| 摘要 |
A method and a system for preprocessing game video sequences comprising frames and including a ball or puck as movable game object, for transmission of the video sequences in compressed form; in an initial search (12), frames are searched for the game object on the basis of comparisons of the frames with stored game object features; then, respective frames are compared with preceding frames, to decide on the basis of differences between consecutive frames whether a scene change (14b) has occurred or not, and in the case of a scene change, an initial search is started again; otherwise, tracking of the game object (18) is carried out by determining the positions of the game object in respective frames; at least for one frame, a dominant game playfield color is detected and is replaced by a unitary replacement color so that a playfield representation essentially consists of points of the same color; and the presence, size and/or shape of the detected game object is determined, to possibly replace the game object by an enlarged replacement game object (26). |
