| 一种小波域的分形图象编码新算法 |
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| 引用本文： | 张宗念,马义德,余英林.一种小波域的分形图象编码新算法[J].华南理工大学学报(自然科学版),1999,27(8):98-102. |
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| 作者姓名： | 张宗念 马义德 余英林 |
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| 作者单位： | 华南理工大学电子与信息学院!广州510640(张宗念，余英林)，兰州大学电信系!兰州730000(马义德) |
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| 摘 要： | 本文在分析了小波域内分形图象编码原理的基础上， 将零树思想引入到小波域的分形图象编码中， 通过定义方向性零（ 子） 树的概念， 提出了一种小波域的分形图象编码的新算法．该算法简单实用、计算量小．实验表明， 对５１２ ×５１２ 的８ 比特Ｌｅｎａ 图象在ＰＮＳＲ 等于２９ ．６７ ｄＢ时， 压缩比达６６ ．４８ ， 远远优于ＪＰＥＧ的编码性能， 是目前文献报道的有关小波域内分形图象压缩编码的最好结果
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| 关 键 词： | 小波 分形编码 图象压缩 算法 分形图象编码 |
A NOVEL ALGORITHM FOR WAVELET_BASED FRACTAL IMAGE CODING * |
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| Zhang Zongnian Ma Yide,Yu Yinglin.A NOVEL ALGORITHM FOR WAVELET_BASED FRACTAL IMAGE CODING *[J].Journal of South China University of Technology(Natural Science Edition),1999,27(8):98-102. |
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| Authors: | Zhang Zongnian Ma Yide Yu Yinglin |
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| Institution: | Zhang Zongnian Ma Yide ** Yu Yinglin |
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| Abstract: | Various wavelet_based fractal image coding algorithms are analyzed. A novel algorithm for wavelet_based fractal image coding is proposed through the introduction of zerotrees to wavelet_based fractal coding and the definition of oriented wavelet zerotrees(subtrees).The algorithms can achieve better coding performance in terms of PSNR and subjective quality as compared to JPEG and all of other algorithms of wavelet_fractal coding at roughly the same compression ratio. |
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| Keywords: | wavelet fractal coding image compression algorithm |
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