Person tracking support device and person tracking support system

1. A person tracking support device comprising

a processor, wherein

the processor

acquires identification information of a tracked person identified from a face image of a person imaged by a first camera, and a first time at which the tracked person is imaged by the first camera, and also acquires a second time at which the tracked person is imaged by a second camera positioned away from the first camera,

predicts a time at which the tracked person reaches a specific area on a route positioned on the second camera's side with respect to the first camera on a basis of an elapsed time from the first time to the second time and a distance from the first camera to the second camera, and

notifies a mobile terminal device possessed by each of a plurality of observers of the identification information of the tracked person, the specific area, and the time predicted.

2. The person tracking support device according to claim 1 , wherein

the processor

further acquires a third time at which the tracked person is imaged by a third camera positioned between the second camera and the specific area,

updates the time predicted on a basis of an elapsed time from the second time to the third time and a distance from the second camera to the third camera, and

notifies the mobile terminal device of the time updated.

3. The person tracking support device according to claim 1 , wherein

there are two or more of the specific areas, and

the processor

identifies a predicted ratio at which the tracked person advances to each of the plurality of specific areas on a basis of information on a current or past flow of people to each of the specific areas,

sets a tracker to be deployed in each of the plurality of specific areas from among the observers on a basis of the predicted ratio, and

notifies the mobile terminal device of each tracker of a deployment command to the specific area set for each tracker.

4. The person tracking support device according to claim 3 , wherein

the processor

sets the tracker such that the number of the trackers deployed in another specific area having a higher predicted ratio than a certain predicted ratio is greater than that of the specific area in which the predicted ratio is the certain predicted ratio.

5. The person tracking support device according to claim 4 , wherein

the processor

acquires a type of suspicion of the tracked person, and in a case where the tracked person is identified as a violent criminal from the type of suspicion, sets the tracker such that the number of the trackers deployed in at least one of the specific area or the other specific area is greater than that in a case where the tracked person is identified as an intellectual criminal from the type of suspicion.

6. The person tracking support device according to claim 1 , wherein

the processor

acquires feature information of the tracked person, and sets a tracker to be deployed in the specific area from among the observers on a basis of the feature information, and

notifies the mobile terminal device of the tracker of a deployment command to the specific area.

7. The person tracking support device according to claim 6 , wherein

the feature information includes a type of suspicion of the tracked person, and

the processor,

in a case where the tracked person is identified as a violent criminal from the type of suspicion, sets the tracker such that the number of the trackers to be deployed in the specific area is greater than that in a case where the tracked person is identified as an intellectual criminal from the type of suspicion.

8. The person tracking support device according to claim 6 , wherein

the feature information includes a type of suspicion of the tracked person, and

the processor,

in a case where the tracked person is identified as a violent criminal from the type of suspicion, sets the tracker such that a greater number of the observers having a specific career are deployed in the specific area than that in a case where the tracked person is identified as an intellectual criminal from the type of suspicion.

9. A person tracking support system comprising:

an authentication device that identifies a tracked person from a face image of a person imaged by a first camera and acquires identification information of the tracked person and a first time at which the tracked person is imaged by the first camera, and also identifies the tracked person from a face image of a person imaged by a second camera positioned away from the first camera and acquires a second time at which the tracked person is imaged by the second camera;

a person tracking support device that acquires the identification information of the tracked person, the first time, and the second time from the authentication device; and

a mobile terminal device communicably connected to the person tracking support device and possessed by each of a plurality of observers, wherein

the person tracking support device includes a processor, and

the processor

predicts a time at which the tracked person reaches a specific area on a route positioned on the second camera's side with respect to the first camera on a basis of an elapsed time from the first time to the second time and a distance from the first camera to the second camera, and

notifies each mobile terminal device of the identification information of the tracked person, the specific area, and the time predicted.