SUSPICIOUS PERSON DETECTION DEVICE, SUSPICIOUS PERSON DETECTION METHOD AND SUSPICIOUS PERSON DETECTION PROGRAM

• US 20120127304A1
• Filed: 12/09/2011
• Published: 05/24/2012
• Est. Priority Date: 06/11/2009
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: TSUJI, Kentaro, Segawa, Eigo, Morihara, Takashi
• Granted Patent: US 8,786,699 B2
• Time in Patent Office: Days
• US Class Current: 348/135
• CPC Class Codes: G06V 20/52 Surveillance or monitoring of activities, e.g. for recognising suspicious objects recognising microscopic objects G06V20/69
• CPC Class Codes: G08B 13/19613 Recognition of a predetermined image pattern or behaviour pattern indicating theft or intrusion
• CPC Class Codes: G08B 21/22 responsive to presence or absence of persons

Abstract

A suspicious person detection device is provided with a person detection section capable of detecting the position of persons for each of the persons, a person tracing section for continuously tracing the position of a person detected by the person detection section, and a suspicious person detection section for detecting a suspicious person according to the result of the trace of the person tracing section, wherein the person tracing section determines a person authenticated as a result of the agreement with a predetermined first condition as an authenticated person and determines a person who has agreed with a predetermined second condition associated with the authenticated person as an accompanying person at the time of the authentication, and wherein the suspicious person detection section issues a warning when the accompanying person is away from the authenticated person by a predetermined first distance or more.

Claims

1. A suspicious person detection device comprising:

a person detection unit to be capable of detecting a position of a person on a per person basis;

a person tracking unit to continuously trace the person'"'"'s position detected by said person detection unit; and

a suspicious person detection unit to detect a suspicious person on the basis of a tracking result of said person tracking unit,

wherein said person tracking unit determines, as an already-authenticated person, a person authenticated when coinciding with a predetermined first condition, and determines, as an accompanying person, a person who coincides with a predetermined second condition related to the already-authenticated person when authenticated, and

said suspicious person detection unit, when the accompanying person is distanced at a predetermined first distance or longer from the already-authenticated person, issues an alarm.

2. A suspicious person detection device according to claim 1, wherein the predetermined second condition is that the distance from the already-authenticated person when authenticated is shorter than a predetermined second distance.

3. A suspicious person detection device according to claim 2, wherein the predetermined first distance is set based on a difference in velocity vector between the accompanying person and the already-authenticated person.

4. A suspicious person detection device according to claim 2, wherein the predetermined first distance is set corresponding to a degree of secrecy of an area where the person is located.

5. A suspicious person detection device according to claim 1, wherein the already-authenticated person opens a door after being authenticated, in which case the predetermined second condition is that the accompanying person is a person who passes through the door till the door is closed since the door has been opened.

6. A suspicious person detection device according to claim 1, wherein the predetermined first condition is that a person, who unlocks a predetermined door, is determined to be the already-authenticated person.

7. A suspicious person detection method by which a computer executes:

detecting a position of a person on a per person basis; and

tracking continuously the detected position of the person; and

wherein a person authenticated by coinciding with the predetermined first condition is determined to be an already-authenticated person, while a person, who coincides with a predetermined second condition related to the already-authenticated person when authenticated is determined to be an accompanying person, and

an alarm is issued when the accompanying person is distanced at a predetermined first distance or longer from the already-authenticated person.

8. A suspicious person detection method according to claim 7, wherein the predetermined second condition is that the distance from the already-authenticated person when authenticated is shorter than a predetermined second distance.

9. A suspicious person detection method according to claim 8, wherein the predetermined first distance is set based on a difference in velocity vector between the accompanying person and the already-authenticated person.

10. A suspicious person detection method according to claim 8, wherein the predetermined first distance is set corresponding to a degree of secrecy of an area where the person is located.

11. A suspicious person detection method according to claim 7, wherein the already-authenticated person opens a door after being authenticated, in which case the predetermined second condition is that the accompanying person is a person who passes through the door till the door is closed since the door has been opened.

12. A suspicious person detection method according to claim 7, wherein the predetermined first condition is that a person, who unlocks a predetermined door, is determined to be the already-authenticated person.

13. A non-transitory computer readable storage medium storing a suspicious person detection program for making a computer execute:

detecting a position of a person on a per person basis; and

tracking continuously the detected position of the person; and

wherein a person authenticated by coinciding with the predetermined first condition is determined to be an already-authenticated person, while a person, who coincides with a predetermined second condition related to the already-authenticated person when authenticated is determined to be an accompanying person, and

an alarm is issued when the accompanying person is distanced at a predetermined first distance or longer from the already-authenticated person.