Disclosed is a three-dimensional imaging method for a Polarimetric
Interferometric Synthetic Aperture Radar (Pol-In-SAR) based on the polarimetric
data integration, which belongs to the Polarimetric
radar Interferometric measurement
data processing technology field. The data is read in and two scattering vectors k1 and k2 are structured to each scattering unit; eigenvalue
decomposition is performed on the matrix K1 K1-K2 K2 and three eigenvalues are obtained: Lambada1>0, Lambada1>0 and Lambada3=0; values of formula(1) can be respectively calculated so as to determine which condition the value belongs to; if in condition 1, w=w<(1)> can be calculated according to formula (6); if in condition 2, w=w<(2)> can be calculated according to formula (14); and then Phi[s]=arg(wk1k2w)can be calculated. An enhanced complex image can be obtained according to formula 3); the matrix
Omega12=> is calculated; and then Phi[m]=arg(w[
Omega12]w) can be calculated according to formula 22). The flat-earth effect is removed on the obtained whole
phase map (
single view or multi-view); and
phase unwrapping is performed by using
branch-
cut algorithm. The invention has wide application range, and the calculating time is smaller than that of the interference optimization method; and the integrated phase quality is better than that of interference optimization method, the phase quality can be always enhanced despite the original
signal level, thereby establishing a fine basis for generating accurate
digital elevation model (DEM) in the future.