Method for supplementing digital image with picture element,...

H - Electricity – 04 – N

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H04N 7/32 (2006.01) G06T 9/00 (2006.01) H04N 7/26 (2006.01) H04N 7/30 (2006.01) H04N 7/50 (2006.01)

Patent

CA 2244898

A method for supplementing a digital image with picture elements, by which prediction signals having small errors can be generated for a digital image in which objects move greatly through a process which does not cause a long delay time and does not need a large quantity of calculation. In the method, the image is divided into areas. The insignificant sampled values of the areas containing the boundary of the shape of an object are transformed with a function of significant picture element values near insignificant picture element values and used to supplement the digital image. A digital image encoder and a digital image decoder both using the method are also disclosed.

La présente invention concerne un procédé servant à compléter une image numérique avec des éléments d'image, et grâce auquel des signaux de prédiction présentant de petites erreurs peuvent être produits pour une image numérique dans laquelle des objets traversent largement un processus qui ne cause pas de long retard et ne nécessite pas une grande quantité de calcul. Selon ce procédé, l'image est divisée en secteurs. Les valeurs échantillonnées non significatives des secteurs contenant la limite de la forme d'un objet sont transformées avec une fonction de valeurs d'éléments d'images significatifs proches de valeurs d'éléments non significatifs, et utilisées pour compléter l'image numérique. L'invention concerne aussi un codeur et un décodeur d'images numériques utilisant tous les deux le procédé selon l'invention.

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