Next: Input Cards
This chapter describes the processing of step FILTPHASE.
This step can be optionally used to filter the (latest) complex
interferogram, in order to reduce noise, e.g., for visualization or
aiding the phase unwrapping. It is probably best run after step
SUBTRREFPHA. A lot of warnings can be generated if an image
containing a lot of zeros is processed. These warnings can be
The method goldstein is described in .
Basically the fringes become sharper after filtering because the peak
in the spectrum (caused by the fringes) is given a higher relative
weight. Method spatialconv simply is a spatial convolution with
a certain kernel function, e.g., a 3 point moving average. Method
spectral is a multiplication of the spectrum with the kernel
specified in an input file (e.g. a spectral low pass filter (LPF)).