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Open Access Research Article

Subgraphs Matching-Based Side Information Generation for Distributed Multiview Video Coding

Hongkai Xiong12*, Hui Lv1, Yongsheng Zhang1, Li Song1, Zhihai He3 and Tsuhan Chen2

Author Affiliations

1 Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

2 Department of Electrical and Computer Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA

3 Department of Electrical and Computer Engineering, University of Missouri-Columbia, MO 65211, USA

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EURASIP Journal on Advances in Signal Processing 2009, 2009:386795  doi:10.1155/2009/386795

Published: 22 March 2010

Abstract

We adopt constrained relaxation for distributed multiview video coding (DMVC). The novel framework integrates the graph-based segmentation and matching to generate interview correlated side information without knowing the camera parameters, inspired by subgraph semantics and sparse decomposition of high-dimensional scale invariant feature data. The sparse data as a good hypothesis space aim for a best matching optimization of interview side information with compact syndromes, from inferred relaxed coset. The plausible filling-in from a priori feature constraints between neighboring views could reinforce a promising compensation to interview side-information generation for joint multiview decoding. The graph-based representations of multiview images are adopted as constrained relaxation, which assists the interview correlation matching for subgraph semantics of the original Wyner-Ziv image by the graph-based image segmentation and the associated scale invariant feature detector MSER (maximally stable extremal regions) and descriptor SIFT (scale-invariant feature transform). In order to find a distinctive feature matching with a more stable approximation, linear (PCA-SIFT) and nonlinear projections (Locally linear embedding) are adopted to reduce the dimension SIFT descriptors, and TPS (thin plate spline) warping model is to catch a more accurate interview motion model. The experimental results validate the high-estimation precision and the rate-distortion improvements.