| 结点阈值小波包变换图像去噪新算法 |
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| 引用本文： | 郑德忠,崔法毅.结点阈值小波包变换图像去噪新算法[J].光学技术,2009,35(3). |
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| 作者姓名： | 郑德忠 崔法毅 |
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| 作者单位： | 燕山大学,河北省测试计量技术及仪器重点实验室,河北,秦皇岛,066004 |
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| 基金项目： | 教育部高等学校博士学科点专项科研基金 |
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| 摘 要： | 小波包变换是小波变换的推广,可视为普通小波函数的线性组合,具有灵活的时频分析能力,随着分解层数的增加,小波包分解能够在所有的频率范围聚焦。提出一种应用结点阈值小波包变换的新型图像去噪算法。利用小波包变换对含噪图像进行分解,在图像信号的子带层次上进行结点阈值操作,采用软阈值的方法进行阈值处理,结点噪声采用谱熵法估计,并使用峰值信噪比评估去噪后的图像质量。实验结果表明,相比于使用其它阈值方法的小波包图像去噪算法,该算法具有更好的图像去噪性能。
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| 关 键 词： | 图像去噪 小波包变换 结点阈值 谱熵法 |
New algorithm for image de-noising using node threshold wavelet packet transform |
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| ZHENG De-zhong,CUI Fa-yi.New algorithm for image de-noising using node threshold wavelet packet transform[J].Optical Technique,2009,35(3). |
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| Authors: | ZHENG De-zhong CUI Fa-yi |
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| Institution: | Measurement Technology and Instrumentation Key Lab of Hebei Province;Yanshan University;Qinhuangdao 066004;China |
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| Abstract: | Wavelet packet transform,which is derived from wavelet transform,can be considered as a linear combination of general wavelet functions and has flexible time-frequency analysis ability.With decomposition level increases,wavelet packet decomposition can focus in range of all frequency.A new algorithm is proposed for image de-noising using node threshold wavelet packet transform.Wavelet packet transform is used for noisy image decomposition.This method operates threshold at sub-band of image signal,uses soft ... |
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| Keywords: | image de-noising wavelet packet transform node threshold spectral entropy method |
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