We illustrate, through a sample application to a difficult landslide test site, the use of a novel method to detect potentially stable objects in Persistent Scatterers SAR Interferometry (PSI). Conventional PSI processing involves selecting first-guess potential stable objects, called PS Candidates (PSC), through thresholding of the amplitude dispersion index. This method can lead, in applications to scenes characterized by scarce urbanization, to very low PSC numbers, insufficient for a successful subsequent phase analysis if their spatial distribution is very sparse. Our classification-based approach relies on the proven fact that urban areas are more likely to contain PS pixels than any other land-cover class. Therefore, using pixels belonging to the urban land-cover class as PSC is a convenient way of increasing the number of initial fiducial points while keeping false alarm probabilities to reasonable levels. Results show that PSC belonging to the urban class, selected through simple external classification algorithms, lead to more consistent results for the final PS, both in terms of spatial density, and of reliability of displacement series.

Land-cover classification-based persistent scatterers identification for peri-urban applications / Refice, A.; Bovenga, F.; Nutricato, R.; Chiaradia, Mt.; Wasowski, J.. - STAMPA. - (2005), pp. 1525615.2668-1525615.2671. (Intervento presentato al convegno 2005 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2005 tenutosi a Seoul, South Korea nel July 25-29, 2015) [10.1109/IGARSS.2005.1525615].

Land-cover classification-based persistent scatterers identification for peri-urban applications

Nutricato, R.;Chiaradia, MT.;
2005-01-01

Abstract

We illustrate, through a sample application to a difficult landslide test site, the use of a novel method to detect potentially stable objects in Persistent Scatterers SAR Interferometry (PSI). Conventional PSI processing involves selecting first-guess potential stable objects, called PS Candidates (PSC), through thresholding of the amplitude dispersion index. This method can lead, in applications to scenes characterized by scarce urbanization, to very low PSC numbers, insufficient for a successful subsequent phase analysis if their spatial distribution is very sparse. Our classification-based approach relies on the proven fact that urban areas are more likely to contain PS pixels than any other land-cover class. Therefore, using pixels belonging to the urban land-cover class as PSC is a convenient way of increasing the number of initial fiducial points while keeping false alarm probabilities to reasonable levels. Results show that PSC belonging to the urban class, selected through simple external classification algorithms, lead to more consistent results for the final PS, both in terms of spatial density, and of reliability of displacement series.
2005
2005 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2005
0-7803-9050-4
Land-cover classification-based persistent scatterers identification for peri-urban applications / Refice, A.; Bovenga, F.; Nutricato, R.; Chiaradia, Mt.; Wasowski, J.. - STAMPA. - (2005), pp. 1525615.2668-1525615.2671. (Intervento presentato al convegno 2005 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2005 tenutosi a Seoul, South Korea nel July 25-29, 2015) [10.1109/IGARSS.2005.1525615].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/18519
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