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Video keying processing method

A processing method and keying technology, applied in TV, color TV, image communication, etc., can solve the problem of large amount of manual interaction, and achieve the effect of speeding up, fast and effective keying, and reducing the amount of interaction

Inactive Publication Date: 2009-11-25
BEIJING JIAOTONG UNIV
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AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to overcome the problem of large amount of manual interaction in the existing video matting technology, and provide a method that only needs to perform a small amount of stroke interaction in the first frame of the video, and can automatically perform matting processing on the remaining video frames Methods

Method used

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Embodiment Construction

[0053] The present invention will be further described below in conjunction with specific embodiments, as figure 1 Shown, a kind of video matting processing method its steps comprises:

[0054] Step 1. The user interacts with strokes on the first frame image to assist in segmenting the foreground object, and then optimizes the hard segmentation result by weighted kernel density estimation and image segmentation methods;

[0055] Step 2, mask automatic generation: Based on the above optimized hard segmentation, statistical methods are used to count the dispersion of high gradient pixels near the edge of the hard segmentation, and determine the radius of the brush, thereby automatically generating a suitable mask;

[0056] Step 3, image matting based on sub-images: Divide the unknown area of ​​the mask generated above into multiple small blocks, and each small block is called a sub-image, perform image matting operation in each sub-image respectively, and calculate its Opacity ...

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Abstract

The invention discloses a video keying processing method, the method comprises interactively hard dividing and optimizing, shade automatic generating, keying based on sub image and tracking and dividing prospect object, overcomes the problem that the artificial interactive amount is large in the existing video keying technology, and the invention provides a method for automatically keying processing the rest video frame, only small amount of strokes type interaction can be performed in a video first frame. Compared with the general video keying method, the method provided by the invention can rapidly and effectively key the video prospect object, the keying efficiency, the keying quality and the keying result space time consistency, especially the user interaction amount when reducing the keying, can be improved obviously.

Description

technical field [0001] The invention relates to an efficient video matting processing method in digital image and digital video processing. Background technique [0002] Video matting is an important branch of digital matting and an important technology of video editing. It is used to extract the objects of interest in the video, and synthesize the extracted objects into a new scene to obtain a video with special effects. . Video keying technology is widely used in film and television production, remote video conferencing, virtual reality, augmented reality, digital home entertainment, etc. The visual impact effect is presented to the audience. [0003] According to different processing objects, digital image keying can be divided into two categories, namely image keying and video keying, and image keying can be regarded as the basis of video keying. According to the image synthesis formula, the color value C of a point c on the image can be expressed as a convex combinat...

Claims

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Application Information

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IPC IPC(8): H04N5/272
Inventor 苗振江唐振万艳丽
Owner BEIJING JIAOTONG UNIV
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