Full Polarimetric SAR Classification Based on Four-component Decomposition Model and Scattering Parameters

Abstract:

Based on the analysis of typical polarized target decomposition and classification,the paper proposes a new scheme for iterative classification of polarimetric SAR image,which blends the outcomes of Yamaguchi decomposition and H/α decomposition.This technique extracts four decomposition coefficients of four scattering mechanism components through Yamaguchi decomposition,the scattering entropy and angle through H/α decomposition first; then the initial classification of the POLSAR images is done by the combination of the 6 parameters mentioned above.The final result is obtained by iterative classification due to coherence scattering matrix following wishart distribution.The classification performance improved,better effectiveness and less amount of computation is demonstrated by the experimental results of polarimetric SAR data.

Key words:polarized synthetic aperture radar; imaging classification; Yamaguchi decomposition; scattering entropy; scattering angle