| 基于非抽取小波变换贝叶斯估计的水下红外图像去噪 |
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| 引用本文： | 卢明波,周军. 基于非抽取小波变换贝叶斯估计的水下红外图像去噪[J]. 海洋技术学报, 2010, 29(1) |
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| 作者姓名： | 卢明波 周军 |
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| 作者单位： | 呼伦贝尔学院信息科学学院,内蒙古,呼伦贝尔,021008;东北电力大学电气工程学院,吉林省,吉林市,132012 |
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| 基金项目： | 国家自然科学基金资助项目(10547111);;内蒙古自然科学基金资助项目(200508010105) |
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| 摘 要： | 利用非抽取小波变换的平移不变性和冗余性的特点,在贝叶斯估计下,结合广义高斯分布(GGD)对小波系数进行建模,构造了一个基于拉普拉斯分布的MapShrink子带自适应图像去噪算法和阈值函数。对HH1子带小波系数进行2j抽取,并估计噪声方差,该算法有效地抑制了伪吉布斯现象。仿真结果表明,利用新算法进行水下红外图像去噪,在信噪比增益和最小均方误差意义上均优于传统的Bayesian去噪方法。
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| 关 键 词： | 图像去噪 Bayesian 方法 最大后验准则 |
Underwater Infrared Image Denoising Based on Un-decimated Wavelet Transform Bayesian Estimation |
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| LU Ming-bo,ZHOU Jun. Underwater Infrared Image Denoising Based on Un-decimated Wavelet Transform Bayesian Estimation[J]. Ocean Technology, 2010, 29(1) |
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| Authors: | LU Ming-bo ZHOU Jun |
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| Affiliation: | 1.School of Information Science Hulunbeier College;Hulunbeier Neimenggu 0210008;China;2.Electrical Engineering College;Northeast Dianli University;Jilin Jilin 132012;China |
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| Abstract: | Considering the characteristic of shift invariance and redundancy of un-decimated wavelet transform,the model for wavelet coefficients based on Bayesian estimation and Generalized Gaussian distribution(GGD) is built,finally,constructs MapShrink subband adaptive image denoising algorithm and thresholding function based on Laplacian distribution.The algorithm makes 2J extraction for HH1 subband coefficients,not only estimates noise variance but also effectively restrains Pseudo-Gibbs phenomenon.Simulation res... |
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| Keywords: | image denoising Bayesian Estimation maximum aposteriori estimation |
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