Patent · US Active

Method of tracking an object in a video stream

US8224023B2 · kind B2 · utility

4Cited by
31References
19Claims
0Family size

Assignee

Inventor

Key dates

Filing dateJul 21, 2006
Grant dateJul 17, 2012
Priority date—
Expiry dateSep 15, 2029

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG06T7/238
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

A method of tracking an object such as a face in a video stream comprises running an object detector at a plurality of locations on a first frame, defining a coarse grid. This is repeated for second and subsequent frames, with the grid slightly offset each time so that, ultimately, all of the points on a fine grid are covered but in several passes. When an object such as a face is located on one frame, positional and/or scale information is propagated to the next frame to assist in the tracking of that object onto the next frame.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.