Journal of University of Chinese Academy of Sciences >
A Regularized Anisotropic Diffusion for Speckle Reducing
Received date: 2004-04-28
Revised date: 2004-05-25
Online published: 2005-01-15
Speckle reducing anisotropic diffusion (SRAD) algorithm still has disadvantages. Firstly , the diffusion coefficient is not a convex function , which leads to an unstable solution. At the second point , SRAD is anisotropy even in the homogeneous areas , this will depress the ability of reducing speckle. In this paper we systematically an- alyze the problem mentioned above and propose a new diffusion coefficient based on the edge-preserving regulariza- tion method. We also construct a new anisotropic diffusion module , R-SRAD , which is more reasonable. The ex- perimental results show that our R-SRAD is more effective in comparison with the SRAD.
Key words： anisotropic diffusion; speckle; PDE; denoising
Qiao Ming , Wang Xinlou , Zou Mouyan . A Regularized Anisotropic Diffusion for Speckle Reducing[J]. Journal of University of Chinese Academy of Sciences, 2005 , 22(1) : 24 -29 . DOI: 10.7523/j.issn.2095-6134.2005.1.004
[1] Lee JS. Speckle suppression and analysis for synthetic aperture radar. Opt . Eng. , 1986 , 25 (5) : 636～643
[2] Lee JS. Digital image enhancement and noise filtering by using local statistics. IEEE Trans . Pattern Anal . Machine Intell . , 1980 , PAM122
[3] Kuan DT, Sawchuk AA , Strand TC , et al . Adaptive restoration of images with speckle. IEEE Trans . Acoust . , Speech , Signal Processing ,1987 , ASSP235 : 373～383
[4] Frost VS , Stiles JA , Shanmugan KS , et al . A model for radar images and its application to adaptive digital filtering of multiplicative noise. IEEETrans . Pattern Anal . Machine Intell . , 1982 , PAMI24 : 157～165
[5] Lopes A , Touzi R , Nezry E. Adaptive speckle filters and scene heterogeneity. IEEE Trans . Geosci . Remote Sensing , 1990 , 28 : 992～1000
[6] Perona P , Malik J . Scale space and edge detection using anisotropic diffusion. IEEE Trans . Pattern Anal . Machine Intell . , 1990 , 12 : 629～639
[7] Yu YJ , Scott TA. Speckle reducing anisotropic diffusion. IEEE Trans . Image Processing , 2002 , 11 (11) : 1260～1270
[8] Charbonnier P , Blanc2Feraud L , Aubert G, et al . Deterministic edge2preserving regularization in computed imaging. IEEE Trans . Image Proc. ,1997 , 6 (2) : 298～311
[9] Teboul S , Blanc2Feraud L , Aubert G, et al . Variational approach for edge2preserving regularization using coupled PDE’s. IEEE Trans . ImageProc. , 1998 , 7 (3) : 387～397
[10] Koenderink JJ . The structure of images. Biological Cybernetics , 1984 , 50 : 363～370
[11] Zou MY. Deconvolution and Signal Recovery. Beijing : National Defense Industry Press , 2001
附中文参考文献
[11] 邹谋炎. 反卷积和信号复原. 北京:国防工业出版社, 2001
/
| 〈 |
|
〉 |