Patent ID: 7428316

Claim:
A region data describing apparatus for describing information of a moving object region in a video sequence, the apparatus comprising: a first describing unit configured to describe time data including a start time and a duration time of the object region in the video sequence; a second describing unit configured to describe type data specifying a type of figure, corresponding to the object region, the type data also specifying a number of vertices of the figure; and a third describing unit configured to describe figure data specifying a trajectory of at least one of the vertices through at least three successive frames, the figure data including: time arrangement data including times of points used to determine the trajectory, key value data representing values of the points used to determine the trajectory, and function data for indicating the trajectory of at least one of the vertices and therefore also the trajectory of the object region, using information, the information indicating an order of a function used to determine the trajectory or that no function is defined.