An improved tree-structured codebook search algorithm for grayscale image compression

Authors:
Yu-Chen Hu;Chin-Chen Chang
Affiliations:
Department of Computer Science and Information Engineering, Providence University, Shalu, Taichung, Taiwan, R.O.C.;Department of Information Engineering and Computer Science, Feng Chia University, Taichung, Taiwan, R.O.C.
Venue:
Fundamenta Informaticae
Year:
2005

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Abstract

In this paper, an improved tree-structured codebook search algorithm is proposed. It is called the two-level codebook search algorithm (TLCS). The goal of this method is to reduce the computation cost of the multi-path-searching algorithm for TSVQ. It speeds up the codebook search by searching only a two-level codebook tree instead of the whole TSVQ codebook tree. According to the experimental results, a significant time reduction can be achieved with this method, compared to the multi-path-searching algorithm. In other words, our TLCS outperforms the multi-path-searching algorithm.