit that transmits preliminary abnormality information to the administrator corresponding to the case, and the missing abnormality processing unit is within a past predetermined time when the missing monitoring unit determines that there is a missing image data. If the abnormality related to the data communication is determined for the imaging device corresponding to the above, the missing abnormality information may be transmitted to the corresponding administrator.

  In this case, the center device stores in advance information about the monitoring area or the administrator of the imaging apparatus that acquires and records the image data of the monitoring area, and an abnormality in data communication regarding the corresponding imaging apparatus is detected within the past predetermined time. If the image data is missing after that, the abnormal abnormality information is transmitted to the manager (user or customer) of the monitoring area. The administrator is notified in advance of abnormalities related to data communication (preliminary abnormality information). At that time, the bandwidth is secured by improving the communication traffic in the monitoring area, and the image data is transferred promptly. The measures should be taken to prevent data overwriting. Therefore, after that, if a missing abnormality occurs in the imaging device, the information about the missing abnormality is notified to this administrator so that the previous action is insufficient, and an appropriate action is taken. Can be encouraged.

In the image management system of the present invention, the center device further includes an operation contact storage unit that stores in advance contact information of an operator of the image management system, and the missing abnormality processing unit includes the missing monitoring. When the unit determines that the image data is missing, the missing abnormality information may be transmitted to the operator if the abnormality related to the data communication is not determined for the imaging device in the past predetermined time.

  In this case, the center device stores information of the operator of the image management system in advance, and if no abnormality in data communication related to the imaging device has been detected within the past predetermined time, the center device lacks information for the operator of the image management system. Send anomaly information. If a defect related to data communication is not detected in the imaging device before the image data is lost, overwriting or disappearance of the image data due to a problem on the system is suspected. Therefore, in this case, information about the missing abnormality is communicated to the system operator. In response to this, the operator can investigate the cause of the missing image and take necessary measures such as solving the problem on the system.

  Further, in the image management system of the present invention, in the center device, the communication abnormality determination unit performs data communication with the imaging device when the amount of image data managed as untransferred by the imaging device is equal to or greater than a threshold value. It may be determined that there is an abnormality.

  In this case, the abnormality in data communication related to the imaging apparatus is an abnormality in data transfer delay that means that the amount of untransmitted data exceeds a predetermined threshold. When an abnormality in the data transfer delay is detected, the supervisor of the monitoring area or the imaging device secures a band such as improving communication traffic in the monitoring area and takes measures to promptly transfer the image data.

  In the image management system of the present invention, the imaging device further includes a recording control unit that manages the image data by assigning a new recording ID based on a predetermined rule each time recording of the image data is started. In the center device, the missing monitoring unit compares the recording IDs of a plurality of image data received from the imaging device, and determines that the image data is missing when the predetermined rule is not met. Also good.

  In this case, every time recording of image data is started (every recording event), the imaging device attaches a recording ID (sequential identification index) based on a predetermined rule to the image data and records it in the recording unit. The center device can determine that the image data is missing when the recording ID of the image data received from the imaging device at a predetermined timing is missing (when the recording ID is discontinuous). . In this way, it is possible to appropriately determine the lack of image data.

  The center device of the present invention is a center device including an accumulation recording unit that records image data of a monitoring area transferred from the imaging device in the image management system, and receives information on the image data transmitted from the imaging device. A communication abnormality determining unit that determines an abnormality related to data communication with the imaging device, a missing monitoring unit that monitors whether image data received from the imaging device is missing, and the missing monitoring unit When it is determined that there is a missing image data, a missing abnormality process that transmits missing abnormality information to different destinations depending on whether or not an abnormality related to the data communication has been determined for the corresponding imaging device within a predetermined time in the past. And a section.

  Also in this center device, as in the above-described system, the center device has a lack of image data that the image data that should have been recorded is not recorded in the image data received from the imaging device at a predetermined timing. If there is, it is determined whether an abnormality in data communication related to the imaging apparatus has been detected within a predetermined time in the past, and missing abnormality information is transmitted to different transmission destinations according to the determination result. In this way, it is possible to send missing abnormality information to a person (appropriate transmission destination) who is responsible for the loss of image data. A person who has received the missing abnormality information can investigate the cause of the missing of the image data and take an appropriate response to the cause.

  According to the present invention, when there is a loss of image data in an image management system that transfers image data recorded in an imaging device to a center device, it is possible to prompt a person who is responsible for the loss of the image data.

Explanatory drawing which shows the whole structure of the image management system in embodiment of this invention The block diagram which shows the structure of the surveillance camera in embodiment of this invention The block diagram which shows the structure of the center apparatus in embodiment of this invention The sequence diagram which shows the flow of a process of the whole image management system in embodiment of this invention The flowchart which shows the flow of the process (recording process of image data) in the surveillance camera of embodiment of this invention The flowchart which shows the flow of the process (image data transfer process) in the surveillance camera of the embodiment of the present invention The flowchart which shows the flow of the process (capacity monitoring process) in the surveillance camera of embodiment of this invention The flowchart which shows the flow of the process (accumulation process) in the center apparatus of embodiment of this invention The flowchart which shows the flow of the process (delay determination process) in the center apparatus of embodiment of this invention The flowchart which shows the flow of the process (missing determination process) in the center apparatus of embodiment of this invention

  Hereinafter, an image management system according to an embodiment of the present invention will be described with reference to the drawings. In this embodiment, a case of an image management system used for a monitoring system or the like is illustrated.

<Overall configuration>
A configuration of an image management system according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram showing the overall configuration of the image management system 100 of the present embodiment. As shown in FIG. 1, the image management system 100 is installed in a monitoring area such as a store, and remotely manages to store the video of each monitoring camera 200 and the monitoring camera 200 (imaging device) that captures the area. The center apparatus 300 is installed in a center or the like. In addition, an image recording device for storing the video of the monitoring camera 200 in the area may be installed in the monitoring area.

  The surveillance camera 200 digitally encodes images taken at each installation location and records them as image data in a built-in image recording unit 208 (recording medium such as an SD card). The timing of image recording is set in advance at all times, for example, within a scheduled period or when a sensor is detected. The image data is H.264. It may be acquired as a moving image in H.264 format or the like, or may be acquired by generating a still image in JPEG format or the like at a predetermined frame rate. Further, the image data may include audio data. The monitoring camera 200 is connected to the management center via a network, and transmits the image data recorded in the image recording unit 208 at a predetermined timing.

  As the network, for example, the Internet network can be used. Here, the Internet network will be described as an example. However, the present invention is not limited to this, and a publicly available network such as a public telephone network or a mobile phone network may be selected as appropriate. In addition, a general technology can be used for a communication protocol, an exchange facility such as a gateway, an Internet service provider facility, etc., but detailed description thereof is omitted here.

  The management center is a facility operated by an organization (such as a security company) that centrally manages the image data of the monitoring camera 200 and provides a monitoring image storage service to a plurality of monitoring areas. The center device 300 disposed in the management center is a server device that accumulates and manages image data acquired by the monitoring camera 200. The center device 300 acquires image data from the monitoring camera 200 and records it in the storage / recording unit 304, and a service user of the image management system 100 (hereinafter simply referred to as “usage”) such as a manager of a monitoring area that wants to view the image data. And the corresponding image data is transmitted.

<Monitoring camera>
Next, the configuration of the monitoring camera 200 will be described with reference to FIG. As shown in FIG. 2, the monitoring camera 200 includes an optical system 201, an image sensor 202, an image analog / digital converter (A / D) 203, an image compression circuit 204, and a communication unit 205. The monitoring camera 200 also includes a processing unit 206, a storage unit 207, and an image recording unit 208. The processing unit 206 transfers the recording control unit 209, the first response unit 210, and the second response unit 211 to each other. A management unit 212 and a capacity monitoring unit 213 are provided.

  For example, the optical system 201 is configured with a lens or the like, and the imaging element 202 is configured with a CCD or the like. The image recording unit 208 is configured with an SD card or the like. The communication unit 205 has a function of performing data communication with the center apparatus 300. In the present embodiment, the image data of the monitoring area is acquired by the image sensor 202, and the acquired image data is recorded in the image recording unit 208. Therefore, here, the imaging element 202 corresponds to the imaging unit of the present invention, and the image recording unit 208 corresponds to the recording unit of the present invention.

  The monitoring camera 200 is installed in the monitoring area in a state where a camera ID for identifying each monitoring camera 200 is stored in the storage unit 207 in advance.

  The monitoring camera 200 stores shooting information preset by the user in the storage unit 207, and records image data captured based on the shooting information. As shooting information, shooting conditions such as shooting interval (frame rate) and image quality (image size and compression rate) are set in advance and stored in the storage unit 207. Further, the recording mode is stored in the storage unit 207 as shooting information. The recording mode includes a continuous recording mode in which image data to be captured is always recorded, a period recording mode in which image data is continuously recorded only within a specified period, and image data only when a detection signal is received from a monitoring sensor. And a sensor-linked recording mode for recording. The monitoring camera 200 executes recording processing according to the shooting information according to the time zone by setting shooting information as a schedule (monitoring schedule) that combines these modes and shooting conditions.

  The monitoring camera 200 converts the image signal input from the image sensor 202 into a digital signal by the image analog / digital converter 203 at the shooting interval stored as shooting information, and the image compression circuit 204 converts the image signal to the image quality stored as shooting information. According to the corresponding parameters, H.264 is used as an image compression encoding method. Compressed encoded data (image data) compliant with the H.264 / MPEG-4 AVC standard is generated. The image compression encoding method may be other standards such as the MPEG2 Video standard, and may be generated as a still image such as the JPEG standard. Also, cameras of different image compression encoding methods may be mixed on the LAN, or one camera may switch the image compression encoding method. The generated image data is recorded in the image recording unit 208.

  Here, one recording event is defined from the start to the end of image data recording based on the photographing information. The image data recorded at this time is given a different recording ID for each recording event by a recording control unit 209 (described later).

  Further, the user accesses a communication address (such as an IP address) set in the communication unit 205 of the monitoring camera 200 from a client device 400 such as a personal computer (see FIG. 1) using a dedicated application or a web browser. By inputting identification information such as a preset ID and password, it is possible to refer to currently captured image data.

  The image recording unit 208 is divided into a plurality of small area blocks (hereinafter referred to as clusters) with a recording area as a unit for each predetermined capacity (for example, 32 MB). A cluster ID is assigned in advance for each cluster. For example, if the capacity of the image recording unit 208 is 4 GB, the recording area of the image data excluding the recording area for control information and the like is divided into 112 clusters. The cluster ID is a sequential code that follows a specific rule.

  Here, the terms are explained. The “record ID” is a sequential code (a simple example is an alphanumeric serial number) according to a specific rule, and is given sequentially for each recording event. The “cluster ID” is a sequential code according to a specific rule (a simple example is an alphanumeric sequence number), and is sequentially assigned to each recording area divided in units of 32 MB in the image recording unit 208. The “cluster table” includes, for each cluster ID (that is, for each cluster of the image recording unit 208), the recording ID of the recorded image data, meta information of the image data (shooting time, camera ID, shooting conditions), Store the transfer flag. The “record ID table” is a cluster range (first cluster ID and last cluster) in which corresponding image data is recorded in the image recording unit 208 for each record ID (that is, for each record event for recording image data). ID) is stored. The “transfer flag” functions as an index for identifying whether or not the image data recorded in the corresponding cluster has been transferred to the center apparatus 300, and is flag information that is ON (flag is established) for the cluster to which the image data has been transferred. is there. In the initial state where the image data is recorded in the cluster, it is set to OFF (flag is not established). The cluster table and the recording ID table are stored in the storage unit 207.

  The recording control unit 209 manages the recording area of the image recording unit 208 by dividing the recording area into clusters for each predetermined recording unit, and controls to sequentially record the image data acquired by the image sensor 202 in the cluster. When the schedule recorded in the shooting information arrives, the recording control unit 209 performs control to sequentially store the image data acquired on the image sensor 202 side (image data generation side) in a writable cluster. A writable cluster is a cluster in which no image data is recorded and a cluster in which the transfer flag is ON. In addition, the recording control unit 209 determines the most when there is no writable cluster of image data to be newly acquired in the image recording unit 208, such as when the state in which the image data is not transferred to the center device 300 continues. Control is performed to overwrite image data for clusters recorded in the past. This is based on the idea that the latest image data at present is prioritized over the past image data. When recording the image data, the recording control unit 209 updates the cluster table and also updates the recording ID table. When image data is recorded, the transfer flag is set to OFF as an initial value.

  The recording control unit 209 manages image data by assigning a new recording ID based on a predetermined rule every time recording of image data is started. The recording control unit 209 assigns a recording ID (sequential identification index) to the image data for each recording event.

  The first response unit 210 transmits untransferred information indicating the amount of image data managed as untransferred by the transfer management unit 212 and the capacity of the image recording unit 208 to the center apparatus 300 at a predetermined timing. More specifically, when the first response unit 210 receives a list data acquisition request from the center device 300, the first response unit 210 extracts image data for which the transfer flag is OFF in the cluster table. The image data information is generated as an untransfer list (untransfer information). The non-transfer list is a list obtained by extracting the transfer flag OFF from the cluster table. Like the cluster table, the recording ID of the image data and the meta information are associated with each cluster ID. Then, the first response unit 210 transmits the untransferred list to the center apparatus 300. At this time, the total number of clusters in the image recording unit 208 is transmitted to the center apparatus 300.

  The second response unit 211 reads out the image data managed as untransferred from the image recording unit 208 after the first response unit 210 has transmitted the untransfer list, and transmits the image data to the center apparatus 300. More specifically, when the second response unit 211 receives an acquisition request from the center device 300 for the image data in the list after transmitting the untransferred list, the second response unit 211 is designated. The received image data is transmitted to the center apparatus 300. In the image data acquisition request from the center apparatus 300, the cluster ID described in the untransferred list is specified, and the second response unit 211 reads out the image data stored in the area of the cluster ID and transmits it to the center apparatus 300. To do.

  The transfer management unit 212 manages whether the image data recorded in the image recording unit 208 has been transferred to the center apparatus 300. In addition, when receiving a completion notification from the center apparatus 300, the transfer management unit 212 manages the image data transmitted by the second response unit 211 as having been transferred. In this case, when the transfer management unit 212 receives a storage completion notification from the center apparatus 300 for each cluster of the image recording unit 208, the transfer management unit 212 manages that the transfer has been completed. More specifically, when the transfer management unit 212 receives the accumulation completion signal for the cluster ID from the center device 300 when the image data is transmitted with the cluster ID specified by the center device 300, the transfer management unit 212 Set the transfer flag of the corresponding cluster to ON in the cluster table.

  The capacity monitoring unit 213 monitors the capacity of the image data managed by the transfer management unit 212 as untransferred. In this case, the capacity monitoring unit 213 has a capacity of the image data that is not transferred with respect to the capacity of the image recording unit 208 that is greater than or equal to a second predetermined ratio that is greater than the first predetermined ratio for determining the accumulation delay in the center device 300. For example, the remaining amount abnormality signal is transmitted to the center device 300. More specifically, the capacity monitoring unit 213 determines the remaining amount if the number of clusters for which the transfer flag is OFF is greater than or equal to a predetermined remaining amount threshold (for example, 80% or more of the total number of clusters) for all clusters. Judge abnormalities. In other words, it can be said that the capacity monitoring unit 213 monitors the number of writable clusters (clusters in which no image data is recorded and clusters in which the transfer flag is ON) in the image recording unit 208 excluding clusters in which the transfer flag is OFF. . That is, the capacity monitoring unit 213 obtains a ratio between the number of writable clusters and the total number of clusters, and the number of writable clusters is equal to or less than a predetermined remaining amount threshold with respect to the total number of clusters (for example, the number of writable clusters is all clusters). (20% or less of the number), the remaining amount abnormality may be determined, and the same effect can be obtained. When the capacity monitoring unit 213 determines the remaining amount abnormality, the capacity monitoring unit 213 transmits a remaining amount abnormality signal to the center device 300. At this time, an abnormal lamp (not shown) of the monitoring camera 200 may be turned on.

<Center device>
Next, the configuration of the center apparatus 300 will be described with reference to FIG. As shown in FIG. 3, the center apparatus 300 includes a communication unit 301, a storage unit 302, a control unit 303, and an accumulation recording unit 304. The control unit 303 includes an accumulation processing unit 305, an accumulation delay determination unit 306, a completion notification unit 307, an abnormality information transmission unit 308, a browsing reception unit 309, a missing monitoring unit 310, and a missing abnormality processing unit 311. .

  The communication unit 301 receives the untransfer list transmitted from the monitoring camera 200 and the capacity of the image recording unit 208. The communication unit 301 receives image data (image data managed as untransferred) transmitted from the monitoring camera 200 after transmitting the untransferred list. The communication unit 301 corresponds to the receiving unit of the present invention.

  The storage unit 302 stores, as user information, information on the monitoring area corresponding to each service user of the image management system 100 such as a manager of the monitoring area and the camera ID of the monitoring camera 200 installed there. Yes. In the user information, identification information such as an ID and a password for identifying the user (administrator) is also stored. The user information also stores contact information of the user (administrator) such as the name, telephone number, and e-mail address of the user (administrator). This storage unit 302 corresponds to the management contact information storage unit of the present invention.

  In addition to the user information, the storage unit 302 stores contact information of the operator of the image management system in advance. The operator may be, for example, a department in charge of a management center of an organization (such as a security company) that operates the management center, a maintenance department, or a research and development department. The contact information of the operator includes the name of the person in charge, a telephone number, an e-mail address, and the like. This storage unit 302 corresponds to the management contact information storage unit of the present invention.

  The center device 300 sets and stores an accumulation schedule for accumulating image data in units of monitoring areas. The accumulation schedule is set to arrive every hour, for example, from 0 to 30 minutes per hour.

  When a storage schedule arrives for a certain monitoring area, the storage processing unit 305 performs image data storage processing for the corresponding one or more monitoring cameras 200. The accumulation processing unit 305 transmits a list data acquisition request to the monitoring camera 200 and acquires an untransferred list from the monitoring camera 200. At this time, the total number of clusters of the monitoring camera 200 is also notified. Then, the accumulation processing unit 305 designates the cluster ID recorded in the untransferred list, and transmits an image data acquisition request to the monitoring camera 200. When image data is received from the monitoring camera 200, it is recorded in the storage / recording unit 304. The accumulation processing unit 305 acquires image data by designating in order from the cluster in which the oldest recording ID is recorded from the image data recorded in the untransferred list of image data. The process ends when all the image data recorded in the untransferred list is acquired or when the end time of the accumulation schedule is reached. When the accumulation processing unit 305 ends the accumulation process, the information of the image data that has been accumulated this time in the untransfer list is recorded in the data table.

  When the center apparatus 300 receives the remaining amount abnormality signal from the monitoring camera 200, the accumulation processing unit 305 determines that the accumulation schedule has arrived exceptionally for the monitoring camera 200, and performs the above-described image data accumulation processing. You may make it start.

  The accumulation recording unit 304 stores image data acquired from the monitoring camera 200 (image data transferred from the monitoring camera 200) and a data table which is management information of the image data. The image data recording area is divided in advance for each user or each monitoring area, and the image data of the corresponding monitoring camera 200 is recorded by the accumulation processing unit 305. The data table is information for identifying the recorded image data. The recording ID of the image data extracted from the untransferred list and the meta information (time, camera ID, shooting condition) of the image data are the images. It is recorded in association with the address information where the data is recorded.

  The accumulation delay determination unit 306, when the accumulation processing unit 305 acquires the untransferred list from the monitoring camera 200, if there is more than a predetermined amount of untransferred image data in the monitoring camera 200 (untransferred by the monitoring camera 200). If the amount of image data managed is greater than or equal to a predetermined ratio with respect to the capacity of the recording unit, it is determined that the storage delay is abnormal. Specifically, if the number of clusters whose transfer flag is OFF is equal to or greater than a predetermined ratio (for example, 40%) of the total number of clusters, it is determined that the storage delay is abnormal. This is because there is a certain number of untransferred image data in the monitoring camera 200 even though the image data is periodically transferred from the monitoring camera 200 to the center device 300 according to the accumulation schedule. This means that there is a communication problem that the transfer speed from the camera to the center apparatus 300 becomes slow, such as communication failure or low bandwidth, and image data is not transferred.

  In this case, the accumulation delay determination unit 306 compares the number of clusters managed as untransferred by the monitoring camera 200 with the total number of clusters in the image recording unit 208 when receiving the untransfer list from the monitoring camera 200. To determine the accumulation delay abnormality. As described above, the accumulation delay determination unit 306 determines an abnormality related to data communication with the monitoring camera 200. The accumulation delay determination unit 306 corresponds to the communication abnormality determination unit of the present invention. Note that the total number of clusters in the image recording unit 208 is not limited to being acquired together with the untransferred list, and may be stored for each monitoring camera 200 in the storage unit 302 of the center device 300.

  When the completion notification unit 307 receives image data from the monitoring camera 200, the completion notification unit 307 transmits an accumulation completion signal to the monitoring camera 200 as a completion notification. Specifically, when the accumulation processing unit 305 stores image data in the accumulation processing unit 305, the completion notification unit 307 transmits an accumulation completion signal for the corresponding cluster ID to the monitoring camera 200.

  When the storage delay abnormality is determined, the abnormality information transmission unit 308 transmits an e-mail as a storage abnormality notification signal for notifying the corresponding user (monitoring area manager) of the preliminary abnormality information of the present invention. In addition, when the abnormality information transmission unit 308 receives the remaining amount abnormality signal from the monitoring camera 200, the abnormality information transmission unit 308 transmits an e-mail as a remaining amount abnormality notification signal that notifies the corresponding user of the preliminary abnormality information of the present invention. Such an abnormality information transmission unit 308 may be configured as a mail transmission server.

  In addition, the abnormality information transmission unit 308 stores an e-mail transmission form for notifying the accumulation delay abnormality and the remaining amount abnormality in advance. Then, when the storage delay abnormality is determined, the abnormality information transmission unit 308 acquires the e-mail address registered as the user of the monitoring camera 200 from the user information in the storage unit 302, and enters the corresponding transmission form. A subject (Subject) defined in advance and a self-address as a sender (from) are set, and an e-mail is generated in which a user's e-mail address is set as a destination (To). Similarly, when an abnormal amount signal is sent from the monitoring camera 200, a subject and a transmission source that are defined in advance in the corresponding transmission form are set, and an e-mail in which the user's e-mail address is set as a destination is generated. . The abnormality information transmission unit 308 transmits the generated e-mail, and the accumulation in the center device 300 is not performed as expected for the user (accumulation delay abnormality), or the recording remaining amount is associated with this. It is notified that there is an abnormal state related to data communication such as a little remaining (abnormal remaining amount).

  As described above, the abnormality information transmission unit 308, when it is determined that there is an abnormality related to data communication (accumulation delay abnormality or remaining amount abnormality), is an administrator (administrator of the corresponding monitoring area) who is a user of the image management system 100. Or, the abnormality information is transmitted to the administrator of the monitoring camera 200 installed in the monitoring area. In response to this, the administrator of the monitoring area or the monitoring camera 200 secures a bandwidth such as improving the communication traffic in the monitoring area, and responds so that image data is transferred quickly and overwriting does not occur. it can.

  The browsing reception unit 309 functions as a web server that receives access from the user. The user accesses the URL of the browsing accepting unit 309 from a client device 400 such as a personal computer using a dedicated application or a web browser, and inputs identification information, thereby obtaining image data of the monitoring camera 200 corresponding to the user. You can refer to it.

  When accepting a connection from the client device 400, the browsing accepting unit 309 collates identification information such as an ID and a password received from the client device 400. If the collation is OK, the corresponding image data can be referred to from the accumulation recording unit 304. . For providing image data to the client device 400, a known method such as file transfer or streaming may be employed.

  The missing monitoring unit 310 monitors whether image data received from the monitoring camera 200 is missing. More specifically, when the accumulation processing unit 305 acquires the untransfer list from the monitoring camera 200, the missing monitoring unit 310 refers to the data table of the accumulation recording unit 304 and accumulates the corresponding monitoring camera 200. The regularity is determined between the latest recording ID (image data transferred last in the previous storage process) and the recording ID of the image data recorded in the untransferred list. The recording ID is given sequentially in the surveillance camera 200 according to a predetermined rule. The missing monitoring unit 310 determines that the recording ID is not regular (for example, not continuous) between the latest recording ID recorded in the data table and the recording ID recorded in the untransferred list. Then, it is determined that the image is missing.

  This is because, in the accumulation process that is periodically executed according to the accumulation schedule, for example, overwriting of image data after transferring the image data in the previous accumulation process until the image data is transferred in the current accumulation process. This means that the image data once captured and assigned with the recording ID has disappeared from the image recording unit 208 of the monitoring camera 200 without being stored in the center device 300 due to erasure or the like.

  Note that an exception may be provided for the image missing abnormality determination. That is, even if the record ID is not regular (for example, not continuous) between the latest record ID recorded in the data table and the record ID recorded in the untransferred list, the image is missing. There may be cases where it is not determined as abnormal.

  For example, when the monitoring camera 200 is replaced between the previous accumulation process and the current accumulation process, the latest record ID recorded in the data table and the record ID recorded in the untransferred list are However, in this case, the manufacturing number and serial number for identifying both devices are stored in advance on the camera side and stored in the cluster table or untransferred list. If this does not match, it is not determined that the image is missing.

  In addition, when the recording ID is used by circulating a sequential number, for example, when the recording ID of “0” to “255” is used by circulation (0, 1, 2,..., 255, 0, 1 2,..., Even if it is determined that the recording IDs are not continuous, if the recording ID recorded in the untransferred list is the initial value (for example, “0”), the image Not judged as missing.

  The missing abnormality processing unit 311 determines a partner to notify the abnormality information depending on whether or not an accumulation delay abnormality has been judged for the corresponding monitoring camera 200 within a predetermined time in the past when an image missing abnormality is judged. A transmission destination determination unit 312 to be determined, and a missing abnormality transmission unit 313 that notifies abnormality information by e-mail as a missing abnormality notification signal to the determined transmission destination.

  When the loss monitoring unit 310 determines that the image loss is abnormal, the transmission destination determination unit 312 determines that the storage delay abnormality or the remaining amount abnormality is determined for the corresponding monitoring camera 200 within the past predetermined time (for example, within 3 days). , Information of the missing abnormality is transmitted to the user corresponding to the monitoring camera 200.

  On the other hand, the transmission destination determination unit 312 operates the management center, not the user, if the accumulation monitoring abnormality is not determined for the corresponding monitoring camera within the past predetermined time when the loss monitoring unit 310 determines that the image is abnormal. Information on missing errors is sent to the user.

  This is because, when the image data captured by the monitoring camera 200 is lost before being stored in the center apparatus 300, the cause is that the administrator of the monitoring area or the monitoring camera 200 neglects to improve the trouble such as communication. This means that it is determined whether it is caused by a problem or a problem on the system and is notified to an appropriate transmission destination.

  For example, when notification of abnormalities relating to data communication of the monitoring camera 200 such as an accumulation delay abnormality or remaining amount abnormality is made in advance by the user, the user delays transfer of image data such as securing a communication band locally. The measures should be taken so that they are not lost. Therefore, after this, when a missing abnormality occurs in the monitoring camera 200, it is possible to notify the user that the countermeasure has been insufficient by transmitting the missing abnormality information. On the other hand, if a failure related to data communication is not detected before image data is lost in surveillance camera 200, overwriting or disappearance of data due to a failure in the system is suspected. Therefore, in such a case, it is possible to send a defect abnormality to the operator of the image management system 100 to prompt the cause investigation and countermeasure.

  The missing abnormality transmitting unit 313 transmits an e-mail as a missing abnormality notification signal for notifying the target person determined by the transmission destination determining unit 312 of the missing abnormality information. Similar to the abnormality information transmission unit 308, the missing abnormality transmission unit 313 acquires the user or operator's e-mail address from the storage unit 302 and sets it as the destination (To) of the pre-stored e-mail transmission form for monitoring. Along with the information of the camera 200, it is notified that a lack of image data has occurred. The missing abnormality transmission unit 313 may be configured as a mail transmission server, or may be configured integrally with the abnormality information transmission unit 308.

  When it is determined to transmit missing abnormality information to the management center operator, the missing abnormality transmission unit 313 receives an abnormality message from a display unit (not shown) that monitors the system state in the center device 300. May be output as a notification.

<Operation of the entire system>
Regarding the image management system 100 of the present embodiment configured as described above, the operation of the entire system will be described with reference to the sequence diagram of FIG.

  As shown in FIG. 4, in the image management system 100 of the present embodiment, when a storage schedule arrives (S401), a list data acquisition request is transmitted from the center apparatus 300 to the monitoring camera 200 (S402). Upon receiving the list data acquisition request, the monitoring camera 200 generates an untransfer list (S403), and transmits the untransfer list to the center apparatus 300 (S404). When the center device 300 receives the untransfer list (S405), it determines the accumulation delay from the amount of untransferred data (S406), and when it is determined that the accumulation delay occurs, the user (administrator) ) Is notified by mail of the storage delay abnormality (S407).

  Further, the center apparatus 300 performs processing for acquiring and storing image data (for example, image data (A), (B),...) Recorded on the untransferred list from the monitoring camera 200.

  For example, as shown in FIG. 4, when the center apparatus 300 extracts image data information from the untransferred list and transmits an acquisition request for image data (A) to the monitoring camera 200 (S408), the monitoring camera 200 In response to this acquisition request, the image data (A) is transmitted to the center apparatus 300 (S409). When the center device 300 records the image data (A) received from the monitoring camera 200 in the storage recording unit 304 (S410), the center device 300 transmits a storage completion signal of the image data (A) to the monitoring camera 200 (S411). In the monitoring camera 200, when the accumulation completion signal is received from the center apparatus 300, processing for turning on the transfer flag for the image data (A) is performed (S412).

  Similarly, when the center apparatus 300 transmits an acquisition request for image data (B) to the monitoring camera 200 (S413), the monitoring camera 200 transmits the image data (B) to the center apparatus 300 in response to the acquisition request. Transmit (S414). When the center device 300 records the image data (B) received from the monitoring camera 200 in the storage recording unit 304 (S415), the center device 300 transmits a storage completion signal of the image data (B) to the monitoring camera 200 (S416). In the monitoring camera 200, when the accumulation completion signal is received from the center device 300, processing for turning on the transfer flag for the image data (B) is performed (S417).

  Then, when all the untransferred image data is received from the monitoring camera 200, or when the untransferred image data remains, the center device 300 ends the storage process when the storage schedule ends (S418). ), The data table is updated (S419).

  In addition, the center device 300 compares the recording ID of the image data at the time of the previous accumulation with the recording ID of the image data recorded in the untransferred list for the monitoring camera 200, and determines whether the image data is missing. If there is any missing image data in a certain monitoring camera 200 (S420), it is determined whether or not there is an accumulation delay abnormality in that monitoring camera 200 during the past predetermined time (S421). When there is an accumulation delay abnormality in the monitoring camera 200, the abnormality information is transmitted to the user, and when there is no accumulation delay abnormality, the abnormality information is transmitted to the operator (S422). Although an accumulation delay abnormality is shown here as an example, the transmission destination may be varied depending on whether an abnormality relating to data communication such as a remaining amount abnormality has been detected in advance.

<Operation of surveillance camera>
Next, various processes performed by the monitoring camera 200 will be described with reference to the flowcharts of FIGS.

  FIG. 5 is a flowchart showing the flow of image data recording processing performed by the monitoring camera 200. In the monitoring camera 200, image data recording processing is performed according to a predetermined schedule (monitoring schedule). As shown in FIG. 5, when a predetermined schedule arrives (S501), the monitoring camera 200 acquires image data of the monitoring area (S502), and sequentially acquires the acquired image data for each predetermined recording unit. It is recorded in 208 (S503). After the image data is recorded, the monitoring camera 200 updates the cluster table (S504) and the recording ID table (S505). Thus, image data recording and updating of various tables are repeated during the schedule period, and when the predetermined schedule period ends (S506), the image data recording process ends.

  FIG. 6 is a flowchart showing the flow of image data transfer processing performed by the monitoring camera 200. As shown in FIG. 6, when the monitoring camera 200 receives a list data acquisition request from the center device 300 (S601), it extracts information on image data whose transfer flag is OFF from the cluster table and generates an untransferred list. (S602), the untransferred list is transmitted to the center apparatus 300 (S603).

  Thereafter, when there is an image data acquisition request from the center apparatus 300 (S604), the monitoring camera 200 transmits the image data requested by the center apparatus 300 (untransferred image data) to the center apparatus 300 (S605). When the accumulation completion signal is received from the center apparatus 300 (S606), the transfer flag of the transmitted image data is updated to ON, and the next image data acquisition request is awaited.

  The monitoring camera 200 repeats the above processing (S604 to S606) in response to an image data acquisition request from the center device 300. When there is no image data acquisition request from the center apparatus 300 and a predetermined time-out period has elapsed, or when an end signal is received from the center apparatus 300 (S607), the image data transfer process is terminated.

  FIG. 7 is a flowchart showing the flow of capacity monitoring processing performed by the monitoring camera 200. As shown in FIG. 7, in the monitoring camera 200, the number of clusters whose transfer flag is OFF is extracted (S701), and the ratio between the number of clusters whose transfer flag is OFF and the total number of clusters is calculated (S702). When the number of clusters whose transfer flag is OFF is equal to or greater than a predetermined ratio (for example, 80% or more) of the total number of clusters, that is, the number of writable clusters is equal to or smaller than a predetermined threshold (for example, 20% or less) ) (S703), it is determined that the remaining amount is abnormal (S704), and a remaining amount abnormality signal is transmitted to the center apparatus 300 (S705).

<Operation of center device>
Next, various processes performed in the center apparatus 300 will be described with reference to the flowcharts of FIGS.

  FIG. 8 is a flowchart showing a flow of image data accumulation processing performed in the center apparatus 300. In the center apparatus 300, image data accumulation processing is performed according to a predetermined schedule (accumulation schedule). As shown in FIG. 8, when the accumulation schedule arrives (S801), the center apparatus 300 transmits a list data acquisition request to the corresponding monitoring camera 200 (S802). When an untransfer list is acquired from the monitoring camera 200 (S803), a cluster ID in the untransfer list (that is, image data that has not been transferred) is designated, and image data of the monitor camera 200 is specified. An acquisition request is transmitted (S804). When the center device 300 receives image data from the monitoring camera 200 (S805), the center device 300 records the received image data in the accumulation recording unit 304 (S806), and transmits an accumulation completion signal to the monitoring camera 200 (S807). . If there is no image data information in the untransferred list (that is, there is no untransferred image data), steps S804 to S807 are skipped.

  When the center apparatus 300 has acquired all the image data in the untransferred list (S808) or when the accumulation schedule ends (S809), the center apparatus 300 ends the image data accumulation process (S810) and updates the data table (S810). S811).

  FIG. 9 is a flowchart showing the flow of the delay determination process performed in the center device 300. As shown in FIG. 9, when the center apparatus 300 acquires an untransfer list from the monitoring camera 200 (S901), the center apparatus 300 extracts the number of clusters from the untransfer list (S902). Then, the total number of clusters in the image recording unit 208 of the monitoring camera 200 is compared with the number of clusters in the untransferred list (S903), and the number of untransferred clusters is equal to or greater than a predetermined ratio of the total number of clusters (for example, 40% or more). ) (S904), it is determined that the storage delay is abnormal (S905), and a storage abnormality notification signal is transmitted to the user by e-mail or the like (S906).

  FIG. 10 is a flowchart showing the flow of the missing determination process performed in the center device 300. As shown in FIG. 10, when the center apparatus 300 acquires an untransfer list from the monitoring camera 200 (S1001), it extracts a recording ID of image data from the untransfer list (S1002). Then, the record ID of the image data accumulated last time for the surveillance camera 200 is compared with the record ID of the untransfer list (S1003), and the record ID of the image data accumulated last time and the record ID of the untransfer list are consecutive. It is determined whether or not (S1004).

  If the record ID of the previously accumulated image data and the record ID of the untransferred list are consecutive, it is determined whether or not the exception condition is met (S1005). It is determined as missing abnormality (S1006). Exception conditions include, for example, a case where it can be determined that the monitoring camera 200 has been replaced between the previous accumulation process and the current time, and a case where the maximum number that can be assigned with a recording ID has been reached and the initial value has been returned. In the case of an image missing abnormality, if it is determined that the storage camera 200 has accumulated an abnormality in the past predetermined time (S1007), a missing abnormality notification signal is transmitted to the user (S1008). On the other hand, if it is not determined that the storage delay is abnormal, a missing abnormality notification signal is transmitted to the operator (S1009). Note that the transmission destination may be varied depending on whether or not an abnormality relating to data communication such as a remaining amount abnormality is detected in advance, not limited to an accumulation delay abnormality.

  According to such an image management system 100 of the present embodiment, when image data recorded in the monitoring camera 200 is transferred to the center apparatus 300, transfer of image data due to a communication problem such as a bandwidth, for example. Can be determined not to be performed as expected.

  That is, when the image is transferred to the center at a predetermined timing while being accumulated on the camera side, it is determined that the image is not transferred as expected (accumulation delay abnormality) in the center device 300, and the monitoring camera 200 is determined. The administrator can be urged to improve the bottleneck in communication while the image recording unit 208 has a certain amount of capacity. In addition, when there is a possibility that the transfer of images exceeds a certain limit and the storage margin on the camera side is lost (abnormal remaining amount), it is possible to immediately notify the administrator.

  In the present embodiment, the monitoring camera 200 records the image data acquired by the image sensor 202 in the image recording unit 208 (SD card), and remotely at a predetermined timing (when an acquisition request is received from the center device 300). To the center device 300. At this time, if the amount of image data that has not been transmitted by the monitoring camera 200 is equal to or greater than a predetermined ratio (40% or more) of the capacity of the image recording unit 208 (SD card), the center apparatus 300 stores an accumulation delay (data transfer). Delay). In this way, it is possible to determine whether or not an accumulation delay (data transfer delay) has occurred.

  In the present embodiment, the center device 300 stores information on the monitoring camera 200 or the administrator of the monitoring area in advance, and determines that an accumulation delay (data transfer delay) has occurred. Send error information (email). Accordingly, it is possible to prevent the recording capacity of the monitoring camera 200 from being lost by notifying the administrator of the occurrence of storage delay (data transfer delay) and improving the communication state.

  In the present embodiment, monitoring camera 200 transmits abnormality information to center apparatus 300 when the volume of untransmitted image data exceeds a predetermined ratio (80% or more) of the capacity of image recording unit 208. As a result, when there is a possibility that the recording capacity of the monitoring camera 200 will run out, it is possible to immediately notify the center device 300 that the capacity of the image recording unit 208 is insufficient.

  For example, the surveillance camera 200 makes the untransmitted video data area unwritable (the unrecorded area and the storage area of the transmitted video data are writable areas), and the unwritable area of the SD card exceeds a certain percentage of the SD card capacity When it reaches 80% or more, an abnormal signal is transmitted to the center.

  In the present embodiment, the monitoring camera 200 can manage the recording area (data area) in units of blocks and determine the accumulation delay (data transfer delay) based on the number of untransmitted blocks.

  Furthermore, according to the image management system 100 of the present embodiment, when image data recorded in the monitoring camera 200 is transferred to the center apparatus 300, if there is a missing image data, the person who is responsible for it Can be addressed. In other words, when image data acquired from the monitoring camera 200 is lost, it may be due to the reason of the supervisor (user) of the monitoring area, such as the communication environment is not improved, or due to a system failure (such as a bug). It is possible to determine whether it is an object and notify it to an appropriate contact.

  In the present embodiment, the monitoring camera 200 records the image data acquired by the imaging device 200 in the image recording unit 208, and the image data includes both the image data and the untransfer list, or at least one of them. One of them is transmitted to the remote center apparatus 300 at a predetermined timing. When there is a lack of image data that the image data that should have been recorded is not recorded in the image data received from the monitoring camera 200 at a predetermined timing, the center device 300 within the past predetermined time. It is determined whether an abnormality in data communication related to the monitoring camera 200 has been detected, and missing abnormality information is transmitted to different transmission destinations according to the determination result. In this way, it is possible to send missing abnormality information to a person (appropriate transmission destination) who is responsible for the loss of image data. A person who has received the missing abnormality information can investigate the cause of the missing of the image data and take an appropriate response to the cause.

  For example, the center device 300 stores in advance information of a manager of a monitoring area (or an administrator of the monitoring camera 200 that acquires and stores image data of the monitoring area). If an abnormality in data communication related to the corresponding monitoring camera 200 has been detected within the predetermined time period in the past, and if a lack of image data is subsequently detected, the administrator (user or customer) of that monitoring area ) To send the missing abnormality information. The administrator is notified in advance of abnormalities related to data communication (preliminary abnormality information). At that time, the bandwidth is secured by improving the communication traffic in the monitoring area, and the image data is transferred promptly. The measures should be taken to prevent data overwriting. Therefore, after that, when a missing abnormality occurs in the monitoring camera 200, the administrator is informed that the previous action was insufficient by informing the administrator of the missing abnormality information, and further appropriate action is taken. Can be encouraged to take.

  Further, the center device 300 stores information on the operator of the image management system 100 in advance, and if no abnormality in data communication related to the monitoring camera 200 has been detected within the past predetermined time, the center device 300 operates the image management system 100. The missing abnormality information is sent to the user. If a defect related to data communication is not detected in the monitoring camera 200 before the image data is lost, overwriting or disappearance of the image data due to a problem on the system is suspected. Therefore, in this case, information about the missing abnormality is communicated to the system operator. In response to this, the operator can investigate the cause of the missing image and take necessary measures such as solving the problem on the system.

  In this case, the abnormality in data communication related to the monitoring camera 200 is an abnormality in data transfer delay that means that the amount of untransmitted data has exceeded a predetermined threshold. When an abnormality in the data transfer delay is detected, the administrator of the monitoring area or the monitoring camera 200 secures a bandwidth such as improving communication traffic in the monitoring area and takes measures so that the image data is transferred quickly.

  In this case, the monitoring camera 200 adds a recording ID (sequential identification index) based on a predetermined rule to the image data and records the image data in the image recording unit 208 every time recording of the image data is started (every recording event). To do. The center device 300 determines that the image data is missing when the recording ID of the image data received from the monitoring camera 200 at a predetermined timing is missing (when the recording ID is discontinuous). Can do. In this way, it is possible to appropriately determine the lack of image data.

  The embodiments of the present invention have been described above by way of example, but the scope of the present invention is not limited to these embodiments, and can be changed or modified according to the purpose within the scope of the claims. is there.

  As described above, the image management system according to the present invention has an effect that it is possible to prompt a person who is responsible for image data to be dealt with when it is missing, and is applied to a monitoring system or the like. Useful.

100 image management system 200 surveillance camera (imaging device)
201 Optical system 202 Image sensor (imaging part)
DESCRIPTION OF SYMBOLS 203 Image analog / digital converter 204 Image compression circuit 205 Communication part 206 Processing part 207 Storage part 208 Image recording part 209 Recording control part 210 1st response part 211 2nd response part 212 Transfer management part 213 Capacity monitoring part 300 Center apparatus 301 Communication Unit 302 Storage unit 303 Control unit 304 Accumulation recording unit 305 Accumulation processing unit 306 Accumulation delay determination unit 307 Completion notification unit 308 Abnormal information transmission unit 309 Browsing reception unit 310 Missing monitoring unit 311 Missing abnormality processing unit 312 Transmission destination determining unit 313 Missing abnormality Transmission unit 400 Client device

Claims (6)

An imaging device including an imaging unit that acquires image data of a monitoring area, a recording unit that records the acquired image data, and a center device including an accumulation recording unit that records image data transferred from the imaging device. An image management system comprising:
The imaging device
A transfer management unit that manages whether or not the image data recorded in the recording unit has been transferred to the center device;
A response unit that transmits information of image data managed as untransferred by the transfer management unit to the center device at a predetermined timing;
With
The center device is
A communication abnormality determination unit that determines abnormality relating to data communication with the imaging device;
A missing monitoring unit that monitors whether there is a missing image data received from the imaging device;
When the missing monitoring unit determines that there is a missing image data, the missing abnormality information is sent to different transmission destinations depending on whether or not an abnormality related to the data communication has been determined for the corresponding imaging device within the past predetermined time. A missing abnormality processing section to be transmitted;
An image management system comprising: The center device further includes:
A management contact storage unit that stores in advance the contact information of the monitoring area or the administrator of the imaging device;
An anomaly information transmitting unit for transmitting preliminary anomaly information to the relevant manager when determining an anomaly related to the data communication;
With
The missing abnormality processing unit
When the missing monitoring unit determines that the image data is missing, if the abnormality related to the data communication is determined for the corresponding imaging device within the past predetermined time, the missing abnormality information is transmitted to the corresponding administrator. The image management system according to claim 1. The center device is
In addition, an operation contact storage unit that stores in advance the contact information of the operator of the image management system,
The missing abnormality processing unit
If the missing monitoring unit determines that there is a missing image data, the missing abnormality information is transmitted to the operator if no abnormality related to the data communication is determined for the corresponding imaging device within the past predetermined time. Item 3. The image management system according to Item 1 or 2. In the center device,
The communication abnormality determination unit
4. The image management system according to claim 1, wherein when the amount of image data managed as untransferred by the imaging device is equal to or greater than a threshold, it is determined that there is an abnormality in data communication with the imaging device. The imaging device
And a recording control unit for managing the image data by assigning a new recording ID based on a predetermined rule every time recording of the image data is started,
In the center device,
The missing monitoring unit
The image according to any one of claims 1 to 4, wherein the recording IDs of a plurality of image data received from the imaging device are compared to determine that the image data is missing when the predetermined rule is not satisfied. Management system. A center device comprising an accumulation recording unit for recording image data of a monitoring area transferred from an imaging device in an image management system,
A receiving unit for receiving information of image data transmitted from the imaging device;
A communication abnormality determination unit that determines abnormality relating to data communication with the imaging device;
A missing monitoring unit that monitors whether there is a missing image data received from the imaging device;
When the missing monitoring unit determines that there is a missing image data, the missing abnormality information is sent to different transmission destinations depending on whether or not an abnormality related to the data communication has been determined for the corresponding imaging device within the past predetermined time. A missing abnormality processing section to be transmitted;
A center device comprising:

Images