Spatial model of lifting scheme in wavelet transforms and image compression

Yu Wu; Gang Li; Guoyin Wang

doi:10.1117/12.458759

8 March 2002 Spatial model of lifting scheme in wavelet transforms and image compression

Yu Wu, Gang Li, Guoyin Wang

Proceedings Volume 4738, Wavelet and Independent Component Analysis Applications IX; (2002) https://doi.org/10.1117/12.458759
Event: AeroSense 2002, 2002, Orlando, FL, United States

Abstract

Wavelet transforms via lifting scheme are called the second-generation wavelet transforms. However, in some lifting schemes the coefficients are transformed using mathematical method from the first-generation wavelets, so the filters with better performance using in lifting are limited. The spatial structures of lifting scheme are also simple. For example, the classical lifting scheme, predicting-updating, is two-stage, and most researchers simply adopt this structure. In addition, in most design results the lifting filters are not only hard to get and also fixed. In our former work, we had presented a new three-stage lifting scheme, predicting-updating-adapting, and the results of filter design are no more fixed. In this paper, we continue to research the spatial model of lifting scheme. A group of general multi-stage lifting schemes are achieved and designed. All lifting filters are designed in spatial domain and proper mathematical methods are selected. Our designed coefficients are flexible and can be adjusted according to different data. We give the mathematical design details in this paper. Finally, all designed model of lifting are used in image compression and satisfactory results are achieved.

Citation Download Citation

Yu Wu, Gang Li, and Guoyin Wang "Spatial model of lifting scheme in wavelet transforms and image compression", Proc. SPIE 4738, Wavelet and Independent Component Analysis Applications IX, (8 March 2002); https://doi.org/10.1117/12.458759

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