DocumentCode :
147008
Title :
Adaptive Edge Encoding Schemes for the Rate-Distortion Optimal Polygon-Based Shape Coding
Author :
Junhuan Zhu ; Zhongyuan Lai ; Wenyu Liu ; Jiebo Luo
Author_Institution :
Deptment of Comput. Sci., Univ. of Rochester, Rochester, NY, USA
fYear :
2014
fDate :
26-28 March 2014
Firstpage :
103
Lastpage :
112
Abstract :
In this paper, we present two adaptive edge encoding schemes for the operational rate-distortion optimal polygon-based shape coding. The encoding edge is represented by an octant number, a major component, and a minor component, where the ranges of the two components are determined at two levels. For the object-level, these ranges are either determined by users or adaptive to the contour characteristics and the predefined admissible distortions using the discrete contour evolution method. For the edge-level, the range of the minor component is further adaptive to the magnitude of the major component. The appropriate code tables are selected for the two components according to their ranges. Experiments on MPEG-4 test sequences showed that our schemes outperform existing schemes in terms of bit-rate at the same distortion level.
Keywords :
adaptive codes; image sequences; rate distortion theory; video coding; MPEG-4 test sequences; adaptive edge encoding schemes; code tables; contour characteristics; discrete contour evolution method; distortion level; major component; minor component; object-level; octant number; operational rate-distortion optimal polygon-based shape coding; Approximation algorithms; Data compression; Distortion measurement; Educational institutions; Encoding; Rate-distortion; Shape;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Data Compression Conference (DCC), 2014
Conference_Location :
Snowbird, UT
ISSN :
1068-0314
Type :
conf
DOI :
10.1109/DCC.2014.28
Filename :
6824418
Link To Document :
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