中文

Journal of Applied Sciences ›› 2011, Vol. 29 ›› Issue (3): 299-307.doi: 10.3969/j.issn.0255-8297.2011.03.014

• Signal and Information Processing • Previous Articles     Next Articles

Depth Map Coding Oriented to Virtual View Synthesis in FTV System

ZHANG Qiu-wen1, AN Ping1;2, ZHANG Yan1;3, ZHANG Zhao-yang1;2   

  1. 1. School of Communication and Information Engineering, Shanghai University, Shanghai 200072, China
    2. Key Laboratory of Advanced Displays and System Application, Ministry of Education,
    Shanghai 200072, China
    3. Department of Computer Science and Technology, Anhui University of Finance and Economics,
    Bengbu 230030, Anhui Province, China
  • Received:2010-09-21 Revised:2011-04-06 Online:2011-05-26 Published:2011-05-26

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Abstract:

A depth map compression method oriented to virtual view rendering is proposed to reduce distortion of virtual view synthesis in a free-viewpoint television (FTV) system. The distortion is caused by quantization of depth data and inaccuracy of depth estimation algorithm. According to the statistics of depth data, a depth down/up sampling techniques based on the non-uniform B-spline curve is proposed. The depth map is down-sampled and coded with MVC. In the de-coding side, the depth map is up-sampled. To deal with the serration phenomenon in edges of the decoded depth image, a bilateral filtering is used to align the object boundaries. The experimental results evaluated by objective and subjective methods indicate that the proposed method can reduce bit-rate of depth coding and achieve better rendering quality. It can improve high-accurate reconstruction of synthesized images at the receiver of FTV systems.

Key words:  free-viewpoint television (FTV), view synthesis, depth coding, multi-view video coding (MVC)

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