Speckle reduction of SAR images in the curvelet domain
Magnus Orn Ulfarsson, Jóhannes R. Sveinsson, Jón Atli Benediktsson · 2003
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.