Program sfnpef | Estimate Non-stationary PEF in N dimensions.
[SYNOPSIS]
sfnpef < in.rsf > flt.rsf maskin=mask.rsf pch=patch.rsf filt=reg.rsf a= center= gap= niter=100 epsilon=0.01 lag= maskout= filt_pch= filt_lag=
[PARAMETERS]
ints    | a | = |   | 	 [dim]
ints    | center | = |   | 	 [dim]
float   | epsilon | =0.01 |   | 	regularization parameter 
file    | filt | = |   | 	auxiliary input file name
string  | filt_lag | = |   | 	input file for double-helix filter lags 
string  | filt_pch | = |   | 	
ints    | gap | = |   | 	 [dim]
string  | lag | = |   | 	output file for filter lags 
string  | maskin | = |   | 	optional input mask file (auxiliary input file name)
string  | maskout | = |   | 	optional output mask file 
int     | niter | =100 |   | 	number of iterations 
string  | pch | = |   | 	auxiliary input file name
[DIRECTORY]
user/gee
