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

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...

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