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Method for encoding depth image of three-dimensional television system

A technology of depth image and stereoscopic TV, applied in the coding field of depth image, can solve the problem of ineffective protection of edge information of depth image, and achieve the effect of reducing code stream, improving quality and improving compression ratio.

Inactive Publication Date: 2008-12-24
ZHEJIANG UNIV
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, the current stereoscopic TV system directly adopts general-purpose video coding technology to compress the depth image, which cannot effectively protect the edge information of the depth image.

Method used

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  • Method for encoding depth image of three-dimensional television system
  • Method for encoding depth image of three-dimensional television system
  • Method for encoding depth image of three-dimensional television system

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Embodiment Construction

[0044] figure 1 A schematic diagram of the structure of the present invention is given. The object of the present invention is to provide a method for encoding depth images in a stereoscopic television system. It includes the following steps:

[0045] Step 1, calculate the edge intensity value of each pixel in the depth image, then calculate the edge intensity value of each macroblock according to the edge intensity value of the pixel point;

[0046] a) For each pixel in the depth image, select nine relative brightness values ​​in the 3×3 neighborhood according to the following formula:

[0047] Z 1 =p(clipX(x-1), clipY(y-1)); Z 2 =p(clipX(x), clipY(y-1));

[0048] Z 3 =p(clipX(x+1), clipY(y-1)); Z 4 =p(clipX(x-1), clipY(y));

[0049] Z 5 =p(clipX(x), clipY(y)); Z 6 =p(clipX(x+1), clipY(y));

[0050] Z 7 =p(clipX(x-1), clipY(y+1)); Z 8 =p(clipX(x), clipY(y+1));

[0051] Z 9 =p(clipX(x+1), clipY(y+1));

[0052] clipX(x)=min(Width-1, max(0,x)); clipY(y)=min(Hight-1...

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Abstract

The invention discloses a method for encoding a range image in a stereo-television system. The method comprises the following steps: 1) the edge strength value of each pixel in the range image is calculated, and then the edge strength value of each macroblock is calculated based on the edge strength value of the pixel point; 2) all the macroblocks in the range image are divided into three types, i.e., strong edge macroblocks, medium edge macroblocks and weak edge macroblocks; 3) the lower quantification parameter is configured for the strong edge macroblocks, the medium quantification parameter is configured for the middling edge macroblocks and the higher quantification parameter is configured for the weak edge macroblocks; and 4) the range image is encoded by utilizing the video coding technique based on the quantification parameter configured for all the macroblocks in the range image. The lower quantification parameter is configured for the strong edge macroblocks, so that the edge information of the range image is effectively protected and the quality of the free viewport image description of the client is improved.

Description

technical field [0001] The present invention relates to digital image processing technology, in particular, to a method for encoding depth images in a stereoscopic television system Background technique [0002] With the rapid development and wide application of digital video technology, people have higher and higher requirements for video quality and form. Traditional two-dimensional flat video can no longer meet people's needs for real and natural reproduction of scenes, so it can provide stereoscopic Stereoscopic / multi-viewpoint video technology with interactive operation functions has attracted more and more attention from the industry. Compared with monocular video, stereoscopic / multi-viewpoint video has increased scene depth information representation, and has broad application prospects in fields such as stereoscopic TV, free-viewpoint TV, visual conferencing with a sense of presence, and virtual reality (see Hou Chunping, Yang Lei, Song Xiaowei, Dai Jufeng. A Review...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N13/00H04N7/26G06T7/00H04N19/597
Inventor 许士芳雷杰刘济林
Owner ZHEJIANG UNIV
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