Title :
SAR image restoration based on the alpha-stable prior in the wavelet domain
Author :
Xu Xin ; Peng Yijin ; Zhou Wanbin
Author_Institution :
Signal Process. Lab., Wuhan Univ., Wuhan
Abstract :
Synthetic Aperture Radar (SAR) image is generally degraded by multiplicative Speckle. In this paper, an algorithm for SAR image restoration in the wavelet domain is presented. The Alpha-stable distribution is utilized to model the wavelet coefficients of the SAR image based on their statistic characteristics. A closed-form expression of the Bayesian filter is obtained. The experimental results indicate that the proposed algorithm has capability both in Speckle suppression and in details preservation.
Keywords :
image restoration; radar imaging; synthetic aperture radar; wavelet transforms; Bayesian filter; SAR image restoration; Speckle suppression; alpha-stable distribution; closed-form expression; multiplicative Speckle; synthetic aperture radar; wavelet domain; Bayesian methods; Closed-form solution; Degradation; Filters; Image restoration; Speckle; Statistical distributions; Synthetic aperture radar; Wavelet coefficients; Wavelet domain; Alpha-stable; SAR; Speckle; Statistical modeling; Wavelet;
Conference_Titel :
Signal Processing, 2008. ICSP 2008. 9th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2178-7
Electronic_ISBN :
978-1-4244-2179-4
DOI :
10.1109/ICOSP.2008.4697330
