Video object clipping method and apparatus
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Abstract
A video object clipping method includes storing, in a storage unit, original images each including a video object to be clipped and reference alpha images representing objects prepared, 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.
23 Citations
37 Claims
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1-25. -25. (canceled)
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26. A video object clipping method comprising:
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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; 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;
storing a background image of the criteria original image in the storage unit;
detecting a position of the original object by obtaining a difference between the background image and the criteria original image; and
performing a phase matching by finding one of the criteria reference alpha images which is nearest in time to the criteria original image based on a detection result. - View Dependent Claims (27, 28, 29, 30, 31)
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32. A video object clipping apparatus comprising:
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a storage unit configured to store 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;
a first determination unit configured to determine a criteria original image and a criteria reference alpha image from the original images and the reference alpha images;
a second determination unit configured to determine a deformation parameter by deforming the criteria reference alpha image to match the criteria original image therewith, 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;
a deformation unit configured to deform remaining ones of the reference alpha images according to the determined deformation parameter to generate output alpha images corresponding to the original images;
a second storage unit configure to store a background image of the criteria original image in the storage unit;
a detector to detect a position of the original object by obtaining a difference between the background image and the criteria original image; and
a phase matching unit configured to perform a phase matching by finding one of the criteria reference alpha images which is nearest in time to the criteria original image based on a detection result of the detector. - View Dependent Claims (33, 34, 35, 36, 37)
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Specification