EFFICIENT STRAYEGY SELECTION OF PERMANENT AND DISTRIBUTED SCATTERERS IN ON-URBAN AREAS

摘要

The differential interferometry PSI is based on the identification of targets exhibiting good phase stability PS. These targets are available in urban areas, but less available in non-urban areas. For this purpose, the statistically homogeneous pixels DS, permit to this technique to be extended for the non-urban areas. Knowing that homogeneous areas are favourable for a development of the speckle noise, an adaptive filtering is applied to these areas without compromising the phase stability of PS. In this context, we propose in this paper a PS and DS selection strategy based on two steps: first, the PS are selected and isolated using coherence maps, which will allow us to exclude theme from filtering operation. In the second step, the DS selection is processed.rnThis approach has been tested on SAR images acquired by sensors ERS1/2 corresponding to the area of Haoud el Barkaoui, Ouargla in Algeria.