標題: A Synthesis-Quality-Oriented Depth Refinement Scheme for MPEG Free Viewpoint Television (FTV)
作者: Chen, Chun-Chi
Chen, Yi-Wen
Yang, Fu-Yao
Peng, Wen-Hsiao
資訊工程學系
Department of Computer Science
公開日期: 2009
摘要: This paper addresses the problem of refining depth information front the received reference and depth images within the MPEG FT V framework. An analytical model is first developed to approximate the per-pixel synthesis distortion (caused by depth-image compression) as a function of depth-error variances, intensity variations, ground-truth depth and virtual camera locations. We then follow the model to detect unreliable depth pixels by inspecting intensity gradients and to refine their values with a candidate-based block disparity search. Additional side information is transmitted to make both operations robust against compression effects. Experimental results show that our scheme offers an average PSNR improvement of 1.2 dB over MPEG FTV and consistently outperforms the state-of-the-art methods. Moreover, it can remove synthesis artifacts to a great extent, producing a result that is very close in appearance to the ground-truth view image.
URI: http://hdl.handle.net/11536/14545
http://dx.doi.org/10.1109/ISM.2009.68
ISBN: 978-1-4244-5231-6
DOI: 10.1109/ISM.2009.68
期刊: 2009 11TH IEEE INTERNATIOINAL SYMPOSIUM ON MULTIMEDIA (ISM 2009)
起始頁: 171
結束頁: 178
Appears in Collections:Conferences Paper


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