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Msimidenoise1.c
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Msimidenoise1.c
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/* Random noise attenuation using local similarity (different weighting approach)
The weighting function is defined as
W(s) = 1 if s>s2
= (s-s1)/(s2-s1) if s1<=s<=s2
= 0 if s<s1
*/
/*
Copyright (C) 2013 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 "fxdeconutil.h"
int main(int argc, char *argv[])
{
int i1,i2,i3,n1,n11,n2,n22,n3,n33;
float *tracein,*ref,s1,s2;
sf_file in=NULL, simi=NULL, out=NULL;
sf_init(argc,argv);
in = sf_input("in");
out = sf_output("out");
simi=sf_input("similarity");
if(!sf_histint(in,"n1",&n1)) sf_error("No n1 in input");
if(!sf_histint(in,"n2",&n2)) sf_error("No n2 in input");
n3=sf_leftsize(in,2);
if(!sf_histint(simi,"n1",&n11)) sf_error("No n1 in input");
if(!sf_histint(simi,"n2",&n22)) sf_error("No n2 in input");
n33=sf_leftsize(simi,2);
if(n1!=n11 || n2!=n22 || n3!=n33) sf_error("Dimension dismatch");
tracein=sf_floatalloc(n1);
ref=sf_floatalloc(n1);
if (!sf_getfloat("s1",&s1)) sf_error("Need s1=");
/* thresholding level 1 */
if (!sf_getfloat("s2",&s2)) sf_error("Need s2=");
/* thresholding level 2 */
for(i3=0;i3<n3;i3++)
{
for(i2=0;i2<n2;i2++)
{
sf_floatread(tracein,n1,in);
sf_floatread(ref,n1,simi);
for(i1=0;i1<n1;i1++)
{
if(ref[i1] < s1)
tracein[i1] = 0;
else if(ref[i1]>=s1 && ref[i1]<=s2)
{tracein[i1]=tracein[i1]*(ref[i1]-s1)/(s2-s1);}
else
{tracein[i1]=tracein[i1];}
}
sf_floatwrite(tracein,n1,out);
}
}
exit(0);
}