Object-based motion classification

With the development of object-based video representations such as MPEG-4, object based video manipulations applications become more and more important, such as 2D video scene composition. Semi-automatic algorithms designed to perform that task use meaningful informations about the behavior of the video object in the original sequence. This article proposes a method to split the sequence in temporal segments in which the object-camera orientation is either constant or changing. Then, a key view can be extracted for each segment. This video object sequence decomposition relies on the meaning of the affine motion model parameters obtained with a robust estimation algorithm.