Information processing system, information processing method, and storage medium

Patent metadata

Field	Value
Publication number	US-2016104357-A1
Application number	US-201414786945-A
Country	US
Kind code	A1
Filing date	Apr 23, 2014
Priority date	Apr 26, 2013
Publication date	Apr 14, 2016
Grant date	—

Abstract

An information processing system includes an input unit which receives inputs of videos captured by a plurality of imaging apparatuses, a detection unit which detects a moving body appearing in a first video captured by a first imaging apparatus among the plurality of imaging apparatuses and a moving body appearing in a second video captured by a second imaging apparatus among the plurality of imaging apparatuses, a first computation unit which derives, on the basis of similarity between a feature value of the moving body appearing in the first video and a feature value of the moving body appearing in the second video, a first probability indicating a probability that both moving bodies are the same, a second computation unit which derives a second probability indicating a probability that the moving body appearing in the first video does not appear in the second video on the basis of an elapsed time after the moving body exits and disappears from the first video, and a determination unit which determines whether or not the moving body appearing in the first video and the moving body appearing in the second video are the same on the basis of a comparison between the first probability and the second probability.

First claim

1 . An information processing system comprising:
an input unit which receives inputs of videos captured by a plurality of imaging apparatuses; a detection unit which detects a moving body appearing in a first video captured by a first imaging apparatus among the plurality of imaging apparatuses and a moving body appearing in a second video captured by a second imaging apparatus among the plurality of imaging apparatuses; a first computation unit which derives, on the basis of similarity between a feature value of the moving body appearing in the first video and a feature value of the moving body appearing in the second video, a first probability indicating a probability that both moving bodies are the same; a second computation unit which derives a second probability indicating a probability that the moving body appearing in the first video does not appear in the second video on the basis of an elapsed time after the moving body exits and disappears from the first video; and a determination unit which determines whether or not the moving body appearing in the first video and the moving body appearing in the second video are the same on the basis of a comparison between the first probability and the second probability.

2 . The information processing system according to claim 1 , wherein the determination unit determines that the moving body appearing in the first video and the moving body appearing in the second video are the same when the first probability is larger than the second probability.

3 . The information processing system according to claim 1 , wherein the second probability is monotonously non-increasing with respect to an elapsed time after the moving body exits and disappears from the first video.

4 . The information processing system according to claim 3 , wherein the second probability exhibits a less decreased width with respect to an elapsed time when a distance from a imaging range of the first imaging apparatus to a imaging range of the second imaging apparatus is long than when the distance from the imaging range of the first imaging apparatus to the imaging range of the second imaging apparatus is short.

5 . The information processing system according to claim 1 , the system further comprising
a display control unit which displays the second video on a display device, the display control units changing a display method, when the moving body appearing in the second video is the same as the moving body appearing in the first video, into a different display method from a display method used before the moving bodies are determined to be the same moving body.

6 . The information processing system according to claim 1 , wherein
the determination unit determines whether or not any one of a plurality of moving bodies appearing in the first video at the same time is the same as a part of moving bodies appearing in the second video, and the second computation units lowers the second probability for a moving body that is not associated with the moving body appearing in the second video among the plurality of moving bodies when there is a moving body determined to be the same as the moving body appearing in the second video among the plurality of moving bodies.

7 . An information processing method comprising:
receiving inputs of videos captured by a plurality of imaging apparatuses; detecting a moving body appearing in a first video captured by a first imaging apparatus among the plurality of imaging apparatuses and a moving body appearing in a second video captured by a second imaging apparatus among the plurality of imaging apparatuses; deriving, on the basis of similarity between a feature value of the moving body appearing in the first video and a feature value of the moving body appearing in the second video, a first probability in which both moving bodies are the same; deriving a second probability in which the moving body appearing in the first video does not appear in the second video on the basis of an elapsed time after the moving body exits and disappears from the first video; and determining whether or not the moving body appearing in the first video and the moving body appearing in the second video are the same on the basis of a comparison between the first probability and the second probability.

8 . A non-transitory computer readable storage medium recording thereon a program that causes a computer to execute:
processing for receiving inputs of videos captured by a plurality of imaging apparatuses; processing for detecting a moving body appearing in a first video captured by a first imaging apparatus among the plurality of imaging apparatuses and a moving body appearing in a second video captured by a second imaging apparatus among the plurality of imaging apparatuses; processing for deriving, on the basis of similarity between a feature value of the moving body appearing in the first video and a feature value of the moving body appearing in the second video, a first probability in which both moving bodies are the same; processing for deriving a second probability in which the moving body appearing in the first video does not appear in the second video on the basis of an elapsed time after the moving body exits and disappears from the first video; and processing for determining whether or not the moving body appearing in the first video and the moving body appearing in the second video are the same on the basis of a comparison between the first probability and the second probability.

Assignees

• Nec Corp

Inventors

• Miyano Hiroyoshi

Classifications

• G08B13/196 Primary

  using television cameras · CPC title

• G08B13/19645

  Multiple cameras, each having view on one of a plurality of scenes, e.g. multiple cameras for multi-room surveillance or for tracking an object by view hand-over · CPC title

• H04N7/181

  for receiving images from a plurality of remote sources · CPC title

• G06V20/30

  in albums, collections or shared content, e.g. social network photos or video · CPC title

• G06V20/54

  of traffic, e.g. cars on the road, trains or boats · CPC title