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Mriesz.c
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Mriesz.c
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/* Compute 2-D Riesz transform. */
/*
Copyright (C) 2004 University of Texas at Austin
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <rsf.h>
#include "riesz.h"
int main (int argc, char* argv[])
{
int nx,ny,n2, i2, n;
float **data, **datax, **datay, c;
sf_file in, out;
sf_init (argc,argv);
in = sf_input("in");
out = sf_output("out");
if (SF_FLOAT != sf_gettype(in)) sf_error("Need float input");
if (!sf_histint(in,"n1",&nx)) sf_error("No n1= in input");
if (!sf_histint(in,"n2",&ny)) sf_error("No n2= in input");
n2 = sf_leftsize(in,2);
sf_shiftdim(in, out, 3);
sf_putint(out, "n3", 2);
data = sf_floatalloc2(nx,ny);
datax = sf_floatalloc2(nx,ny);
datay = sf_floatalloc2(nx,ny);
if (!sf_getint("order",&n)) n=10;
/* Hilbert transformer order */
if (!sf_getfloat("ref",&c)) c=1.;
/* Hilbert transformer reference (0.5 < ref <= 1) */
riesz_init(n, c);
for (i2=0; i2 < n2; i2++) {
sf_floatread(data[0],nx*ny,in);
riesz(nx,ny,data,datax,datay);
sf_floatwrite(datax[0],nx*ny,out);
sf_floatwrite(datay[0],nx*ny,out);
}
exit(0);
}