Wishart-H/Alpha Classification Based on Optimal Coherence and Polarimetric Span

It's suitable to distinguish the scattering properties of different objects basing on Wishart-H/Alpha classification.However,various scattering mechanisms are merged when class clustering,which confuse the road and the bare soil.In this paper,an improved scheme is performed which segments the optimal-coherence and Polarimetric-Span 2D-histogram to subdivide the road and bare soil after Wishart-H/Alpha classification.Finally,the experiment on domestic dual-antenna X band POLINSAR datum proves that proposed method can separate roads and bare soil effectively.