Title :
Smoothing effect of wavelet-based speckle filtering: the Haar basis case
Author :
Fukuda, Seisuke ; Hirosawa, Haruto
Author_Institution :
Inst. of Space & Astron. Sci., Kanagawa, Japan
fDate :
3/1/1999 12:00:00 AM
Abstract :
The smoothing effect of the wavelet-based speckle filtering that the authors proposed is investigated. The filtering reduces the amplitude of wavelet coefficients, and a theoretical investigation with the Haar basis derives a functional relation between the ENL and two parameters: the wavelet level and the degree of the amplitude reduction
Keywords :
Haar transforms; geophysical signal processing; geophysical techniques; radar imaging; radar signal processing; remote sensing by radar; speckle; synthetic aperture radar; terrain mapping; wavelet transforms; Haar basis case; SAR; geophysical measurement technique; land surface; radar remote sensing; smoothing effect; speckle filtering; speckle reduction; synthetic aperture radar; terrain mapping; wavelet; wavelet coefficient amplitude; Adaptive filters; Computer aided software engineering; Filtering; Multiresolution analysis; Radar scattering; Rayleigh scattering; Smoothing methods; Speckle; Wavelet analysis; Wavelet coefficients;
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
