Title :
On zerotree quantization for embedded wavelet packet image coding
Author :
Rajpoot, Nasir M. ; Meyer, F.G. ; Wilson, Roland ; Coifman, R.R.
Author_Institution :
Dept. of Comput. Sci., Warwick Univ., Coventry, UK
Abstract :
Wavelet packets are an effective representation tool for adaptive waveform analysis of a given signal. We first combine the wavelet packet representation with zerotree quantization for image coding. A general zerotree structure is defined which can adapt itself to any arbitrary wavelet packet basis. We then describe an efficient coding algorithm based on this structure. Finally, the hypothesis for prediction of coefficients from coarser scale to finer scale is tested and its effectiveness is compared with that of zerotree hypothesis for wavelet coefficients.
Keywords :
image coding; vector quantisation; wavelet transforms; coding algorithm; embedded wavelet packet image coding; wavelet packet representation; zerotree quantization; Computed tomography; Computer science; Frequency; Image coding; Quantization; Signal analysis; Testing; Wavelet analysis; Wavelet coefficients; Wavelet packets;
Conference_Titel :
Image Processing, 1999. ICIP 99. Proceedings. 1999 International Conference on
Conference_Location :
Kobe
Print_ISBN :
0-7803-5467-2
DOI :
10.1109/ICIP.1999.822901
