Program sfpwarp | Shift estimation by amplitude-adjusted plane-wave destruction 
[SYNOPSIS]
sfpwarp < inp.rsf other=oth.rsf > shift.rsf ishift=ishift.rsf niter=5 liter=20 rect1=1 rect2=1 order=1 drift=n verb=n eps=0.0f
[PARAMETERS]
bool    | drift | =n |  [y/n] | 	if shift filter 
float   | eps | =0.0f |   | 	regularization 
string  | ishift | = |   | 	initial shift (auxiliary input file name)
int     | liter | =20 |   | 	number of linear iterations 
int     | niter | =5 |   | 	number of iterations 
int     | order | =1 |   | 	accuracy order 
file    | other | = |   | 	auxiliary input file name
int     | rect1 | =1 |   | 	shift smoothness on 1st axis 
int     | rect2 | =1 |   | 	shift smoothness on 2nd axis 
bool    | verb | =n |  [y/n] | 	verbosity flag 
[DIRECTORY]
user/pwd
