| 二维小波在图像压缩方面的应用 |
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| 引用本文： | 刘伟,李莉,夏立显.二维小波在图像压缩方面的应用[J].吉林大学学报(信息科学版),2004,22(1):9-12. |
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| 作者姓名： | 刘伟 李莉 夏立显 |
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| 作者单位： | 吉林大学,综合信息矿产预测研究所,吉林,长春,130026;吉林建筑工程学院基础科学系,吉林,长春,130021;吉林建筑工程学院,基础科学系,吉林,长春,130021;吉林大学,综合信息矿产预测研究所,吉林,长春,130026 |
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| 摘 要： | 讨论了二维小波分解和重构两种算法.给出了两种算法的比较和Matlab实现过程.结果证明,只保留原始图像中低频信息的压缩方法是一种简单的压缩方法,不需要经过其他处理即可获得较好的压缩效果.运用小波树进行图像压缩时,通常在给定小波基函数条件下,阈值越大,系数为零的数目就越多,重构图像文件压缩率也越高,重构的图像失真程度亦随之增大.
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| 关 键 词： | 小波变换 多分辨分析 图像压缩 |
| 文章编号： | 1671-5896(2004)01-0009-04 |
| 修稿时间： | 2003年7月8日 |
Application of 2-D wavelet analysis on image compression |
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| LIU Wei.Application of 2-D wavelet analysis on image compression[J].Journal of Jilin University:Information Sci Ed,2004,22(1):9-12. |
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| Authors: | LIU Wei |
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| Abstract: | The theory of 2-D wavelet and its decomposition and reconstruction algorithms is discussed. The conclusion is made from the comparison of two algorithms by using Matlab .The result shows that the method of keeping low frequency compression of information in primitive image is a simple compression method, through which better compression effects can be made without other treatments. Appling wavelet tree to make image compress, usually with the given wavelet primary function, the larger the threshold value is, the more the number of coefficient being zero will be, also the compressing ratio of reconstruction image file is higher with the increasing infidelity degree. |
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| Keywords: | wavelet transform multi-resolution analysis image compression |
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