Title :
Wavelet footprints for speckle reduction of SAR images
Author :
Ulfarsson, Magnus Orn ; Sveinsson, Johannes R. ; Benediktsson, Jon Atli
Author_Institution :
Dept. of Electr. & Comput. Eng., Iceland Univ., Reykjavik, Iceland
Abstract :
Wavelet footprints, proposed by Dragotti (2002), are used for speckle reduction of synthetic aperture radar (SAR) images. Wavelet footprints contain all wavelet coefficients associated with a singular structure of a signal. Consequently, the dependency across scales that is inherent in wavelet transformation is eliminated. In the present paper, coefficients of wavelet footprints are thresholded with hard 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; image denoising; radar detection; radar imaging; speckle; synthetic aperture radar; SAR based recognition; SAR images; denoising method; detection; hard thresholding; speckle reduction; synthetic aperture radar images; wavelet footprints; Additive noise; Discrete wavelet transforms; Matching pursuit algorithms; Noise reduction; Pursuit algorithms; Speckle; Synthetic aperture radar; Wavelet coefficients; Wavelet domain; Wavelet transforms;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2003. IGARSS '03. Proceedings. 2003 IEEE International
Print_ISBN :
0-7803-7929-2
DOI :
10.1109/IGARSS.2003.1295372
