73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
/* Like im_spcor(), but calculates phase correlation in the Fourier domain.
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*
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* Copyright: 2008, Nottingham Trent University
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*
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* Author: Tom Vajzovic
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* Written on: 2008-01-16
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* 7/2/10
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* - cleanups
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* - gtkdoc
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*/
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/*
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This file is part of VIPS.
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VIPS is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA
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*/
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/*
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These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif /*HAVE_CONFIG_H*/
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#include <vips/intl.h>
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#include <vips/vips.h>
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/**
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* im_phasecor_fft:
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* @in1: first input image
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* @in2: second input image
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* @out: output image
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*
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* Convert the two input images to Fourier space, calculate phase-correlation,
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* back to real space.
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*
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* See also: im_fwfft(), im_cross_phase(),
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*
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* Returns: 0 on success, -1 on error
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*/
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int
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im_phasecor_fft( IMAGE *in1, IMAGE *in2, IMAGE *out )
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{
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IMAGE *t[3];
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if( im_open_local_array( out, t, 3, "im_phasecor_fft", "p" ) ||
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im_fwfft( in1, t[0] ) ||
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im_fwfft( in2, t[1] ) ||
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im_cross_phase( t[0], t[1], t[2] ) ||
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im_invfftr( t[2], out ) )
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return( -1 );
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return( 0 );
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}
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