| /* Like im_spcor(), but calculates phase correlation in the Fourier domain. |
| * |
| * Copyright: 2008, Nottingham Trent University |
| * |
| * Author: Tom Vajzovic |
| * Written on: 2008-01-16 |
| * 7/2/10 |
| * - cleanups |
| * - gtkdoc |
| */ |
| |
| /* |
| |
| 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*/ |
| |
| /** |
| * im_phasecor_fft: |
| * @in1: first input image |
| * @in2: second input image |
| * @out: output image |
| * |
| * Convert the two input images to Fourier space, calculate phase-correlation, |
| * back to real space. |
| * |
| * See also: im_fwfft(), im_cross_phase(), |
| * |
| * Returns: 0 on success, -1 on error |
| */ |
| int |
| im_phasecor_fft( IMAGE *in1, IMAGE *in2, IMAGE *out ) |
| { |
| IMAGE *t[3]; |
| |
| if( im_open_local_array( out, t, 3, "im_phasecor_fft", "p" ) || |
| im_fwfft( in1, t[0] ) || |
| im_fwfft( in2, t[1] ) || |
| im_cross_phase( t[0], t[1], t[2] ) || |
| im_invfftr( t[2], out ) ) |
| return( -1 ); |
| |
| return( 0 ); |
| } |
