中文

Journal of Shanghai University（Natural Science Edition） ›› 2015, Vol. 21 ›› Issue (4): 402-413.doi: 10.3969/j.issn.1007-2861.2014.03.016

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Estimation of view synthesis distortion caused by depth map distortion

LI Chun-hua1,2, AN Ping1,3, ZHANG Zhao-yang1,3   

  1. (1. School of Communication and Information Engineering, Shanghai University, Shanghai 200444, China; 2. College of Information Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China; 3. Key Laboratory of Advanced Display and System Applications, Shanghai University, Shanghai 200072, China)
  • Received:2014-02-19 Online:2015-08-31 Published:2015-08-31

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Abstract: A method for estimating the virtual view image distortion caused by the depth map coding distortion is proposed. The depth map is divided into macro blocks according to the coding unit. These macroblocks are then classified into uniform macroblocks and nonuniform macroblocks according to the energy density consistency constraint. The rendered view distortion in the uniform macroblocks is estimated by a block-level frequency domain method, while that in the non-uniform macroblocks by a pixel-level time domain method. Finally, the virtual view distortion is combined with both rendered view distortions. The distortion introduced by inpainting is also computed. With a shooting parameter, it can correctly classify the macroblocks of depth map sequences acquired from different shooting conditions. Simulation results show that the proposed method can accurately estimate virtual view distortion caused by depth map distortion. It achieves effective balance between accuracy and algorithm complexity, which is important to guide 3D video (3DV) coding and rate allocation under the limited bit rate budget.

Key words: 3D video (3DV), depth map distortion, distortion estimation, freeview TV (FTV), virtual view image distortion

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