Title :
Block-wise bivariate shrinkage functions for speckle reduction
Author :
Xiaohua, Zhang ; Zhichao, Li ; Jiao, L.C. ; Yang, Zhang
Author_Institution :
Key Lab. of Intell. Perception & Image Understanding of the Minist. of Educ. of China, Xidian Univ., Xi´´an, China
Abstract :
The reduction of speckle in SAR image is important for SAR images processing. In this paper, we present an efficient despeckle algorithm based on dual-tree complex wavelet transform (DTCWT) and bivariate shrinkage functions. A block-wise despeckle method is proposed to exploit the dependence between the coefficient and its neighbours. Experiment results demonstrate that the proposed algorithm shows great advantage in speckle reduction over the original bivariate shrinkage algorithm.
Keywords :
radar imaging; synthetic aperture radar; wavelet transforms; DTCWT; SAR image processing; block-wise bivariate shrinkage function; block-wise despeckle method; dual-tree complex wavelet transform; speckle reduction; Discrete wavelet transforms; Noise; Noise reduction; Satellite broadcasting; Speckle; DTCWT bivariate shrinkage block-wise;
Conference_Titel :
Radar (Radar), 2011 IEEE CIE International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-8444-7
DOI :
10.1109/CIE-Radar.2011.6159863
