Contribution of the fractal dimension to multiscale adaptive filtering of SAR imagery
Mickaël Germain, G.B. Bénié, J.-M. Boucher, Samuel Foucher, Ko Fung, Kalifa Goı̈ta · IEEE Transactions on Geoscience and Remote Sensing · 2003
Radar images can show great variability from pixel to pixel, which is an obstacle to effective processing. This variability, due to speckle created by the radar wave coherence, necessitates the use of more adapted filters. Previous studies have shown that multiresolution wavelet analysis yields better results but produces artefacts due to multiscale decomposition. This paper proposes a method that reduces these effects by introducing the fractal dimension. The resultant filter combines wavelet decomposition and variance change model based on the level of variance estimated by studying the fractal dimension of the image.