Title :
Speckle reduction of SAR images in the curvelet domain
Author :
Ulfarsson, Magnus Orn ; Sveinsson, Johannes R. ; Benediktsson, Jon Atli
Author_Institution :
Dept. of Electr. & Comput. Eng., Iceland Univ., Reykjavik, Iceland
Abstract :
Curvelet transform (CT), proposed by E. Candes et al. (1999), is used for speckle reduction of SAR images. The CT is useful for speckle reduction through its subband images and the speckle reduction is obtained by thresholding the subband-image coefficients of the digitized SAR images. Two thresholding methods are used; hard thresholding and soft thresholding. The denoising method shows great promise for speckle removal and hence provides good detection performance for SAR based recognition.
Keywords :
geophysical signal processing; geophysical techniques; radar imaging; remote sensing by radar; speckle; synthetic aperture radar; terrain mapping; transforms; SAR; SAR images; curvelet domain; curvelet transform; denoising; geophysical measurement technique; hard thresholding; land surface; radar imaging; radar remote sensing; soft thresholding; speckle reduction; subband images; subband-image coefficients; synthetic aperture radar; terrain mapping; threshold; thresholding; Additive noise; Chaos; Computed tomography; Continuous wavelet transforms; Discrete wavelet transforms; Noise reduction; Speckle; Wavelet coefficients; Wavelet domain; Wavelet transforms;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2002. IGARSS '02. 2002 IEEE International
Print_ISBN :
0-7803-7536-X
DOI :
10.1109/IGARSS.2002.1025025
