Scattering-Based Nonlocal Means SAR Despeckling

Sensitivity analysis of a scattering-based nonlocal means Despeckling Algorithm

“…In Di Martino et al (2016), the authors proposed an adaptive scattering-based version of the PPB filter originally proposed in Deledalle et al (2009) and named it SB-PPB. The key feature of the SB-PPB filter is the ability to take into account the scattering behavior of the imaged surface.…”

“…Starting with the simple spatial multilook approach, numerous techniques and approaches have been developed so far Deledalle et al (2009), Parrilli et al (2012), Di Martino et al (2015), Di Martino et al (2016), Di Martino et al (2016a). Most techniques are based on the straightforward idea of averaging similar pixels (or patches, i.e.…”

“…the scattering mechanisms, involved in SAR imagery. The authors recently introduced a novel scattering-based despeckling algorithm Di Martino et al (2015) and applied scattering concepts to PPB Di Martino et al (2016) and SARBM3D Di Martino et al (2016a). It is noticeable that, at least in principle, any despeckling algorithm coping with SAR intensity models could take advantage of scattering issues, inserting physicalbased concepts into the filter.…”

“…The scattering-based PPB, named SB-PPB in Di Martino et al (2016), accounts for the scattering behavior of the surface via a proper scattering model suitable for natural surfaces. In particular, the surface backscattering coefficient (or Normalized Radar Cross Section, NRCS) is estimated from the surface topography and inserted within the filter as a kind of a priori information.…”

“…Accordingly, a Digital Elevation Model (DEM) of the considered scene must be available to apply the SB-PPB filter. The scattering-based technique proposed by the authors exhibits better performance w. r.t. the state of the art, both in terms of speckle reduction and details preservation Di Martino et al (2016).…”