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Depth Map Generation Method Between Viewpoints of 3DV System Using Depth Propagation Technology

A technology of depth propagation and depth map, which is applied in the field of depth map generation between viewpoints of 3DV (3D video) system, which can solve the problem of occupying transmission bandwidth, and achieve the effect of high accuracy, saving coding resources and accurate depth value.

Inactive Publication Date: 2015-08-05
SHANDONG UNIV
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  • Claims
  • Application Information

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Problems solved by technology

All these information need to be generated by calculation at the encoding end and occupy the transmission bandwidth

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  • Depth Map Generation Method Between Viewpoints of 3DV System Using Depth Propagation Technology
  • Depth Map Generation Method Between Viewpoints of 3DV System Using Depth Propagation Technology
  • Depth Map Generation Method Between Viewpoints of 3DV System Using Depth Propagation Technology

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Embodiment Construction

[0019] In order to simulate the conditions of the real 3DV system receiving end, the present invention selects and tests MVD format data after encoding and reconstruction. The test uniformly adopts the HEVC standard for encoding, and the quantization parameter QP value is set to 18, and experiments can also be carried out under other experimental conditions. The two viewpoints that both the texture map and the depth map are transmitted in the receiving end of the 3DV system are defined as key viewpoints, and the viewpoints that need to generate depth maps through depth propagation are defined as non-key viewpoints. The depth propagation process between viewpoints is as follows: figure 1 As shown in , given the depth maps of viewpoint 0 and viewpoint N and the texture maps of all viewpoints, the depth maps of other viewpoints can be depth-propagated. In the present invention, two key viewpoints are selected and bidirectional self-adaptive overlapping block parallax compensatio...

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Abstract

The invention provides a 3DV system inter-viewpoint depth image generating method adopting a depth spread technology. The inter-viewpoint bidirectional depth spread technology is adopted by the method, firstly, assignment is carried out on a depth value representing a pixel through parallax compensation of a bidirectional self-adaption overlapped block, on the basis of the brightness and depth consistency principle, a constrained optimization equation is built on the pixel without conducting depth assignment, then the equation is solved, and therefore the depth image of the viewpoints is obtained. According to the method, an existing 3DV system only needs to conduct encoding and transmit a texture image and the depth image of the two viewpoints so that multi-viewpoint depth data with the quality equivalent to that of depth data obtained with a common depth view encoding method can be obtained at a decoding terminal, the transmission bandwidth and encoding resources of a sending terminal are saved, and the method has the potential application value in the 3D video encoding and decoding fields.

Description

technical field [0001] The invention relates to a method for generating a depth map between viewpoints of a 3DV (three-dimensional video) system, and belongs to the technical fields of video codec and multimedia signal processing. Background technique [0002] Today, 3D video is used more and more widely in the film industry and consumer electronics industry. Thanks to the development of the 3D display technology, the multi-viewpoint display technology has gradually developed and improved the user's visual experience. However, the increase in data volume brought about by multi-view display makes the compression, storage and transmission of multi-view video data in 3D video (3DV) systems a challenge. [0003] The commonly used data format in the 3DV system is multi-view video plus depth (MVD) format, which includes multi-view texture views and corresponding depth views. This depth-based data format contains depth information as part of the input information, and uses DIBR t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N13/00H04N19/597H04N19/583
Inventor 刘琚曹广昊葛川葛菁
Owner SHANDONG UNIV