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Research of Virtual View Rendering for Multiview Video

Author: WangChao
Tutor: YuLi
School: Huazhong University of Science and Technology
Course: Communication and Information System
Keywords: Multiview Video Virtual viewpoint rendering Three-dimensional folding maps False contour
CLC: TP391.41
Type: Master's thesis
Year: 2011
Downloads: 31
Quote: 0
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Abstract


Visual information as the main way people access to outside information, in the past few decades, gained rapid development. So far, the two-dimensional high-definition video has been a wide range of applications, multi-view video is about to become the new hot spot for the development of the field of video. Multi-view video while the two-dimensional image is presented to the user, but also provide in-depth information, so as to bring the three-dimensional visual experience to the user. The Multiview Video in stereoscopic television, free viewpoint television, telepresence video conferencing and virtual reality field has broad application prospects. However, the amount of data is too large multi-view video, have brought a great challenge to the compression, storage and transmission of video data. One of the solutions to solve this problem is the video capture side sparse array decoding and then draw a virtual viewpoint, in order to achieve the purpose of improving the coding efficiency. Firstly, the overall multi-view video system. It contains several modules of the video signal acquisition, encoding, transmission, virtual viewpoint painted, three-dimensional display. Subsequent study of the basic principle of drawing the viewpoint based on the depth information, including the geometric relationships of the pinhole camera model, and a three-dimensional space point, and the imaging plane of pixel points. This paper focuses on the technical viewpoint rendering technique based on the depth of information - three-dimensional folding mapping (3D warping). First studied classical 3D warping program and analysis of the problems of the method, that is empty, crack problem, obscured the issue of regional issues and false contour; subsequent analysis and comparison of the advantages and disadvantages of the existing solutions; Finally In this method, according to the relative position of the reference viewpoint virtual viewpoint rendering algorithm based on credible zoning, edge detection, the reference view is divided trusted regional and untrusted areas trusted forward 3D warping projected onto the virtual viewpoint Next, the virtual depth map obtained by the synthesis of two reference viewpoint, the reverse mapping of the virtual viewpoint in the hollow region, and finally combined with the depth map image patch, to further improve the subjective quality of the viewpoint. The experimental results show that the rendering algorithm proposed in this paper can be a good solution to the problem of voids, cracks, occlusion area and false contour synthesized virtual viewpoint subjective effects, also has a higher signal-to-noise ratio.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
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