Patent ID: 7295218
Filing Date: 2007-11-13
Classification: H04N

Abstract:
1. A video object clipping method comprising: storing, in a storage unit, a plurality of sequential original images representing a substantially constant movement of a to-be-clipped object and a plurality of prepared reference alpha images representing a plurality of sequential reference images representing a substantially constant movement of a reference object; determining a criteria original image and a criteria reference alpha image from the original images and the reference alpha images; determining a deformation parameter by deforming the criteria reference alpha image to correspond to the criteria original image, the deformation parameter representing at least one of a parallel movement of the original object, a scaling of the original object and a rotation of the original object; deforming remaining ones of the reference alpha images according to the determined deformation parameter to generate output alpha images corresponding to the original images, wherein determining the deformation parameter includes determining the deformation parameter based on matching of the criteria original image with the criteria reference alpha image; attaching a first marking to each of the reference alpha images; attaching a second marking to the original object of the criteria original image; and performing a phase matching by finding the criteria reference alpha image and the criteria original image which are nearest in time to each other referring to the first marking and the second marking.