全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

复小波域维纳滤波与偏微分扩散相结合的图像去噪方法

DOI: 10.11834/jig.20090511

Keywords: 双树复数小波,方向窗维纳滤波,偏微分方程,扩散函数,图像去噪

Full-Text   Cite this paper   Add to My Lib

Abstract:

针对图像噪声的去除,提出了一种基于复数小波域上的多方向窗维纳滤波与偏微分方程保持边缘细节相结合的方法。针对小波域维纳滤波的方向性差,去噪后图像容易产生哑铃效应,该方法首先进行双树复数小波变换,集中6个方向上的图像信号能量,之后,再在该6个方向上进行方向维纳滤波,对图像进行初步去噪,再以此引导偏微分方程中的扩散函数,实现各项异性进行扩散,最大限度地在保持图像细节的同时,去除噪声。实验结果表明,该方法的峰值信噪比,以及视觉质量都较复小波去噪或各项异性非线性扩散去噪方法有明显的改善。

References

[1]  Perona P, Malik J. Scale-space and edge detection using anisotiop diffusion[J]. IEEE Transactions on Pattern Analysis and Machine In telligence, 1990,12 ( 7 ) :629- 639.
[2]  Donoho D L, Johnstone I M. Threshold selection foi wavelet shrinkane of noisy data [ A ] . In: Proceedinns of 16th Annual International Conference of the IEEE[C], Pscatawav, N J, USA, 1994,(1): 24-25.
[3]  Li X, Orchard M T. Spatially adaptive image denoising under overcom plete expansion [ A ]. In: Proceedings of IEEE Int ernational Conference on Image Process [C], Vancouver BC, Canada 2000: 300-303.
[4]  KingsSury N G. Complcx wavclcts for shift invariant analysis and filtering of signals [J] .Applicd and Computational Harmonic Analysis, 2001,10(3) : 234-253.
[5]  Kazubek M. Wavelet domain image denoising by thresholding and wiener filtering[J]. IEEE Signal Processing Letters, 2003, 10 (11 ) : 324-326.
[6]  Alvarez L,Lions P L, Morel J M. Image selective smoothing and edge detection by nonlinear diffusion [J] . SIAM, J-NumeticalAnalysis,1992,29(3) :845-866.
[7]  KingsSury N G. Imagc proccssing with complex wavelet[J]. Philosophical Transactions of the Royal Society, 1999,357(9): 543-560.
[8]  Shui Peng-lang. Image denoising algorithm via doubly local wiener filtering with directional windows in wavelet domain[J]. IEEE Signal Processing Letters, 2005,12(10) :681-684.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133