| 小波变换图像压码延拓匹配与变换系数研究 |
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| 引用本文： | 向渝,李在铭.小波变换图像压码延拓匹配与变换系数研究[J].电子科技大学学报(社会科学版),1999(3). |
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| 作者姓名： | 向渝 李在铭 |
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| 作者单位： | 电子科技大学通信学院!成都６１００５４ |
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| 摘 要： | 研究了延拓匹配，证明了小波变换图像压码中采用Ｄａｕｂ滤波器时，周期延拓比对称延拓在结构上能更好地对滤波器进行匹配；对小波变换域样本场的统计特性和游程概率进行了分析，并在此基础上实现了高压缩比和高信噪比的图像压缩。
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| 关 键 词： | 小波变换 多分辨率图像 边缘延拓 统计特性 |
Study On Extension and Statistics in Image WT Coding |
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| Xiang Yu,Li Zaiming.Study On Extension and Statistics in Image WT Coding[J].Journal of University of Electronic Science and Technology of China(Social Sciences Edition),1999(3). |
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| Authors: | Xiang Yu Li Zaiming |
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| Abstract: | It is proved in this paper that the periodic extension matches the structure of Daub filterbetter than the symmetric extension when using the filter in wavelet image coding. Then, the statisticalproperty of wavelet coefficients and runlength probability are analyzed. Finally high compression ratio andhigh signal-to-noise ratio in image coding are achieved based on above analysis. |
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| Keywords: | wavelet transform multiresolution image edge extension statistical property |
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