Title :
EZW algorithm using depth-first representation of the wavelet zerotree
Author :
Ang, Li-Minn ; Cheung, Hon Nin ; Eshraghian, Kamran
Author_Institution :
Centre for Very High Speed Microelectron. Syst., Edith Cowan Univ., Joondalup, WA, Australia
Abstract :
In this paper, we present a scheme for the implementation of the embedded zerotree wavelet (EZW) algorithm. The approach is based on using a depth-first search (DFS) to traverse the ancestor-descendant tree hierarchies of the wavelet coefficients. The EZW algorithm uses a raster scan to encode the coefficients. Two other tree-searching strategies to encode the coefficients would be by using a breath-first or depth-first traversal of the wavelet coefficients in the tree hierarchies. The DFS simplifies and diversifies the implementation of the EZW algorithm at the expense of a slight decrease in coding efficiency. The different tree-searching strategies are compared and simulation results using standard images are presented
Keywords :
image coding; image representation; transform coding; tree searching; wavelet transforms; EZW algorithm; ancestor-descendant tree hierarchies; coding efficiency; depth-first representation; depth-first search; embedded zerotree wavelet algorithm; image coding; raster scan; tree-searching strategies; wavelet zerotree; Australia; Discrete wavelet transforms; Encoding; Frequency; Microelectronics; Robustness; Scalability; Signal processing algorithms; Streaming media; Wavelet coefficients;
Conference_Titel :
Signal Processing and Its Applications, 1999. ISSPA '99. Proceedings of the Fifth International Symposium on
Conference_Location :
Brisbane, Qld.
Print_ISBN :
1-86435-451-8
DOI :
10.1109/ISSPA.1999.818116