Patent ID: 6999103
Filing Date: 2006-02-14
Classification: H04N

Abstract:
1. A video object clipping method comprising: storing, in a storage unit, a plurality of sequential original images each including 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; and 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, wherein the method further includes, generating a string of the reference alpha images at a frame rate in a time axis, determining a set of the criteria original image and the criteria reference alpha image, performing a phase matching by equalizing a frame rate between a string of the sequential original images and the string of the reference alphas images, the frame rate being equalized by downsampling the string of the reference alpha images using the determined criteria alpha image, and generating the output alpha images using the string of reference alpha images having the same frame rate as that of the string of the sequential original images.