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Sliding-window designs for vertex-based shape coding
Journal article   Peer reviewed

Sliding-window designs for vertex-based shape coding

F.A. Sohel, G.C. Karmakar, L.S. Dooley and M. Bennamoun
IEEE Transactions on Multimedia, Vol.14(3), pp.683-692
2012
DOI: https://doi.org/10.1109/TMM.2011.2182507
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Abstract

Traditionally the sliding window (SW) has been employed in vertex-based operational rate distortion (ORD) optimal shape coding algorithms to ensure consistent distortion (quality) measurement and improve computational efficiency. It also regulates the memory requirements for an encoder design enabling regular, symmetrical hardware implementations. This paper presents a series of new enhancements to existing techniques for determining the best SW-length within a rate-distortion (RD) framework, and analyses the nexus between SW-length and storage for ORD hardware realizations. In addition, it presents an efficient bit-allocation strategy for managing multiple shapes together with a generalized adaptive SW scheme which integrates localized curvature information (cornerity) on contour points with a bi-directional spatial distance, to afford a superior and more pragmatic SW design compared with existing adaptive SW solutions which are based on only cornerity values. Experimental results consistently corroborate the effectiveness of these new strategies.

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7 Times Cited - Web of Science

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4 Electrical Engineering, Electronics & Computer Science
4.101 Security, Encryption & Encoding
4.101.178 Video Coding
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Computer Science, Information Systems
Computer Science, Software Engineering
Telecommunications
ESI research areas
Computer Science
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