Patent ID: 7263207
Filing Date: 2007-08-28
Classification: G01S,G06F

Abstract:
1. A device for video tracking motions of an object, the device comprising: a calibration unit for obtaining intrinsic parameters of a video camera; a camera distortion compensation unit for receiving video data, acquired by the video camera, of a predetermined object on which at least one principal marker having a predetermined position is set and removing lens distortion from the received video data using the intrinsic parameters of the camera; a principal marker coordinate extraction unit for receiving the video data from which lens distortions are removed by the camera distortion compensation unit, and extracting two-dimensional coordinates of the video data of the principal marker set on the object, wherein the principal marker coordinate extraction unit comprises: a position, orientation and direction of motion estimation unit for estimating and outputting a position, orientation and direction of motion of the object, based on the two-dimensional coordinates input from the principal marker coordinate extraction unit, the intrinsic parameters of the camera input from the calibration unit and three-dimensional coordinates of the at least one principal marker set on the object.