In this study, the effects of speckle filtering in polarimetric Synthetic Aperture Radar (SAR) imagery is investigated for shoreline extraction purposes. In particular, non-local (NL) means filters paradigm is applied to polarimetric SAR measurements in order to derive exact shoreline positions in complex scenarios as sandy beaches. As a showcase, shoreline extraction is undertaken, according to the polarimetric algorithm proposed in [1], from a C-band Radarsat-2 SAR scene covering the historical site of Monasterace (Calabria region, Italy). A preliminary analysis on how to set-up the parameters of the non-local means filter used to reduce speckle noise is undertaken. In addition, in order to evaluate the performance of the non-local means filters to be exploited for polarimetric SAR-based shoreline extraction purposes, a fair comparison with reference polarimetric speckle filters widely used in literature, i. e., the boxcar and the refined Lee filter, is made in terms of accuracy by means of reference Global Positioning System samples considered as ground truth. The NL means speckle filters was shown to outperform the others in terms of accuracy and stability.

Analysis of Local-and Non-Local Filters for Multi-Polarization SAR Coastline Extraction Applications

Urciuoli A.;Buono A.;Nunziata F.;Migliaccio M.
2019

Abstract

In this study, the effects of speckle filtering in polarimetric Synthetic Aperture Radar (SAR) imagery is investigated for shoreline extraction purposes. In particular, non-local (NL) means filters paradigm is applied to polarimetric SAR measurements in order to derive exact shoreline positions in complex scenarios as sandy beaches. As a showcase, shoreline extraction is undertaken, according to the polarimetric algorithm proposed in [1], from a C-band Radarsat-2 SAR scene covering the historical site of Monasterace (Calabria region, Italy). A preliminary analysis on how to set-up the parameters of the non-local means filter used to reduce speckle noise is undertaken. In addition, in order to evaluate the performance of the non-local means filters to be exploited for polarimetric SAR-based shoreline extraction purposes, a fair comparison with reference polarimetric speckle filters widely used in literature, i. e., the boxcar and the refined Lee filter, is made in terms of accuracy by means of reference Global Positioning System samples considered as ground truth. The NL means speckle filters was shown to outperform the others in terms of accuracy and stability.
978-1-7281-3815-2
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11367/82152
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 2
  • ???jsp.display-item.citation.isi??? ND
social impact