Synopsis
		sfdimag < cmp.rsf > scan.rsf semblance=n nb=2 v0= dv= nv= extend=4 mute=12 str=0. x0=

Parameters
		float dv=   int extend=4 trace extension   int mute=12 mute zone   int nb=2 semblance averaging   int nv=   bool semblance=n [y/n] if y, compute semblance; if n, stack   float str=0. maximum stretch allowed   float v0=   float x0=