Goldstein Phase Filtering Operator
Phase filtering is a
preprocessing technique that greatly reduces the residues in the later
on phase unwrapping step and enhances the phase unwrapping
accuracy. The method implemented in this operator is a nonlinear
adaptive algorithm proposed by Goldstein and Werner [1] in 1998.
Input and Output
- The
input to this operator is the output of Interferogram Formation operator.
- The output of this operator is a stack of filtered I/Q bands.
Parameters Used
The following processing parameter is required for this operator (see Figure
1):
- Adaptive Filter Exponent: A value lies in range (0,1]. The larger the value the stronger the filtering.
Figure 1. Goldstein Phase Filtering operator
UI
Reference:
[1] R.M. Goldstein and C.L. Werner, "Radar
Interferogram Phase Filtering for Geophysical Applications,"
Geophysical Research Letters, 25, 4035-4038, 1998
