Wavelet-based speckle reduction in synthetic aperture radar images
Seisuke Fukuda, H. Hirosawa · Electronics and Communications in Japan (Part III Fundamental Electronic Science) · 1997
This paper proposes a wavelet-based approach to reducing speckle in synthetic aperture radar (SAR) images. The proposed approach, based on multiresolution analysis with a two-dimensional wavelet transform, aims at smoothing speckle without blurring edges. When an image is transformed by wavelets, edge information appears in detail images. The essence of the method is reducing the power of pixels without edge information in detailed images of each wavelet domain and reconstructing the image by inverse wavelet transform. This approach gives a high ability to smooth speckle and preserve edges in simulations and has been satisfactorily applied to real SAR images. © 1997 Scripta Technica, Inc. Electron Comm Jpn Pt 3, 80(9): 29–36, 1997