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/*
* $Id: cwt.c 20678 2017-12-18 18:26:55Z yeti-dn $
* Copyright (C) 2003 David Necas (Yeti), Petr Klapetek.
* E-mail: yeti@gwyddion.net, klapetek@gwyddion.net.
*
* 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., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include <libgwyddion/gwymath.h>
#include <libprocess/cwt.h>
gdouble
gwy_cwt_wfunc_2d(gdouble scale,
gdouble mval,
gint xres,
Gwy2DCWTWaveletType wtype)
{
gdouble dat2x, cur, scale2, cur2;
dat2x = 4.0/(gdouble)xres;
cur = mval*dat2x;
cur2 = cur*cur;
scale2 = scale*scale;
switch (wtype) {
case GWY_2DCWT_GAUSS:
/* return exp(-(scale2*cur2)/2)*2*G_PI*scale2*2*G_PI*scale;
* changed only for reasonable normalization*/
return exp(-(scale2*cur2)/2);
break;
case GWY_2DCWT_HAT:
return (scale2*cur2)*exp(-(scale2*cur2)/2)*2*G_PI*scale2;
break;
default:
g_return_val_if_reached(1.0);
break;
}
return 1.0;
}
/************************** Documentation ****************************/
/**
* SECTION:cwt
* @title: cwt
* @short_description: Continuous Wavelet Transform
**/
/* vim: set cin et ts=4 sw=4 cino=>1s,e0,n0,f0,{0,}0,^0,\:1s,=0,g1s,h0,t0,+1s,c3,(0,u0 : */
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