A wavelet packet image coding algorithm based on quadtree classification and UTCQ

Author

Hou, Xingsong ; Liu, Guizhong

Author_Institution

Sch. of Electron. & Inf. Eng., Xi´´an Jiaotong Univ., China

Volume

2

fYear

2003

fDate

6-9 July 2003

Abstract

In this paper, we present a wavelet packet image coding algorithm based on quadtree classification and UTCQ. It is composed of four parts: (1) wavelet packet decomposition and best basis selection based on a new cost function, (2) a quadtree classification procedure, used to classify the wavelet packet coefficients into two sets: a significant one and an insignificant one, (3) the universal trellis coded quantization, used to code the significant coefficients sets, (4) the entropy coder, used to code the indices of the universal trellis coded quantizer output. The image coding results, calculated from actual file sizes and images reconstructed by the decoding algorithm are either comparable to or surpass previous results for texture-rich images.

Keywords

image classification; image coding; image reconstruction; quadtrees; trellis codes; wavelet transforms; UTCQ; cost function; decoding algorithm; entropy coder; quadtree classification; universal trellis coded quantization; wavelet packet coefficients; wavelet packet decomposition; wavelet packet image coding algorithm; Basis algorithms; Cost function; Entropy; Image coding; Image reconstruction; Libraries; Quantization; Wavelet coefficients; Wavelet packets; Wavelet transforms;

fLanguage

English

Publisher

ieee

Conference_Titel

Multimedia and Expo, 2003. ICME '03. Proceedings. 2003 International Conference on

Print_ISBN

0-7803-7965-9

Type

conf

DOI

10.1109/ICME.2003.1221676

Filename

1221676