Deconvolution by thresholding in mirror wavelet bases

被引:35
作者
Kalifa, J [1 ]
Mallat, S
Rougé, B
机构
[1] Ecole Polytech, Ctr Math Appl, F-91128 Palaiseau, France
[2] NYU, Courant Inst Math Sci, New York, NY 10012 USA
[3] Ctr Natl Etud Spatiales, F-31055 Toulouse, France
基金
美国国家科学基金会;
关键词
deconvolution; inverse problem; thresholding; wavelet packets;
D O I
10.1109/TIP.2003.810592
中图分类号
TP18 [人工智能理论];
学科分类号
081104 ; 0812 ; 0835 ; 1405 ;
摘要
The deconvolution of signals is studied with thresholding estimators that decompose signals in an orthonormal basis and threshold the resulting coefficients. A general criterion is established to choose the orthonormal basis in order to minimize the estimation risk. Wavelet bases are highly sub-optimal to restore Signals and images blurred by a low-pass filter whose transfer function vanishes at high frequencies. A new orthonormal basis called mirror wavelet basis is constructed to minimize the risk for such deconvolutions. An application to the restoration of satellite images is shown.
引用
收藏
页码:446 / 457
页数:12
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