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Applied Sciences, Vol. 8, Pages 823: Reliability-Based View Synthesis for Free Viewpoint Video

20 May 2018

Applied Sciences, Vol. 8, Pages 823: Reliability-Based View Synthesis for Free Viewpoint Video

Applied Sciences doi: 10.3390/app8050823

Authors:
Zengming Deng
Mingjiang Wang

View synthesis is a crucial technique for free viewpoint video and multi-view video coding because of its capability to render an unlimited number of virtual viewpoints from adjacent captured texture images and corresponding depth maps. The accuracy of depth maps is very important to the rendering quality, since depth image–based rendering (DIBR) is the most widely used technology among synthesis algorithms. There are some issues due to the fact that stereo depth estimation is error-prone. In addition, filling occlusions is another challenge in producing desirable synthesized images. In this paper, we propose a reliability-based view synthesis framework. A depth refinement method is used to check the reliability of depth values and refine some of the unreliable pixels, and an adaptive background modeling algorithm is utilized to construct a background image aiming to fill the remaining empty regions after a proposed weighted blending process. Finally, the proposed approach is implemented and tested on test video sequences, and experimental results indicate objective and subjective improvements compared to previous view synthesis methods.

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