×

Object tracking device, object tracking method, and object tracking program

  • US 8,891,821 B2
  • Filed: 01/13/2011
  • Issued: 11/18/2014
  • Est. Priority Date: 02/19/2010
  • Status: Expired due to Fees
First Claim
Patent Images

1. An object tracking apparatus that tracks a position of an object displayed in video using a particle filter, the position of the object being defined by an area corresponding to an image area of the object in the video and the object tracking apparatus comprising:

  • a feature calculation section that generates a plurality of particles indicating candidates for a position of the object, and calculates a feature of an image of the object and features of images of the particles;

    a likelihood calculation section that calculates, for each particle, a likelihood of that particle being a position of the object from similarity between a feature of an image of that particle and a feature of an image of the object;

    a position estimation section that estimates a position of the object based on the calculated particle likelihood;

    an overlap proportion calculation section that calculates a size of an overlap area of a particle of a second object with respect to a position of a first object; and

    a likelihood correction section that, when there is a particle for which a size of the overlap area is greater than or equal to a first predetermined value and the likelihood is greater than or equal to a second predetermined value, corrects a likelihood of a corresponding particle.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×