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Sliding-window designs for vertex-based shape coding

Sohel, Ferdous A.; Karmakar, Gour C.; Dooley, Laurence S. and Bennamoun, Mohammed (2012). Sliding-window designs for vertex-based shape coding. IEEE Transactions on Multimedia, 14(3) 683 -692 .

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DOI (Digital Object Identifier) Link: http://dx.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 realisations. In addition, it presents an efficient bit-allocation strategy for managing multiple shapes together with a generalised adaptive SW scheme which integrates localised 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.

Item Type: Journal Article
Copyright Holders: 2012 IEEE
ISSN: 1520-9210
Keywords: image processing; shape coding; sliding window
Academic Unit/Department: Mathematics, Computing and Technology > Computing & Communications
Interdisciplinary Research Centre: Centre for Research in Computing (CRC)
Item ID: 30927
Depositing User: Laurence Dooley
Date Deposited: 23 May 2012 14:29
Last Modified: 12 Dec 2012 08:19
URI: http://oro.open.ac.uk/id/eprint/30927
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