A block-based motion estimator capable of handling occlusions
Mark J. W. Mertens, Gerard de Haan · TU/e Research Portal · 2000
We present a new block-based motion estimation strategy, which aims at correctly nding the veloc-ity of picture blocks, even for background blocks in occlusion areas. This tritemporal ME calculates the motion between two pictures, switching the ME reference plane dependent on an occlusion detector. We also introduce a retimer, which can transform, locally in the picture, motion vectors valid for one time instant to another time instant. The retimer uses a foreground/background detector, of which we describe three varieties. Occlusion is a problem that plagues all block based motion estimation methods, and hence we see a utility of our method for ap-plications like e.g. picture rate conversion, video compression, 3D matching or image sequence object extraction. An evaluation of the tritemporal estima-tor is included. 1