Synopsis
		sfplanereg3 < in.rsf > out.rsf dip=dip.rsf xkey= ykey= interp=2 niter=100 eps=0.01 order=1 nj1=1 nj2=1 verb=n head=

Parameters
		file dip= auxiliary input file name   float eps=0.01 regularization parameter   string head=   int interp=2 interpolation length   int niter=100 number of iterations   int nj1=1   int nj2=1 antialiasing   int order=1 [1,2,3] accuracy order   bool verb=n [y/n] verbosity flag   int xkey= x key number   int ykey= y key number