Mr. Boussad Azmedroub Profile

Boussad Azmedroub

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Proceedings Article | 14 February 2015 Paper

The effect of desying angle on polarimetric SAR image decomposition

Boussad Azmedroub, Mounira Ouarzeddine, Boularbah Souissi

Proceedings Volume 9445, 94450R (2015) https://doi.org/10.1117/12.2180747

KEYWORDS: Scattering, Polarimetry, Synthetic aperture radar, Radar, RGB color model, Polarization, Backscatter, Composites, Satellites, Data acquisition

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Polarimetric image decomposition is nowadays among the most important applications of multi-polarization, multifrequency SAR radar images. With the growth of new satellite missions equipped with fully polarimetric modes there is a strong need for accurate methods and for new approaches to handle the huge data coming from different airborne and space borne missions and to understand better the several and different mechanisms that occur in a resolution cell. We are interested in this paper in polarimetric SAR image decomposition that makes a comparison between Yamaguchi decomposition called also the four component decomposition before and after image compensation from the orientation angle. This latter affects directly the scattering mechanisms and induces errors in the decomposition results especially in urban area where there are complex structures. We demonstrate with power profiles and with RGB color composite images that the volume scattering type decreases drastically after deorientation, whereas the helix scattering type is not sensitive to orientation. The test site is situated in the north of Algiers city and the satellite data is a fully polarimetric acquisition in C band. Results are in a high agreement with Google earth optical image.

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