Method and system for estimating motion within a video sequence

H - Electricity – 04 – N

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H04N 7/36 (2006.01) G06T 7/20 (2006.01) H04N 7/26 (2006.01)

Patent

CA 2200732

The present invention provides a method and system for estimating the motion within a video sequence. The invention provides very accurate estimates of both the displacement vector field, as well as, the boundaries of moving objects. The system comprises a preprocessor (102), a spatially adaptive pixel motion estimator (104), a motion boundary estimator (106), and a motion analyzer (108). The preprocessor (102) provides a first estimate of the displacement vector field, and the spatially adaptive pixel motion estimator (104) provides a first estimate of object boundaries. The motion boundary estimator (106) and the motion analyzer (108) improve the accuracy of the first estimates.

La présente invention se rapporte à un procédé et à un système de détermination du mouvement dans une séquence vidéo. L'invention donne des valeurs très précises à la fois du champ vectoriel de déplacement et des limites d'objets mobiles. Le système comprend un préprocesseur (102), un estimateur adaptatif tridimensionnel (104) du déplacement des pixels, un estimateur de limites de déplacement (106) et un analyseur de déplacement (108). Le préprocesseur (102) donne une première estimation du champ vectoriel de déplacement, et l'estimateur adaptatif tridimensionnel (104) du déplacement de pixels donne une première estimation des limites des objets. L'estimateur de limites de déplacement (106) et l'analyseur de déplacements (108) améliore la précision des premières estimations.

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