| 基于分形的小波分析压缩编码 |
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| 引用本文： | 丁么明,张国平.基于分形的小波分析压缩编码[J].光学技术,2001,27(1):39-40. |
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| 作者姓名： | 丁么明 张国平 |
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| 作者单位： | 1. 孝感学院物理系,
2. 华中师范大学物理系, |
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| 基金项目： | 教育部科学技术研究重点项目资助!(项目号 :990 86) |
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| 摘 要： | 分析了小波及分形在图形压缩编码中的特点 ,构造了Haar小波树 ,提出基于分形的小波域图像压缩编码的算法。实验证明 :该方法在相近的压缩比的情况下 ,使重建图像的PSNR增加 4 1,图像压缩速度明显提高 ,并且重建图像的主观视觉质量也优于JPEG。
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| 关 键 词： | 分形编码 小波变换 图像压缩 算法 |
| 文章编号： | 1002-1582(2000)01-0039-02 |
| 修稿时间： | 2000年5月24日 |
Based the hybrid coding for image compression on fractal and wavelet analysics |
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| DING Yao-ming,ZHANG Guo-pin.Based the hybrid coding for image compression on fractal and wavelet analysics[J].Optical Technique,2001,27(1):39-40. |
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| Authors: | DING Yao-ming ZHANG Guo-pin |
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| Abstract: | The characteristics of wavelet and fractal for image compression coding are studied at first. Haar wavelet subtrees is built The conventional fractal coding in spatial domain is extended to wavelet domain by employing the self-similarities between different wavelet subtrees through proper affine transformation Further, in order to achieve a good trade off between image quality and compression ratio, an adaptive partition algorithm is given which can split the wavelet subtree into children subtrees according to local image complexity Experimental results show that the new hybrid image compression algorithm can obtain much better coding performance in terms of PSNR and subjective quality as compared to JPEG at roughly the same compression rate |
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| Keywords: | fractal coding wavelet transform image compression algorith |
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