| 小波变换分解层次对图像压缩效果的影响 |
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| 引用本文： | 朱希安,金声震,周金和.小波变换分解层次对图像压缩效果的影响[J].北京机械工业学院学报,2006,21(2):13-16,20. |
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| 作者姓名： | 朱希安 金声震 周金和 |
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| 作者单位： | [1]北京信息工程学院信息与通信工程系,北京100101 [2]中科院国家天文台,北京100012 |
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| 摘 要： | 小波分析(wavelet analysis)是近10年迅速发展起来的新兴学科,具有深刻的理论意义和广泛的应用范围.简述了小波分析的基本原理,重点地分析了采用嵌入式小波零树编码时,小波变换分解层次对SST(空间太阳望远镜)图像仿真压缩效果的影响.结果表明,随着压缩倍数的增加,所需小波变换的分解层次亦应增加;但当小波变换的分解层次增加到某一值时,信噪比和峰值信噪比将基本保持不变.压缩倍数和小波变换的分解层次之间存在一个较佳匹配问题,对此进行了较为详细的讨论.
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| 关 键 词： | 小波变换 分解层次 嵌入式零树编码 SST图像 压缩效果 |
| 文章编号： | 1008-1658（2006）02-0013-04 |
| 收稿时间： | 2006-04-10 |
| 修稿时间： | 2006-04-10 |
Influence of decomposition level of wavelet transform on images compression effect |
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| ZHU Xi-an,JIN Sheng-zhen,ZHOU Jin-he.Influence of decomposition level of wavelet transform on images compression effect[J].Journal of Beijing Institute of Machinery,2006,21(2):13-16,20. |
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| Authors: | ZHU Xi-an JIN Sheng-zhen ZHOU Jin-he |
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| Abstract: | Wavelet analysis has been a burgeoning technique in the past 10 years,with profound theoretical significance and broad application scopes.In this article,the basic principle of wavelet transform is briefly described,focusing on the influence of decomposition level of wavelet transform on emulate compression effect of SST(space solar telescope) images,when adopting embedded zerotree wavelet coding.The results show that the necessary decomposition levels of wavelet transform should be increased with the multiplying of compression.But when it is increased to a certain level,signal-to-noise and peak signal to noise ratios will keep steadiness.The matching between compression multiple and the decomposition level of wavelet transform is also discussed in detail. |
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| Keywords: | wavelet transform decomposition level embedded zerotree effect coding SST images compression |
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