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.
['Seisuke Fukuda', 'Haruto Hirosawa']
Smoothing effect of wavelet-based speckle filtering: the Haar basis case