Lift wavelet image coding algorithm based on fractal coding and zerotree
Yan Li · Computer Engineering and Applications Journal · 2009
In order to improve the result of image compression,this paper analyzes the basic concept of lift wavelet transform and the processing procedure,and advances an approach of lift wavelet image compression algorithm based on fractal coding and zerotree.Based on original method of lift wavelet image compression,a matching result is directly used to the wavelet subtrees with only few former lower resolution sub sets because of the poor self-similarities within higher resolution subsets when the matching forecast result of the images is processed.This means that the higher resolution subsets are not used to implement the fractal coding match but uses a improved method of lift wavelet coding.The hybrid image compression algorithm and the process based on wavelet transforming using both fractal coding and zerotree coding is improved.The experiment show,that the encoding time of this algorithm is remarkably speed up.At the same time,the essence and the improving direction of wavelet combine with fractal coding and zerotree coding is discussed in the paper.