Synopsis
		sfmatchoper < in.rsf > out.rsf weight=weight.rsf np= dp= p0= shift= verb=n freq=y parab=n x0=1. rho=y anti=1. p1=0. niter=100 pclip=100.

Parameters
		float anti=1. antialiasing, only when freq=n   float dp= p sampling   bool freq=y [y/n] if y, parabolic Radon transform   int niter=100 number of iterations   int np= number of p values   float p0= p origin   float p1=0. reference slope, only when freq=n   bool parab=n [y/n] if y, parabolic Radon transform, only when freq=y   float pclip=100.   bool rho=y [y/n] rho filtering, only when freq=n   int shift=   bool verb=n [y/n] verbosity flag   string weight= auxiliary output file name   float x0=1. reference offset