xcorr
Synopsis
xcorr master.PRM aligned.PRM [-time] [-real] [-freq] [-nx n] [-ny n] [-xsearch xs] [-ysearch ys]
Description
xcorr Compute 2-D cross-correlation of two images
Outputs:
freq_xcorr.dat (default)
time_xcorr.dat (if -time option))
Use fitoffset.csh to convert output to PRM format
Required Arguments
master.PRM
PRM file for reference image
aligned.PRM
PRM file of secondary image
Optional Arguments
-time
Use time cross-correlation
-freq
Use frequency cross-correlation (default)
-real
Read float numbers instead of complex numbers
-noshift
Ignore ashift and rshift in prm file (set to 0)
-nx nx
Number of locations in x (range) direction (int)
-ny ny
Number of locations in y (azimuth) direction (int)
-nointerp
Do not interpolate correlation function
-range_interp ri
Interpolate range by ri (power of two) [default: 2]
-norange
Do not range interpolate
-xsearch xs
Search window size in x (range) direction (int power of 2 [32 64 128 256])
-ysearch ys
Search window size in y (azimuth) direction (int power of 2 [32 64 128 256])
-interp factor
Interpolate correlation function by factor (int) [default, 16]
-v
Verbose
Example
xcorr IMG-HH-ALPSRP075880660-H1.0__A.PRM IMG-HH-ALPSRP129560660-H1.0__A.PRM -nx 20 -ny 50
or
xcorr file1.grd file2.grd -nx 20 -ny 50
(takes grids with real numbers)