DocumentCode :
3514934
Title :
Modeling of contours in wavelet domain for generalized lifting image compression
Author :
Rolón, Julio C. ; Ortega, Antonio ; Salembier, Philippe
Author_Institution :
Dept. of Signal Theor. & Commun., Tech. Univ. of Catalonia (UPC), Barcelona
fYear :
2009
fDate :
19-24 April 2009
Firstpage :
1025
Lastpage :
1028
Abstract :
This paper introduces the design of context-based models of contours in the wavelet domain, which are used to construct generalized lifting (GL) mappings for image compression. The GL context-based mapping may significantly reduce the signal energy and the resulting bitrate. Here, we propose a strategy to define a reduced set of structured models to design the GL. The models capture the contour structures and are contrast-invariant. Initial experimental results applying the strategy on a wavelet subband exhibit potential gains. Iterations of the GL scheme as well as an adaptive entropy coding strategy may increase the coding gain.
Keywords :
adaptive codes; entropy codes; image coding; wavelet transforms; GL context-based mapping; adaptive entropy coding strategy; coding gain; context-based models; contour structures; generalized lifting image compression; generalized lifting mappings; signal energy; wavelet domain; wavelet subband; Bit rate; Context modeling; Decoding; Decorrelation; Discrete wavelet transforms; Image coding; Signal mapping; Signal processing; Wavelet coefficients; Wavelet domain; Generalized lifting; contour model; image coding; pdf model; wavelets;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Acoustics, Speech and Signal Processing, 2009. ICASSP 2009. IEEE International Conference on
Conference_Location :
Taipei
ISSN :
1520-6149
Print_ISBN :
978-1-4244-2353-8
Electronic_ISBN :
1520-6149
Type :
conf
DOI :
10.1109/ICASSP.2009.4959761
Filename :
4959761
Link To Document :
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