结合噪声去除的极大似然图像复原

doi:10.13229/j.cnki.jdxbgxb201504048

吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (4): 1360-1366.doi: 10.13229/j.cnki.jdxbgxb201504048

结合噪声去除的极大似然图像复原

姜超¹, 耿则勋¹, 刘立勇², 潘映峰³

1.解放军信息工程大学地理空间信息学院,郑州 450052;
2.中国科学院国家天文台,北京 100012;
3. 中国人民解放军61175部队,南京 210049

收稿日期:2014-03-24 出版日期:2015-07-01 发布日期:2015-07-01
作者简介:姜超(1985-),男,博士研究生.研究方向:数字图像处理.E-mail:jiangchao19850429@126.com
基金资助:
“863”国家高技术研究发展计划项目(2012AA7032031D); 国家自然科学基金项目(11373043)

Maximum likelihood image restoration combined with image denoising

JIANG Chao¹, GENG Ze-xun¹, LIU Li-yong², PAN Ying-feng³

1.PLA Information Engineering University, Zhengzhou 450052, China;
2.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012;
3.Troops 61175 of PLA, Nanjing 210049, China

Received:2014-03-24 Online:2015-07-01 Published:2015-07-01

摘要/Abstract

摘要： 基于混合噪声模型的极大似然算法不仅没有充分考虑迭代过程中的噪声影响,而且假定点扩散函数(PSF)已知且不随迭代过程变化,从而导致复原过程不稳定。在图像含噪且PSF未知的情况下,提出以去噪算法作为预处理手段,同时将PSF参数估计引入极大似然算法迭代过程并随迭代过程动态更新,最后将估计的PSF代入维纳滤波以提高复原图像的质量。实验结果证明,本文复原图像质量有明显改善,表明该算法具有较强的稳定性和抗噪声能力,是一种有效的图像复原方法。

关键词: 摄影测量与遥感技术, 图像复原, 混合噪声模型, 图像去噪, 点扩散函数, 极大似然

Abstract: In the maximum likelihood algorithm proposed by Benvenuto base on mixed noise model, the noise effect during iteration is not taken into consideration and the Point Spread Function (PSF) is assumed to be known and unchanged. This leads to the unstability of the image restoration. Under the condition of noise existence and PSF unknown, an image denoising algorithm is proposed as preprocessing, and the parameter estimation of PSF is introduced into iteration of the maximum likelihood and is dynamically updated. Finally, the Wiener filter with estimated PSF is utilized to improve the quality of the restored image. Experiment result demonstrate that the quality of the restored image is obviously improved, which proves the stability and noise resistance of the proposed algorithm.

Key words: photogrammetry and remote sensing technology, image restoration, mixed noise model, image denoising, point spread function, maximum likelihood

中图分类号:

TP751

姜超, 耿则勋, 刘立勇, 潘映峰. 结合噪声去除的极大似然图像复原[J]. 吉林大学学报(工学版), 2015, 45(4): 1360-1366.

JIANG Chao, GENG Ze-xun, LIU Li-yong, PAN Ying-feng. Maximum likelihood image restoration combined with image denoising[J]. 吉林大学学报(工学版), 2015, 45(4): 1360-1366.

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结合噪声去除的极大似然图像复原

Maximum likelihood image restoration combined with image denoising

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