This routine takes the FFT of a 2D map, applies a
Fourier-space filter, and then transforms back to real-space before writing out. Currently the only
available filter is a whitening filter which is measured using a supplied reference image.
FILT_EDGEHIGH = _REAL (Write)
High-pass filter frequency (1/arcsec)
Low-pass filter frequency (1/arcsec)
IN = NDF (Read)
Input files to be
MSG_FILTER = _CHAR (Read)
Control the verbosity of the application. Values
can be NONE (no messages), QUIET (minimal messages), NORMAL, VERBOSE, DEBUG
or ALL. [NORMAL]
OUT = NDF (Write)
Output transformed files.
Optional NDF for the filter.
WHITEN = _LOGICAL (Read)
measure azimuthally-averaged angular power spectrum in WHITEREFMAP, fit a model
apply its complement to the FFT of the data (normalized to W). AZAVSPEC is set implicitly. [FALSE]
WHITEREFMAP = NDF (Read)
Reference map in which to measure whitening filter. [FALSE]
ZEROBAD = _LOGICAL (Read)
Zero any bad values in the data before taking FFT. [TRUE]
Transforming data loses the VARIANCE and QUALITY components.