libvips/libsrc/convolution/im_phasecor_fft.c

64 lines
1.8 KiB
C
Raw Normal View History

2008-01-22 11:43:26 +01:00
/* Like im_spcor(), but calculates phase correlation in the Fourier domain.
*
* Copyright: 2008, Nottingham Trent University
*
* Author: Tom Vajzovic
* Written on: 2008-01-16
*/
/*
This file is part of VIPS.
VIPS is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser 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
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <vips/intl.h>
#include <vips/vips.h>
#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif /*WITH_DMALLOC*/
int im_phasecor_fft( IMAGE *in1, IMAGE *in2, IMAGE *out ){
#define FUNCTION_NAME "im_fft_phasecor"
IMAGE *temp1= im_open_local( out, FUNCTION_NAME ": temp1", "t" );
IMAGE *temp2= im_open_local( out, FUNCTION_NAME ": temp2", "t" );
IMAGE *temp3= im_open_local( out, FUNCTION_NAME ": temp3", "t" );
if( ! temp1 || ! temp2 || ! temp3 )
return -1;
return im_incheck( in1 )
|| im_incheck( in2 )
|| im_outcheck( out )
|| im_fwfft( in1, temp1 )
|| im_fwfft( in2, temp2 )
|| im_cross_phase( temp1, temp2, temp3 )
|| im_invfftr( temp3, out );
#undef FUNCTION_NAME
}