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. -
Jacquin A.Image coding based on a fractal theory of iterated contractive image transforms.IEEE Trans.on Image Processing,1992,IP-1(1):18-30.[2]Shapiro J M.Embedded image coding using zerotrees of wavelet coefficients.IEEE Trans.on Signal Processing,1993,SP-41(12):3445-3462.[3]Rinaldo R,Calvagno G.Image coding by block prediction of multiresolution subimages.IEEE Trans.on Image Processing,1995,IP-4(7):909-920.[4]Axel van de Walle.Merging Fractal Image Compression and Wavelet Transform Methods.In Fractal Image Coding Analysis:A NATO Series Book,Yuval Fisher,Ed.New York:Springer Verlag,1996,523-597.[5]Krupnik H,Malah D,Karnin E.Fractal representation of images via the discrete wavelet transform.In IEEE 18th Conf.of EE,Israel:1995,3:187-191.[6]Davis G.Adaptive self-quantization of wavelet subtrees:A wavelet-based theory of fractal image compression.SPIE Conf.on Mathematical Imaging:Wavelet applications in Signal and Image Processing,San Diego:1995,265-279.[7]Davis G.A vavelet-based analysis of fractal image compression.IEEE Trans.on Image Compression,1998,IC-7(2):141-154.[8]张颖，余英林，Po L M．基于分形和小波变换的自适应混合图像编码．电子学报，1998，26(10)：69-74．[9]Witten I,Neal R,Cleary J.Arithmetic coding for data compression[J].Commun.of the ACM.1987,30(6):520-540 -
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