ANSI-C program: cpx_to_real.c
NAME
cpx_to_real - Calculate real part, imaginary part, intensity,
magnitude, or phase from complex data.
SYNOPSIS
cpx_to_real <cpx> <real> <width>
<type>
| <cpx> | comple-valued input data file (fcomplex) |
| <real> | real-valued output data file (float) |
| <width> | samples per line of the input fcomplex data |
| [type] | output data type 0: real part 1: imaginary part 2: intensity (re*re + im*im) 3: magnitude (sqrt(re*re + im*im)) 4: phase (atan2(im, re)) |
EXAMPLES
cpx_to_real 1352_1610.offs 1352.offs.re 128
0
cpx_to_real 1352_1610.offs 1352.offs.im 128 1
extracts estimated azimuth offsets (=imaginary part) from complex valued offsets file.cpx_to_real 1352.slc 1352.mli 2500 2
calculates single look backscatter intensity from SLC image in fcomplex format.cpx_to_real 1352_1610.flt 1352_1610.cc 2500 3
the magnitude of complex valued interferograms corresponds to a coherence estimate.cpx_to_real 1352_1610.flt 1352_1610.phase 2500 4
calculates the wrapped interferometric phase of a complex valued interferogramDESCRIPTION
cpx_to_real reads a file
of complex valued data (fcomplex) such provided in an
interferogram (*.int, *.flt), an offset estimation file (*.offs),
or a SLC image in fcomplex format and calculates for each
pixel either the real part, the imaginary part, the intensity,
the magnitude, or the phase, and writes out these data as a data
file in float format.
The magnitude is defined as the square root of the intensity; i.e. intensity = re*re + im*im and magnitude = sqrt(re*re + im*im).
The calculated phase values are expressed in radian in the interval (-PI, +PI) and are equal to atan(imaginary/real)
SEE ALSO
typedef_ISP.h.
© Copyrights for Documentation, Users Guide and Reference Manual by Gamma Remote Sensing, 2006.
TS, UW, CW, last change 11-Apr-2006.