JP2011239227A - Camera selecting system and camera selecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To select a camera obtaining image information showing a state of a noticed management object from a plurality of cameras arranged for monitoring the management object.SOLUTION: A camera selecting device includes: a contribution information receiving portion selecting and receiving projection information including character information including wording showing the management object in projection information distributed by an information distributing device; a position calculating portion for selecting projection information projected during a previously decided period based on time information included in projection information received by the projection information receiving portion and statistically calculating a noticed position from position information included in selected projection information; and a camera selecting portion selecting a camera arranged in a position nearest to a calculated position in a plurality of cameras and transmitting information identifying the selected camera.

Description

  The present invention relates to a camera selection system and a camera selection device.

  It is said that it is important to provide information that actually encourages residents to evacuate in order to promptly evacuate residents in areas where disasters are predicted due to the flooding of rivers during torrential rains. . Therefore, river managers (local governments, the Ministry of Land, Infrastructure, Transport and Tourism, etc.) set standard water levels such as “flooding dangerous water level” and “evacuation judgment water level” for each river, and the river water level is “flooding dangerous water level”, “evacuation level” When the “judgment water level” is reached, information that prompts evacuation behavior is transmitted to local residents.

  However, these standard water levels are determined by river managers (local governments, the Ministry of Land, Infrastructure, Transport and Tourism, etc.) based on conditions such as levee, so the “flooding dangerous water level” and “evacuation judgment water level” In many cases, local residents do not understand how dangerous it is. Therefore, only the information that “the water level has exceeded the“ evacuation judgment water level ”” may not fully convey the degree of danger to the local residents, and the local residents may not take evacuation action.

Japanese Patent Laid-Open No. 10-336631

By the way, many CCTV (Closed-circuit) for river management
Television) cameras are installed and operated by river managers (Patent Document 1). In addition, image information obtained by these cameras is provided through a network such as the Internet. Therefore, when flooding of the river is predicted, the image information obtained from the camera for river management is provided to the local residents through television or a network, and the danger level is visually communicated by the provided image information. It may be possible to encourage local residents to evacuate.

  However, since there are many cameras installed for river management, it has been difficult for river managers to select a camera that can obtain the above-described image information before a disaster occurs. In other words, it is difficult to manually select a camera that can obtain image information indicating the state of a management object that has been attracting attention from a plurality of cameras that capture management objects such as rivers. There was a problem of being.

  The present invention has been made to solve the above-described problem, and an object of the present invention is to obtain image information indicating the state of a management target that is attracting attention from a plurality of cameras installed for monitoring the management target. It is an object of the present invention to provide a camera selection system and a camera selection device that can select a camera.

  [1] In order to solve the above-described problem, the present invention provides a camera management apparatus that distributes image information obtained by a plurality of cameras that are installed at different positions and that captures a management target, character information that indicates the content of a topic, Among the post information distributed by the information distribution device and the information distribution device that distributes the post information including the position information indicating the position corresponding to the character information and the time information indicating the time when the character information was posted, A post information receiving unit that selects and receives post information including character information including a word representing the management target, and time information included in the post information among the post information received by the post information receiving unit. A position calculation unit that selects post information posted during a predetermined period based on the position information, and statistically calculates a position of interest from the position information included in the selected post information; A camera selection device comprising: a camera selection unit that selects a camera installed at a position closest to the calculated position among a plurality of cameras, and transmits information for identifying the selected camera; and the camera selection unit And a terminal device for receiving image information obtained by the camera identified by the received information from the camera management device. .

  [2] Also, in the present invention described in the above, the posting information includes an identifier for identifying a posting source that posted the posting information to the information distribution device, and the position calculation unit includes: The position attracting attention is calculated based on the latest posting information among the posting information posted from each posting source.

  [3] Also, in the present invention described above, the position calculation unit may determine the number of posted information posted during the unit period and the posted information for each unit period obtained by dividing the period. The position of interest calculated from the position information included in the information is calculated, and the number of pieces of posted information for each unit period and the position calculated for each unit period are noted in the posted information in the period. The position is statistically calculated.

  [4] Further, the present invention provides the above-described invention, wherein the camera selection device further includes an attention position display unit that displays the positions calculated by the position calculation unit in time series. And

  [5] In addition, the present invention provides a camera management device that distributes image information obtained by a plurality of cameras that are installed at different positions and images a management target, and a terminal device that receives image information distributed from the camera management device. And a camera selection device in a camera selection system comprising the camera management device and a camera selection device connected to the terminal device via a network, the character information including a word representing the management target, the character A post information receiving unit for receiving post information from an information distribution device for distributing post information including position information indicating a position corresponding to the information and time information indicating the time when the character information was posted; and the post information reception Information posted during a position calculation period determined in advance based on time information included in the posted information. The position calculation unit that calculates the position of interest from the position information included in the selected post information and the camera installed at the closest position among the plurality of cameras are selected and selected. A camera selection device including a camera selection unit that transmits information for identifying a camera.

  According to the present invention, it is possible to select a camera that can obtain image information indicating the state of a management object that is attracting attention from a plurality of cameras that are installed to monitor the management object.

It is a schematic block diagram which shows the structure of the camera selection system 100 in 1st Embodiment. It is the schematic which shows an example of the camera management information table memorize | stored in the camera management information storage part 22 in the embodiment. It is a schematic block diagram which shows the structure of the position calculation part 12 in the embodiment. It is the schematic which shows an example of the contribution position information table memorize | stored in the contribution position information storage part 123 in the embodiment. It is a schematic block diagram which shows the structure of the attention position display part 14 in the embodiment. It is the schematic which shows an example of the attention position information table memorize | stored in the attention position memory | storage part 141 in the embodiment. It is an image figure which shows an example of the image data displayed on the display part 143 in the embodiment. It is a schematic block diagram which shows the structure of the position calculation part 17 with which the camera selection apparatus in 2nd Embodiment is equipped. It is the schematic which shows an example of the intermediate information table memorize | stored in the intermediate information storage part 174 in the embodiment. It is the schematic which shows an example of the user information table memorize | stored in the user information storage part 176 in the embodiment. 7 is a flowchart illustrating intermediate information generation and update processing by an intermediate information management unit 173 and a user information management unit 175 according to the embodiment.

  Hereinafter, a camera selection system and a camera selection device according to an embodiment of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a schematic block diagram illustrating a configuration of a camera selection system 100 according to the first embodiment. As shown in the figure, the camera selection system 100 includes a camera selection device 1, a camera management device 2, an information distribution device 3, a terminal device 4, and a network 5 that connects the devices.

The camera management apparatus 2 includes a camera management unit 21, a camera management information storage unit 22, cameras 23-1, 23-2 to 23 -N, and an image distribution unit 24.
The camera management unit 21 responds to an inquiry to the cameras 23-1, 23-2,..., 23-N received through the intranet 6. The camera management information storage unit 22 stores in advance a camera management information table including camera management information corresponding to each of the cameras 23-1, 23-2,. Hereinafter, any one of the cameras 23-1, 23-2,...

  FIG. 2 is a schematic diagram illustrating an example of a camera management information table stored in the camera management information storage unit 22 according to the present embodiment. For example, the camera management information table is two-dimensional tabular data composed of rows and columns as shown in the figure. The camera management information table includes a camera ID (Identifier) for identifying the camera 23, place name information indicating the position where the camera 23 is installed, latitude information and longitude information where the camera 23 is disposed. And each item is associated with each line. Each row of the camera management information table exists for each camera 23. For example, as shown in the figure, camera ID “1”, place name information “aaa”, latitude information “LAT_Cam1”, longitude information “LON_Cam1”, and multicast address “224.xxx.xxx.xxx” The associated camera management information is stored.

  Returning to FIG. 1, the cameras 23-1, 23-2,..., 23 -N are arranged at different positions in order to monitor the river to be managed. The cameras 23-1, 23-2,..., 23-N convert captured images (still images and moving images) into a predetermined format, for example, a format such as MPEG2, and convert the converted information. The image is transmitted to the image distribution unit 24 through the intranet 6. The image distribution unit 24 distributes image data obtained by the camera 23 through the network 5 in response to an image distribution request received through the network 5.

  The information distribution device 3 has a function of distributing post information including sentences posted from an unspecified number or a specified number of users via the network 5. For example, the information distribution device 3 is a server device that operates websites such as Twitter (registered trademark), SNS (Social Networking Site), mail, blog, and chat. Post information distributed by the information distribution device 3 includes a user ID for identifying the user, character information that the user intends to disclose, position information indicating the position of the user or the position corresponding to the character information, and the character It is information including time information indicating the time when the information is posted to the information distribution device 3.

The camera selection device 1 includes a posting information reception unit 11, a position calculation unit 12, a camera selection unit 13, and an attention position display unit 14.
The posted information receiving unit 11 selects and receives posted information including a remark about the river from the posted information distributed by the information distributing apparatus 3. For example, a case where the information distribution apparatus 3 provides a Twitter (registered trademark) service will be described.

In the posted information, the topic that has become a hot topic is expressed as “#topic”. Specifically, post information including character information having a character string (word) “#Kasen” is post information including a topic about a river. In this case, the posting information receiving unit 11 selects and receives posting information including “#Kasen” from the posting information distributed from the information distribution device 3.
In the posted information, the information indicating the position is expressed as “L: position”. The “position” may be information indicating latitude and longitude, or may be information indicating a landmark.
When the information distribution device 3 provides a service for publishing a blog or the like, the posted information receiving unit 11 includes a word indicating a river or a river, for example, a character string such as “river” or “Tama River”. Post information may be selected and received.

  The position calculation unit 12 selects post information posted within the most recent predetermined period from the post information received by the post information reception unit 11, and based on the position information included in the selected post information. Thus, attention position information indicating a position that is currently focused on among the users who have made statements (posts) on the river is statistically calculated. As the latest period, for example, the latest 30 minutes or the latest 60 minutes is set. The attention position information includes time information indicating the time when the attention position information is calculated, attention latitude information indicating attention latitude and longitude, and attention longitude information.

The camera selection unit 13 inquires of the camera management unit 21 provided in the camera management device 2 about the camera 23 closest to the position indicated by the target position information calculated by the position calculation unit 12. The camera selection unit 13 receives camera management information corresponding to the camera 23 corresponding to the inquiry received from the camera management unit 21, and transmits the received camera management information to the terminal device 4.
The camera selection unit 13 reads and stores the camera management information table stored in the camera management information storage unit 22 in advance, and is closest to the position that is currently focused without inquiring of the camera management device 2. The camera 23 may be selected and camera management information corresponding to the selected camera 23 may be transmitted to the terminal device 4.

  The terminal device 4 is installed in a local government, a broadcasting station, or the like. The terminal device 4 is located at the most noticeable position by the multicast address included in the camera management information received from the camera selection unit 13 provided in the camera selection device 1. The camera management apparatus 2 is requested to distribute image information obtained by the near camera 23. Then, the local government or broadcasting station broadcasts the local residents together with the obtained image information to encourage local residents to evacuate.

FIG. 3 is a schematic block diagram illustrating the configuration of the position calculation unit 12 in the present embodiment.
As shown in the figure, the position calculation unit 12 includes a latitude / longitude storage unit 121, a posting information management unit 122, a posting position information storage unit 123, and a latitude / longitude calculation unit 124.

In the latitude / longitude storage unit 121, latitude / longitude information corresponding to the landmark is stored in advance. The landmarks associated with the latitude and longitude information are, for example, bridges, sluices, main trunk roads (highways, national roads, prefectural roads, etc.), buildings around rivers, and the like.
The posted information management unit 122 generates posted position information from the posted information received by the posted information receiving unit 11, and stores the generated posted position information in the posted position information storage unit 123. Here, the posting position information is information including a user ID included in the posting information, time information included in the posting information, and latitude / longitude information indicating latitude and longitude included as information indicating a position in the posting information. It is.

  When the position information included in the posted information indicates a landmark, the posted information management unit 122 reads out the latitude / longitude information corresponding to the landmark included in the posted information from the latitude / longitude storage unit 121 and reads it out. The posted position information including the latitude / longitude information is stored in the posted position information storage unit 123. Also, the posting information management unit 122 deletes the posting position information that has passed a predetermined period from the posting position information storage unit 123. In other words, the posting position information storage unit 123 stores only posting position information based on posting information posted from the present to a predetermined period in the past.

The posting position information storage unit 123 stores a posting position information table including posting position information based on the posting information received from the information distribution device 3.
FIG. 4 is a schematic diagram illustrating an example of a posting position information table stored in the posting position information storage unit 123 according to the present embodiment. For example, the posting position information table is two-dimensional tabular data composed of rows and columns as shown in the figure. The posting position information table has items of time information, user ID, and latitude / longitude information, and each item is associated with each row.

Further, each row of the posting position information table exists for each posting information received by the posting information receiving unit 11. For example, in the posting position information table, as shown in the figure, the time information “YYYY MM DD HH: MM”, the user ID “Mr. A”, and the latitude and longitude information “East longitude Xa degrees Ya minutes Za seconds North latitude xa degrees ya minutes
Post position information in association with “za seconds” is stored. The posting position information table is sorted using the user ID as a key.

Returning to FIG. 3, the latitude / longitude calculation unit 124 reads out latitude / longitude information of the posting position information stored in the posting position information storage unit 123 at predetermined intervals, and calculates an average value of the latitude and longitude. . At this time, if there is post position information with a duplicated user ID, the latitude / longitude calculation unit 124 uses only the post position information with the latest time information among the post position information including the user ID. The average value is calculated.
In addition, the latitude / longitude calculation unit 124 selects camera position information including time information indicating the time when the average value is calculated, attention latitude information indicating the average value of latitude, and attention latitude information indicating the average value of longitude. To the unit 13 and the target position display unit 14.

FIG. 5 is a schematic block diagram showing the configuration of the target position display unit 14 in the present embodiment.
As shown in the figure, the target position display unit 14 includes a target position storage unit 141, a display data generation unit 142, and a display unit 143.
In the attention position storage unit 141, attention position information including attention latitude information and attention longitude information input from the position calculation unit 12 is periodically recorded.

  FIG. 6 is a schematic diagram illustrating an example of an attention position information table stored in the attention position storage unit 141 according to the present embodiment. As shown in the figure, the target position information table is two-dimensional tabular data composed of columns and rows. The attention position information table has items of time information indicating the time when attention position information was recorded, attention latitude information, and attention longitude information, and each item is associated with each line. The attention position information table exists for each time when attention position information is calculated. For example, as shown in the figure, attention position information in which time information “2009/12/13 08:00”, attention latitude information “LAT_1”, and attention longitude information “LON_1” are associated is stored. Yes.

Returning to FIG. 5, image information for changing the change in the attention position information stored in the display data generation section 142 and the attention position storage section 141 in time series is generated. For example, a map of the corresponding area may be superimposed on this image information.
The display unit 143 displays the image information generated by the display data generation unit 142. The display unit 143 is configured by a device such as a liquid crystal display or a printer, for example.
FIG. 7 is an image diagram showing an example of image data displayed on the display unit 143 in the present embodiment. As shown in the figure, the time-series change of the position of interest is displayed in the order of time as an animation, with “▲” mark, the time when the position is calculated, and the straight line connecting the “▲” marks.
Thereby, it is possible to predict in which direction the position being noticed is moving.

As described above, the camera selection device 1 calculates an average value of information (latitude / longitude) indicating a position included in the posted information received from the information distribution device 3. At this time, by limiting the posted information to the information posted in the most recent period, the currently focused position is calculated in the posted information regarding the posted river.
Then, the camera selection device 1 selects the camera 23 closest to the calculated position, and information that identifies the selected camera 23 is a terminal provided in a local government or land transporter who is a river manager, or a broadcasting station. Transmit to device 4.
Thereby, the river manager can obtain the camera management information corresponding to the camera 23 closest to the position of interest in the river at the time of torrential rain. Optimal image information can be obtained. Then, the local government or broadcasting station calls the evacuation action and communicates the image information obtained by the selected camera 23 to the local residents, so that the degree of danger can be visually transmitted to the local residents. Can be encouraged.

  Further, as described above, since the camera selection device 1 performs processing, the camera 23 can be selected without human intervention, so that the time for selecting optimal image information can be shortened. As a result, the image information can be provided to the local residents before the disaster occurs, and the local residents can be urged to evacuate in advance.

(Second Embodiment)
The camera selection device provided in the camera selection system according to the second embodiment is different from the camera selection device 1 according to the first embodiment in the configuration of the position calculation unit 12. Therefore, different configurations will be described, and other configurations will be described. Is omitted.

  FIG. 8 is a schematic block diagram illustrating a configuration of the position calculation unit 17 provided in the camera selection device according to the second embodiment. As illustrated, the position calculation unit 17 includes a latitude / longitude storage unit 121, a posted information conversion unit 172, an intermediate information management unit 173, an intermediate information storage unit 174, a user information management unit 175, a user information storage unit 176, and a latitude / longitude. A calculation unit 177 is provided. Since the latitude / longitude storage unit 121 has the same configuration as that of the first embodiment, the description thereof is omitted.

  The posting information conversion unit 172 generates posting position information from the posting information received by the posting information receiving unit 11 as in the posting information management unit 122 of the first embodiment. Also, the posting information conversion unit 172 corresponds to the landmark included in the posting information when the position information included in the posting information indicates a landmark, as in the posting information management unit 122 of the first embodiment. Replace with latitude / longitude information.

Further, the posted information conversion unit 172 converts the latitude / longitude information into latitude information and longitude information as follows, and converts the posted position information including the converted latitude information and longitude information into the intermediate information management unit 173 and the user information management unit 175. Output to.
Here, a case where the accuracy of latitude / longitude information is 1/1000 second will be described. When the latitude / longitude information is “latitude AAA degree BB minute CC. DDD second, longitude JJ degree KK minute LL. MMM second”, the latitude information is “AAA × 60 × 60 × 1000 + BB × 60 × 1000 + CC × 1000 + DDD”. Calculated. The longitude information is calculated by “JJJ × 60 × 60 × 1000 + KK × 60 × 1000 + LL1000 + MMM”.
Thereby, the average value of latitude information and longitude information can be calculated by addition and division without conversion of units, and the time required for calculation can be shortened.

  The intermediate information management unit 173 generates intermediate information based on the posting position information input from the posting information conversion unit 172 and the user information stored in the user information storage unit 176, and the generated intermediate information is intermediated. The information is stored in the information storage unit 174. At this time, the intermediate information management unit 173 generates the latest posting position information of each user when generating the intermediate information. In other words, the intermediate information management unit 173 prevents a plurality of post position information based on posts from the same user from being reflected in the intermediate information. As a result, the intermediate information management unit 173 can remove the influence of repeated postings by the same user.

The above-described intermediate information is information generated for each unit period obtained by dividing a predetermined period. For example, when the predetermined period is the latest 30 minutes, the unit period is set to 1 minute.
The intermediate information includes start time information indicating the start time of the unit period, the number of comments that is the number of posted information posted in the unit period, latitude information corresponding to the posted information posted in the unit period, and Average latitude information and average longitude information, which are average values of longitude information, are included. Further, the intermediate information table stored in the intermediate information storage unit 174 includes intermediate information of each unit period corresponding to a predetermined period.

  For example, when the predetermined period is the latest 30 minutes and the unit period is 1 minute, the intermediate information management unit 173 stores 30 pieces of intermediate information included in the latest 30 minutes in the intermediate information storage unit 174. The intermediate information that has passed a predetermined period is deleted so as to keep the status. Specifically, at time 10:30, when the intermediate information storage unit 174 stores intermediate information every minute from time 10:01 to time 10:30, the intermediate information management unit 173 When the time reaches 10:31, the oldest intermediate information at time 10:01 is deleted, and the intermediate information at time 10:31 is added.

The intermediate information storage unit 174 stores an intermediate information table including intermediate information.
FIG. 9 is a schematic diagram illustrating an example of an intermediate information table stored in the intermediate information storage unit 174 according to the present embodiment. For example, the intermediate information table is two-dimensional tabular data composed of columns and rows as shown in the figure. Further, the intermediate information table has items of start time information of unit period, number of utterances, average latitude information, and average longitude information, and each item is associated with each line. Each row of the intermediate information table exists for each unit period in a predetermined period.
In the intermediate information table, for example, as shown in the figure, the start time “2009/12/14 10:01”, the number of utterances “N1”, the average latitude information “LAT_ave1”, and the average longitude information “LON_ave1” Intermediate information that is associated with is included.

  Returning to FIG. 8, the user information management unit 175 generates user information from the posting position information input from the posting information conversion unit 172, and stores the generated user information in the user information storage unit 176. In addition, the user information management unit 175 updates the user information so that the user information storage unit 176 stores the latest user information including the user ID of each user.

  The user information storage unit 176 stores a user information table including user information. FIG. 10 is a schematic diagram illustrating an example of a user information table stored in the user information storage unit 176 according to the present embodiment. For example, as shown in the figure, the user information table is two-dimensional tabular data composed of rows and columns. Further, the user information table has items of user ID, time information, longitude information, and latitude information, and each item is associated with each row. Each row of the user information table exists for each user stored in the posting position information storage unit 123. For example, the user information table includes a user ID “Mr. B”, time information “2009/12/14 10:02”, longitude information “LAT_b”, latitude information “LON_b”, as shown in FIG. Is associated with the user information.

  Referring back to FIG. 8 again, the latitude / longitude calculation unit 177 calculates the average values of the average latitude information and the average longitude information of the intermediate information included in the predetermined period among the intermediate information stored in the intermediate information storage unit 174. The camera selection unit 13 and the target position display unit 14 are calculated. The calculated average value is attention latitude information and attention longitude information indicating a position that is currently being noted.

FIG. 11 is a flowchart showing intermediate information generation and update processing by the intermediate information management unit 173 and the user information management unit 175 in the present embodiment.
First, when new posting position information is input by the posting information conversion unit 172 (step S201), the intermediate information management unit 173 includes user information including a user ID that matches the user ID included in the input posting position information. Is stored in the user information storage unit 176 (step S203), and it is determined whether the user corresponding to the user ID has posted in the past.

When the user ID that matches the user ID included in the input posting position information is not stored in the user information storage unit 176 (step S203: No), the intermediate information management unit 173 is included in the input posting position information. The intermediate information having time information that matches the time information to be read is read from the intermediate information storage unit 174 (step S205).
When the latitude information included in the input posted position information is LATr, the longitude information is LONr, the number of messages included in the read intermediate information is Nn, the average latitude information is LATn, and the average longitude information is LONn, the intermediate information management unit 173 updates intermediate information by “intermediate information update processing 1” according to the following equations (1) to (3), and overwrites the updated intermediate information with the read intermediate information and stores it in the intermediate information storage unit 174 ( Step S207).

[Intermediate information update process 1]
(Number of utterances after update) = Nn + 1 (1)
(Updated average latitude information) = (LATn × Nn + LATr) / (Nn + 1) (2)
(Average longitude information after update) = (LONn × Nn + LONr) / (Nn + 1) (3)

  When the update of the intermediate information by the intermediate information management unit 173 is completed, the user information management unit 175 converts the input posting position information into the user information format and stores it in the user information storage unit 176 (step S209). At this time, when user information that matches the user ID of the user information to be newly stored is stored in the user information storage unit 176, the user information management unit 175 overwrites the stored user information with the user information. The data is stored in the storage unit 176. That is, the user information management unit 175 stores the user information in the user information storage unit 176 so that the user IDs do not overlap.

  As described above, by storing the intermediate information for each unit period in the intermediate information storage unit 174, the latitude / longitude calculation unit 177 calculates the average from the average latitude information and the average longitude information of each unit period included in the predetermined period. By calculating the value periodically at a predetermined interval, attention latitude information and attention longitude information indicating a position of interest are calculated.

  Specifically, when each unit period (i = 1,..., N), the number of utterances N (i) in each unit period, the average latitude information is LAT (i), and the average longitude information is LON (i), The attention latitude information and the attention longitude information are calculated by the equations (4) and (5).

(Attention latitude information) = Σ (N (i) × LAT (i)) / ΣN (i) (4)
(Attention longitude information) = Σ (N (i) × LON (i)) / ΣN (i) (5)

  If it is determined in step S203 that the user ID that matches the user ID included in the input posting position information is stored in the user information storage unit 176 (step S203: Yes), the intermediate information management unit 173 is stored. User information is read (step S211), and intermediate information that matches the time information included in the read user information is read (step S213).

  When the latitude information included in the read user information is LATs, the longitude information is LONs, the number of messages included in the read intermediate information is Nn, the average latitude information is LATn, and the average longitude information is LONn, the intermediate information management unit 173 Then, the intermediate information is updated by “intermediate information update processing 2” according to the following equations (6) to (8), and the updated intermediate information is overwritten on the read intermediate information and stored in the intermediate information storage unit 174 (step S215). ).

[Intermediate information update process 2]
(Number of utterances after update) = Nn-1 (6)
(Updated average latitude information) = (LATn × Nn−LATs) / (Nn−1) (7)
(Average longitude information after update) = (LONn × Nn−LONs) / (Nn−1) (8)

That is, the intermediate information management unit 173 obtains the data of the user from the intermediate information based on the post made by the user with the user ID included in the input post position information by the “intermediate information update process 2”. delete.
The intermediate information management unit 173 and the user information management unit 175 execute the processes of steps S205 to S209 described above after step S215.

In the present embodiment, as described above, by calculating the intermediate information for each unit time and storing the intermediate information in the intermediate information storage unit 174, the latitude / longitude calculation unit 177 allows each intermediate information included in the predetermined period to be stored. The position information of interest can be calculated by calculating the average value of the average latitude information and the average longitude information included in each of the read intermediate information.
Since attention position information can be calculated by such simple four arithmetic operations, the time required for selecting the camera 23 can be shortened, and attention is now focused on the terminal device 4 provided in the local government or broadcasting station. The information regarding the camera 23 that captures the situation of the current position can be transmitted more quickly.

  As a result, the local government or broadcasting station evacuates more quickly by the local residents by transmitting the image information obtained by the camera 23 selected by the camera selection device 1 and information prompting the evacuation action to the local residents. Can encourage action.

In each of the above-described embodiments, the configuration has been described in which the camera selection unit 13 selects the camera 23 that is closest to the position of interest that is indicated by the attention position information. However, the present invention is not limited to this, and when the distance between the currently focused position and the camera 23 closest to the position is equal to or greater than a predetermined distance, the camera selection unit 13 does not select the camera 23. May be.
In addition, the camera selection unit 13 selects one camera 23, but may select a plurality of cameras 23 installed at a position closer than a predetermined distance from the currently focused position. Good.

  Further, a firewall or the like may be provided between the network 5 and the intranet 6.

  Further, in each of the above-described embodiments, a region for calculating the position of interest is determined in advance, and the target latitude information and the target longitude information are calculated only from the posted information regarding the latitude and longitude ranges corresponding to the region. It may be. Thereby, the posting information regarding the position away from the target area can be removed, and the accuracy of the attention position information can be improved.

Further, in each of the above-described embodiments, the configuration in which the camera selection device 1 and the camera management device 2 are different devices has been described, but a configuration in which the two devices are integrated may be employed.
Further, in each of the above-described embodiments, the terminal device 4 has been described as being installed in a local government or a broadcasting station, but local residents have the terminal device 4 and have been selected from the camera selection device 1. Camera management information corresponding to the camera 23 may be received. Thereby, since image information can be transmitted directly to the local residents, evacuation action can be promptly promoted.

Further, in each of the above-described embodiments, the configuration in which the average value of latitude and longitude is calculated in the position calculation unit 12 is described. However, the present invention is not limited to this, and weighting is performed according to the median value or the passage of time. The average or the like may be calculated statistically.
Moreover, in each of the above-described embodiments, the configuration in which the posting source of the posting information is identified by the user ID that identifies the user who posted the posting information has been described. You may make it use ID of the terminal device which identifies a terminal device, for example, a mobile telephone, a portable information device, etc.

  Further, in each of the above-described embodiments, the configuration in which the latitude / longitude information for each user ID is handled in the posting position information table has been described. However, the present invention is not limited to this, and the kilometer post information of the river closest to the latitude / longitude information is the attention position information. May be selected, and the camera installed closest to the kilometer post may be selected. In the case of such a method, the camera management information table also needs kilopost information of the river where the camera is installed.

  The camera selection device 1 described above may have a computer system inside. In that case, the processing steps executed by the post information receiving unit 11, the position calculating unit 12 (17), the camera selecting unit 13, and the target position displaying unit 14 described above are stored in a computer-readable recording medium in the form of a program. The above processing is performed by the computer reading and executing this program. Here, the computer-readable recording medium means a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Alternatively, the computer program may be distributed to the computer via a communication line, and the computer that has received the distribution may execute the program.

  Based on information posted by a general user, a system that calculates a position of interest and transmits image information of the calculated position, for example, a management target is a road, and traffic congestion on the road is image information It can be applied to a system that communicates by

DESCRIPTION OF SYMBOLS 1 ... Camera selection apparatus 2 ... Camera management apparatus 3 ... Information distribution apparatus 4 ... Terminal apparatus 5 ... Network 6 ... Intranet 11 ... Posting information receiving part 12, 17 ... Position calculation part 13 ... Camera selection part 14 ... Attention position display part 21 ... Camera management unit 22 ... Camera management information storage unit 23, 23-1, 23-2, 23-n ... Camera 24 ... Image distribution unit 121 ... Latitude / longitude storage unit 122 ... Posting information management unit 123 ... Posting position information storage unit 124, 177 ... latitude / longitude calculation unit 141 ... attention position storage unit 142 ... display data generation unit 143 ... display unit 172 ... post information conversion unit 173 ... intermediate information management unit 174 ... intermediate information storage unit 175 ... user information management unit 176 ... User information storage

Claims (5)

A camera management device that distributes image information obtained by a plurality of cameras that are installed at different positions and captures a management target; and
An information distribution device for distributing post information including character information indicating the content of the topic, position information indicating a position corresponding to the character information, and time information indicating a time when the character information was posted;
A post information receiving unit that selects and receives post information including character information including a word representing the management target from post information distributed by the information distribution device, and a post received by the post information receiving unit Of the information, select the posted information posted during a predetermined period based on the time information included in the posted information, and the position that is attracting attention from the positional information included in the selected posted information A position calculation unit that statistically calculates a camera, and a camera selection unit that selects a camera installed at a position closest to the calculated position among the plurality of cameras and transmits information for identifying the selected camera. A camera selection device,
A terminal device that receives information for identifying the camera selected by the camera selection unit and receives image information obtained by the camera identified by the received information from the camera management device. Selection system. The posting information includes an identifier for identifying a posting source that posted the posting information to the information distribution device,
The camera selection system according to claim 1, wherein the position calculation unit calculates a position attracting attention based on the latest posting information among pieces of posting information posted from respective posting sources. The position calculation unit
For each unit period obtained by dividing the period, the number of posted information posted during the unit period and the position of interest calculated from the position information included in the posted information are calculated, and the unit 3. The position that is noticed in the posted information in the period is statistically calculated from the number of posted information for each period and the position calculated for each unit period. The camera selection system described in Crab. The camera selection device further includes:
The camera selection system according to any one of claims 1 to 3, further comprising: a target position display unit that displays the position calculated by the position calculation unit in time series. A camera management apparatus that distributes image information obtained by a plurality of cameras that are installed at different positions and captures a management target, a terminal apparatus that receives image information distributed from the camera management apparatus, the camera management apparatus, and the terminal A camera selection device in a camera selection system comprising a camera selection device connected to the device via a network,
The posting information from the information distribution device that distributes the character information including the word representing the management target, the position information indicating the position corresponding to the character information, and the posting information including the time information indicating the time when the character information was posted. A post information receiving unit for receiving
Among the posted information received by the posted information receiving unit, select posted information posted during a position calculation period determined in advance based on time information included in the posted information, and select the selected posted information. A position calculation unit that calculates a position of interest from the included position information;
A camera selection device comprising: a camera selection unit that selects a camera installed closest to the plurality of cameras and transmits information for identifying the selected camera.