Gradient based motion estimation

H - Electricity – 04 – N

Patent

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Details

H04N 7/28 (2006.01) G06T 7/20 (2006.01) H04N 5/14 (2006.01) H04N 7/01 (2006.01)

Patent

CA 2248021

A technique for generating motion vectors for applications requiring field or frame rate interpolation and especially in standards conversion. The image gradients are calculated on the same standard as the input video or film signal and then vertical/temporal interpolators (20) are used to convert to the output standard before determining the motion vectors. This allows motion vectors to be easily calculated on the output standard.

L'invention a trait à une technique permettant de produire des vecteurs de mouvement aux fins d'applications exigeant une interpolation de fréquence d'images complètes ou de champ, aux fins d'une conversion de normes notamment. Les gradients d'image sont calculés à partir de la même norme que celle du signal d'entrée de vidéo ou de film et l'on utilise alors des dispositifs d'interpolation verticale/temporelle (20) pour une conversion à la norme de sortie avant de déterminer les vecteurs de mouvement, ce qui permet de calculer facilement des vecteurs de mouvement à partir de la norme de sortie.

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