Image compression with a hybrid wavelet-fractal coder

Author

Li, Jin ; Kuo, C. C Jay

Author_Institution

Sharp Labs. of America, Camas, WA, USA

Volume

8

Issue

6

fYear

1999

fDate

6/1/1999 12:00:00 AM

Firstpage

868

Lastpage

874

Abstract

A hybrid wavelet-fractal coder (WFC) for image compression is proposed. The WFC uses the fractal contractive mapping to predict the wavelet coefficients of the higher resolution from those of the lower resolution and then encode the prediction residue with a bitplane wavelet coder. The fractal prediction is adaptively applied only to regions where the rate saving offered by fractal prediction justifies its overhead. A rate-distortion criterion is derived to evaluate the fractal rate saving and used to select the optimal fractal parameter set for WFC. The superior performance of the WFC is demonstrated with extensive experimental results

Keywords

data compression; fractals; image coding; image resolution; rate distortion theory; transform coding; wavelet transforms; bitplane wavelet coder; experimental results; fractal contractive mapping; fractal prediction; fractal rate saving; hybrid wavelet-fractal coder; image compression; image resolution; optimal fractal parameter set; overhead; performance; prediction residue; rate-distortion criterion; wavelet coefficients prediction; Bit rate; Boring; Fractals; Image coding; Image quality; Quantization; Rate-distortion; Spatial resolution; Wavelet coefficients; Wavelet domain;

fLanguage

English

Journal_Title

Image Processing, IEEE Transactions on

Publisher

ieee

ISSN

1057-7149

Type

jour

DOI

10.1109/83.766863

Filename

766863