基于方向性零树小波的分形图像编码
ORIENTED ZEROTREE WAVELET-BASED FRACTAL IMAGE CODING
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摘要: 该文阐述了分形图像方块编码在小波变换域内实现的原理，将零树概念扩展后与小波域的分形仿射变换相结合，提出一种基于方向性零树小波的分形图像编码方法。计算机模拟实验表明，在高压缩比时，其编码性能优于典型的基于四叉树分割的分形图像编码性能，接近于嵌入式零树小波编码(EZW)的性能。
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关键词:
- 零树; 小波变换; 分形编码; 图像压缩
Abstract: In this paper,the wavelet-based fractal block image coding is introduced.A new oriented zerotree wavelet-based fractal image coding is presented through the combination of zerotree wavelet and fractal image coding.Experimental results show that the performance of this new approach outperforms that of fractal image coding with quadtrees and is almost comparable to that of embedded zerotree wavelet coding (EZW) at high compression ratios. -
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