Patent ID: 7146022
Filing Date: 2006-12-05
Classification: G06T

Abstract:
1. A spatiotemporal locator processing method of correcting a spatiotemporal locator capable of specifying trajectories of representative points of an approximate figure representing an arbitrary object in order to represent a transition of the object in video data over a plurality of frames, the spatiotemporal locator being defined for each object and including (1) identification information of the object, (2) an object appearing time representing a time at which the object appears, (3) an object disappearing time representing a time at which the object disappears, (4) a shape flag representing a shape of the approximate figure, and (5) trajectory data representing the trajectories of the representative points, the trajectory data for each representative point including a number of knots of a function approximating the trajectory of the representative point, a first knot appearing time representing a time of a first knot of the function, and polynomial data representing parts of a function between two knots, each polynomial data including a knot time representing an end knot time, a polynomial order representing an order of the parts of the function, and polynomial coefficient data representing coefficients of a polynomial representing the function, the method comprising: obtaining the trajectory of the representative point based on the spatiotemporal locator; displaying, on a screen, the obtained trajectory of the representative point with the knots and a control point located on the trajectory between two knots, the control point uniquely specifying the trajectory with two knots, wherein movement of the control point affects the trajectory of the representative point only between the two knots between which the control point is located; receiving input of a correction instruction for the trajectory displayed on the screen, the correction including a movement of the control point in time and space; and correcting the spatiotemporal locator based on the correction instruction.