| 基于小波的迭代盲图像恢复新算法 |
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| 引用本文： | 朱亚平,沈庭芝,白杨.基于小波的迭代盲图像恢复新算法[J].北京理工大学学报,2006,26(9):828-830. |
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| 作者姓名： | 朱亚平 沈庭芝 白杨 |
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| 作者单位： | 北京理工大学,信息科学技术学院电子工程系,北京,100081;北京理工大学,信息科学技术学院电子工程系,北京,100081;北京理工大学,信息科学技术学院电子工程系,北京,100081 |
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| 摘 要： | 针对迭代盲反卷积算法中解的唯一性和收敛性不确定问题,提出了基于小波的迭代盲图像恢复新算法.该算法用基于奇异值分解和压缩滤波方法对降质图像进行预处理,在初始化估计后对图像进行小波变换,用局部高斯模型刻画图像小波系数的概率分布,并作为先验约束加入到迭代算法中.仿真结果表明,新算法在保持图像边缘特性的基础上,峰值信噪比改进量比原算法增加约3 dB,对解的唯一性和收敛性也有一定改善.
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| 关 键 词： | 迭代盲反卷积 盲图像恢复 小波变换 奇异值分解 |
| 文章编号： | 1001-0645（2006）09-0828-04 |
| 收稿时间： | 2005-06-09 |
| 修稿时间： | 2005-06-09 |
Wavelet-Based Iterative Blind Deconvolution Algorithm for Image Restoration |
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| ZHU Ya-ping,SHEN Ting-zhi and BAI Yang.Wavelet-Based Iterative Blind Deconvolution Algorithm for Image Restoration[J].Journal of Beijing Institute of Technology(Natural Science Edition),2006,26(9):828-830. |
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| Authors: | ZHU Ya-ping SHEN Ting-zhi and BAI Yang |
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| Institution: | Department of Electronic Engineering, School of Information Science and Technology, Beiiing Institute of Technology, Beijing 100081, China |
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| Abstract: | To cope with the uncertainty of the solution's uniqueness and convergence in the iterative blind deconvolution(IBD) method,a novel wavelet-based iterative blind image restoration algorithm is proposed.A singular value decomposition(SVD) and compression-based filtering method is used for pretreatment,discrete wavelet transform(DWT) is made after the initial image estimate,and local Gaussian model(LGM) is used as a priori restriction added to the IBD method.Simulation results showed that,the combination of these techniques can perform better about 3?dB(P_(SNR)) than the original IBD method in recovering images,with edge information well reserved.At the same time,the uniqueness and convergence properties of IBD are improved. |
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| Keywords: | iterative blind deeonvolution blind image restoration wavelet transform singular value decomposition |
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