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Multi-stage area-of-interest-based multi-view video coding method

A region-of-interest and multi-view video technology, applied in the field of multi-view video coding based on multi-level regions of interest, can solve the problems of poor video coding quality, inaccurate ROI, low coding efficiency, etc., and achieve overall quality reduction and improvement Smoothness, the effect of improving coding efficiency

Active Publication Date: 2013-06-26
TIANJIN UNIV
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Problems solved by technology

[0007] The above method achieves good results when applied to a video scene with a simple background and a single object; when applied to a complex video scene, the extracted ROI is inaccurate, which leads to poor video coding quality and low overall coding efficiency

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Embodiment Construction

[0038] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0039] In order to improve the efficiency and quality of video coding, the embodiment of the present invention provides a multi-viewpoint video coding method based on multi-level regions of interest, which effectively divides multi-viewpoint video into multi-level ROIs, and then provides a segmentation method based on multi-level ROIs As a result, the quantization parameter adjustment is carried out to realize the strategy of optimizing the allocation of coding bits, see Figure 4 , see the description below:

[0040] 101: Perform macroblock-based depth saliency calculation on the depth map to obtain the depth saliency value S MB ;

[0041] The depth map is an 8-bit grayscale image captured by a depth camera or calculated by stereo m...

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Abstract

The invention discloses a multi-stage area-of-interest-based multi-view video coding method which comprises the following steps of: carrying out macro block-based depth saliency computation on a depth map to obtain a depth saliency value SMB; computing a partition threshold value based on the depth saliency value SMB and the partition standard of multi-stage area-of-interest; partitioning the multi-view video through the partition threshold value to obtain a plurality of video regions with different interesting levels; and adjusting quantization parameters QP according to the interesting levels SL, and coding the plurality of video regions according to the adjusted quantization parameters to obtain a rebuilt video. After the multi-stage area-of-interest-based multi-view video coding method is adopted, on the premise that the whole quality of the rebuilt video is guaranteed, the code rate can be reduced, and the coding efficiency of the multi-view video can be improved.

Description

technical field [0001] The invention relates to the field of multi-viewpoint video coding, in particular to a multi-viewpoint video coding method based on multi-level regions of interest. Background technique [0002] With the rapid rise and rapid development of 3D technology, multi-viewpoint video has attracted more and more attention due to its vivid and rich visual experience, and has become one of the key technologies of the next generation of multimedia systems. These applications include free-viewpoint TV (FTV) and three-dimensional television (3DTV), etc. Multi-viewpoint video refers to a group of video signals obtained by shooting the same scene from different viewpoints with multiple cameras from different viewpoints, and is an effective representation method of 3D video. With the increase of the number of cameras, the massive data of multi-view video has become a bottleneck restricting its wide application. To this end, the Joint Video Working Group (JVT) compose...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N13/00H04N15/00H04N19/124H04N19/167H04N19/597
Inventor 雷建军吴媺民侯春萍冯坤胡春悦李帅
Owner TIANJIN UNIV
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