# `RVI` (Radar Vegetation Index)

This functionality computes the radar vegetation index for dual polarimetric (HH | HV), (VV | VH) SAR data. The required input and the computed output are as follows:

    input : input_c2_folder, window_size
    output: RVI_dp.bin

The formulation of RVI is as follows:

\[\text{RVI}_{dp} = \frac{4 \times \sigma^\circ_{\text{XY}}}{\sigma^\circ_{\text{XX}}+\sigma^\circ_{\text{XY}}}\]

where, \(\sigma^\circ_{\text{XX}}\) is co-pol backscatter intensity and \(\sigma^\circ_{\text{XY}}\) is corss-pol backscatter intensity