Bilateral filtering of PolSAR data based on Riemannian metrics

In this paper we propose a new speckle filter for polarimetric SAR data based on the bilateral filter. We also study the use of Riemannian metrics related to the Hermitian nature of the complex covariance matrices. The approach is validated over synthetic and experimental data. The method achieves a strong smoothing in homogeneous areas while preserving both polarimetric and spatial information.