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Interactive time-space accordant video matting method in digital video processing

A digital video and interactive technology, applied in digital video signal modification, image data processing, television, etc., can solve the problems of long processing time and discontinuous results of frame-by-frame processing

Inactive Publication Date: 2009-09-09
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to overcome the disadvantages of discontinuous results and long processing time brought by frame-by-frame processing of video in the prior art, and provide an interactive fast video matting method with consistent time and space

Method used

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  • Interactive time-space accordant video matting method in digital video processing
  • Interactive time-space accordant video matting method in digital video processing
  • Interactive time-space accordant video matting method in digital video processing

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Embodiment Construction

[0043] For the flow of the interactive, space-time consistent fast video matting method in the digital video processing of the present invention, see figure 1 , including the following steps:

[0044] The first step, interactive volume diffusion: use the interaction on the 3D video volume, the interaction of the video volume can be found in figure 2 , the 3D video volume consists of video frames in time sequence, including x-axis, y-axis and time axis Time.

[0045] 1) The user interacts on the 3D video volume. The user can rotate, slice and segment the video volume arbitrarily, and mark and divide the foreground area, background area and unknown area on the video volume with strokes of different colors. figure 2 (1) is a slice in the video body, figure 2 (2) is to mark on the slice, F in the figure is the foreground area, B is the background area, and U is the unknown area.

[0046] 2) Record the set of points in the undetermined area marked by the user as Ω e , on whi...

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Abstract

The invention discloses a video image pickup method with consistent time and space domains, of digit video process, which comprises that (1), interactive disperse that user interacts on a three-dimension video element, and obtains a shield via disperse calculation, and divides video element into foreground area, background area, and unknown area, (2), picking iterated video image that calculating out the alpha value of each point on the three-dimension video element as non-transparency, (3), foreground reconstruction with consistent time and space domains that according to the alpha value, calculating out the foreground color value with continuity at time and space domains. The inventive method can quickly, effectively, and high-quality pickup image of video, which can resolve the problems of prior video pickup method as discontinuous result and long process time, with high practicality.

Description

technical field [0001] The invention relates to an interactive time-space consistent video cutout method in digital video processing. Background technique [0002] Image matting is a digital image processing technology that separates the foreground part of the image from the background. It is widely used in the production of film and television special effects. According to the processing object, image matting can generally be divided into two categories, namely image matting and video matting. The image matting problem can be defined as: Given any picture, find the foreground color F, background color B and alpha (alpha) value α contained in the color value I of each point on the image. The alpha value refers to the opacity of the pixel, and the relationship between them is as follows: I=αF+(1-α)B. The set of alpha values ​​corresponding to the original image, that is, the alpha values ​​of all points, is called a silhouette. On video, this problem can be naturally exten...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26G06T15/20H04N19/85
Inventor 夏佳志丁子昂管宇陈为彭群生
Owner ZHEJIANG UNIV
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