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\n Synopsis
		sfiwigrad < in.rsf > out.rsf source=source.rsf data=data.rsf imask=imask.rsf weight=weight.rsf precon=precon.rsf verb=n nh=0 load=n update=y uts=0 npml=10 prect1=5 prect2=1 prect3=5 pliter=20 plower=0.1 pupper=3. dorder=6 grect1=5 grect2=5 gliter=1 geps=0. gscale=0.5 miter=10 lower=1.5 upper=7.5 order= cost=

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\n Parameters
		\n \n \n \n   string cost= \tcost functional type (default classic DSO) \n \n \n\n \n \n \n   string data= \tauxiliary input file name \n \n \n\n \n \n \n   int dorder=6 \timage derivative accuracy order \n \n \n\n \n \n \n   float geps=0. \tregularization parameter for Gauss-Newton \n \n \n\n \n \n \n   int gliter=1 \t# of Gauss-Newton iterations \n \n \n\n \n \n \n   int grect1=5 \tgradient smoothing radius on axis 1 \n \n \n\n \n \n \n   int grect2=5 \tgradient smoothing radius on axis 2 \n \n \n\n \n \n \n   float gscale=0.5 \tgradient re-scale \n \n \n\n \n \n \n   string imask= \tauxiliary input file name \n \n \n\n \n \n \n   bool load=n [y/n] \tload LU \n \n \n\n \n \n \n   float lower=1.5 \tlower bound of feasible set \n \n \n\n \n \n \n   int miter=10 \tNonlinear-CG maximum # of iterations \n \n \n\n \n \n \n   int nh=0 \thorizontal space-lag \n \n \n\n \n \n \n   int npml=10 \tPML width \n \n \n\n \n \n \n   string order= \tdiscretization scheme (default optimal 9-point) \n \n \n\n \n \n \n   int pliter=20 \tslope estimation # of linear iterations \n \n \n\n \n \n \n   float plower=0.1 \tslope thresholding lower limit \n \n \n\n \n \n \n   string precon= \tauxiliary input file name \n \n \n\n \n \n \n   int prect1=5 \tslope smoothing radius on axis 1 \n \n \n\n \n \n \n   int prect2=1 \tslope smoothing radius on axis 2 \n \n \n\n \n \n \n   int prect3=5 \tslope smoothing radius on axis 3 \n \n \n\n \n \n \n   float pupper=3. \tslope thresholding upper limit \n \n \n\n \n \n \n   string source= \tauxiliary input file name \n \n \n\n \n \n \n   bool update=y [y/n] \tNon-linear CG update \n \n \n\n \n \n \n   float upper=7.5 \tupper bound of feasible set \n \n \n\n \n \n \n   int uts=0 \tnumber of OMP threads \n \n \n\n \n \n \n   bool verb=n [y/n] \tverbosity flag \n \n \n\n \n \n \n   string weight= \tauxiliary input file name \n \n \n

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