| 用二元树复小波变换法实现离焦图像的半盲复原 |
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| 引用本文： | 李征,苏理云,杨舰,琚生根. 用二元树复小波变换法实现离焦图像的半盲复原[J]. 四川大学学报(自然科学版), 2007, 44(2): 316-320 |
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| 作者姓名： | 李征 苏理云 杨舰 琚生根 |
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| 作者单位： | 四川大学计算机学院,成都,610064;四川大学数学学院,成都,610064;电子科技大学微电子与固体学院,成都,610054 |
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| 摘 要： | 提出了一种基于二元树复小波变换和神经网络的半盲离焦图像复原算法，首先利用二元树复小波变换和特征值分解提取图像的特征矢量，将该矢量用来训练小波神经网络，利用训练好的网络估计离焦模糊参数.由此获得点扩展函数，用Wiener滤波完成图像的复原.实验结果表明，该方法能有效地估计离焦模糊参数和复原模糊图像.
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| 关 键 词： | 离焦图像复原 二元树复小波变换 特征值分解 小波神经网络 Wiener滤波 |
| 文章编号： | 0490-6756（2007）02-0316-05 |
| 修稿时间： | 2006-12-12 |
Semi-blind defocused image restoration with dual-tree complex wavelet transform |
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| LI Zheng,SU Li-yun,YAN Jian and JU Sheng-gen. Semi-blind defocused image restoration with dual-tree complex wavelet transform[J]. Journal of Sichuan University (Natural Science Edition), 2007, 44(2): 316-320 |
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| Authors: | LI Zheng SU Li-yun YAN Jian JU Sheng-gen |
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| Affiliation: | 1. College of Computer Science, Sichuan University, Chengdu 610064, China; 2. College of Mathematics, Sichuan University, Chengdu 610064, China; 3. College of Microeletronics and Solid-State Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China |
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| Abstract: | A novel semi-blind defocused image restoration technique is proposed, which is based on dual-tree complex wavelet transform and wavelet neural network(WNN).In this technique,firstly a wavelet neural network is trained in complex wavelet domain to estimate defocus parameter.After obtaining the point spread function (PSF) parameter,Wiener filtering is adopted to complete the restoration.The authors experimentally illustrate its performance on simulated data.Results show that the proposed PSF parameter estimation technique and the defocused image restoration are effective. |
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| Keywords: | defocused image restoration dual-tree complex wavelet transform singular value decomposition wavelet neural network wiener filtering |
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