GVIP Journal    

ICGST

Issue(6)

GVIP

Smoothing of coefficients in wavelet domain for speckle reduction in Synthetic Aperture Radar images
 
SAOCOM Mission, National Commission of Space Activities (CONAE) 751 P. Colon Ave., C1063ACH Buenos Aires, Argentina
 
Abstract:
In this paper, an efficient method for removing speckle (in wavelet domain) of unknown variance from Synthetic Aperture Radar (SAR) images is described. The method is based on a smoothing of the coefficients of the highest wavelet subbands. Specifically, we decompose the speckled SAR image into wavelet subbands, apply directional smoothing (DS) within each high subband, and reconstruct a SAR image from the modified detail coefficients. Despeckling results compare favourably with most methods in use at the moment.
 
Keywords: Directional smoothing, shrinkage, speckle, synthetic aperture radar, thresholding, wavelets.
 
Biography:

Prof. Mario Mastriani was born in Buenos Aires, Argentina on February 1, 1962. He is Professor of Digital Signal Processing and Digital Image Processing of National Technological University (UTN). He is working in the speckle filter of the first synthetic aperture radar (SAR) satellite of SAOCOM Mission, National Commission of Space Activities (CONAE), Buenos Aires, Argentina. He published 34 papers. He is a currently reviewer of IEEE Transactions on Neural Networks, Signal Processing Letters, Transactions on Image Processing, Transactions on Signal Processing, Communications Letters, Transactions on Geoscience and Remote Sensing, Transactions on Medical Imaging, Transactions on Biomedical Engineering, Transactions on Fuzzy Systems; and Springer-Verlag Journal of Digital Imaging. He (M’05) became a member (M) of ENFORMATIKA in 2004, and a member of the Scientific Committee in 2005. His areas of interest include Digital Signal Processing, Digital Image Processing, wavelets and Neural Networks.

Prof. Alberto E. Giraldez was born in Trelew,  Chubut, Argentina on January 2, 1949. He received his B.S. degree, and Ph.D. in Physics in 1971 and 1975 respectively, from La Plata, University, Argentina. He is Professor of Electromagnetism of Buenos Aires Institute of Technology (ITBA). He is the scientific manager of the first synthetic aperture radar (SAR) satellite of SAOCOM Mission, National Commission of Space Activities (CONAE), Buenos Aires, Argentina. He published 71 papers. He was a reviewer of Radio Science (American Geophysical Union), and Annales Geophysicae (European Geophysical Society). He is the manager of the Ionosferic Laboratory (LIARA) of Argentine Navy from 1980. He is the president of the work interim group 6/8 of the International Radiocommunication Consultive Committee (IRCC) of the International Telecommunication Union (ITU) elect in 1978, and with command renovated in 1982 and 1986 for the study of "Anomalous propagation in Very High Frequency for reflections in the Ionosphere". His areas of interest include Synthetic Aperture Radar, Digital Signal Processing, Radiopropagation and Electromagnetic Compatibility, and Radar Technology.

BibTex:

@ARTICLE{P1150517003,

AUTHOR = {M. Mastriani, A. E. Giraldez},

TITLE = {Smoothing of coefficients in wavelet domain for speckle reduction in Synthetic Aperture Radar images},

JOURNAL = {ICGST International Journal on Graphics, Vision and Image Processing},

YEAR = {2005},

MONTH = {June},

VOLUME = {5},

ISSUE = {6},

PAGES = {1--8}

}

( Full paper 1.08 KB)