Table 2.

Quantitative comparison of different filters by all possible complex correlations on the marked region 4 in Figure 7a.

Complex Correlation	Original	Refined Lee	IDAN	Pretest	NL-SAR	ANLM
$\left|{\rho }_{hh+vv,hh-vv}\right|$	0.126	0.130	0.126	0.141	0.132	0.128
$arg\left({\rho }_{hh+vv,hh-vv}\right)$	0.188	0.171	0.188	0.239	0.213	0.224
$\left|{\rho }_{hh+vv,hv}\right|$	0.036	0.033	0.036	0.034	0.033	0.034
$arg\left({\rho }_{hh+vv,hv}\right)$	2.961	2.735	2.961	2.582	2.680	2.613
$\left|{\rho }_{hh-vv,hvv}\right|$	0.019	0.013	0.019	0.012	0.012	0.013
$arg\left({\rho }_{hh-vv,hv}\right)$	−2.146	−2.271	−2.146	−2.434	−2.036	−2.220