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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/229

Title: Image compression using zerotree and multistage vector quantization
Authors: KARLEKAR, JAYASHREE
POONACHA, PG
DESAI, UB
Keywords: huffman codes
data compression
image coding
image reconstruction
vector quantisation
tree data structures
Issue Date: 1997
Publisher: IEEE
Citation: Proceedings of the International Conference on Image Processing (V 2), Santa Barbara, USA, 26-29 October 1997, 601-612
Abstract: The embedded zerotree of the wavelet coefficient (EZW) algorithm has become an effective way of compressing images. The use of multistage vector quantizer (MSVQ) provides successive-approximation coding for vectors. A new algorithm is proposed that, provides good quality of reconstructed images at very low bit rates. The algorithm uses successive-approximation quantization of both scalars and vectors on the wavelet coefficients of the image. Successive-approximation quantization of scalars and vectors is done using EZW and MSVQ algorithms respectively. The EZW algorithm is applied to wavelet coefficients belonging to coarser level subbands and MSVQ is applied to vectors of wavelet coefficients belonging to finer level subbands. The proposed method further uses static Huffman coding to achieve more compression.
URI: 10.1109/ICIP.1997.638845
http://hdl.handle.net/10054/229
http://dspace.library.iitb.ac.in/xmlui/handle/10054/229
ISBN: 0-8186-8183-7
Appears in Collections:Proceedings papers

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