151 lines
3.5 KiB
C
151 lines
3.5 KiB
C
/* Like 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
|
|
* 3/1/14
|
|
* - redone as a class
|
|
*/
|
|
|
|
/*
|
|
|
|
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., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
02110-1301 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 <glib/gi18n-lib.h>
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
#include <vips/vips.h>
|
|
#include "pfreqfilt.h"
|
|
|
|
typedef struct _VipsPhasecor {
|
|
VipsFreqfilt parent_instance;
|
|
|
|
VipsImage *in2;
|
|
} VipsPhasecor;
|
|
|
|
typedef VipsFreqfiltClass VipsPhasecorClass;
|
|
|
|
G_DEFINE_TYPE( VipsPhasecor, vips_phasecor, VIPS_TYPE_FREQFILT );
|
|
|
|
static int
|
|
vips_phasecor_build( VipsObject *object )
|
|
{
|
|
VipsFreqfilt *freqfilt = VIPS_FREQFILT( object );
|
|
VipsPhasecor *phasecor = (VipsPhasecor *) object;
|
|
VipsImage **t = (VipsImage **) vips_object_local_array( object, 5 );
|
|
|
|
VipsImage *in1, *in2;
|
|
|
|
if( VIPS_OBJECT_CLASS( vips_phasecor_parent_class )->
|
|
build( object ) )
|
|
return( -1 );
|
|
|
|
in1 = freqfilt->in;
|
|
in2 = phasecor->in2;
|
|
|
|
if( in1->BandFmt != VIPS_FORMAT_COMPLEX ) {
|
|
if( vips_fwfft( in1, &t[0], NULL ) )
|
|
return( -1 );
|
|
in1 = t[0];
|
|
}
|
|
|
|
if( in2->BandFmt != VIPS_FORMAT_COMPLEX ) {
|
|
if( vips_fwfft( in2, &t[1], NULL ) )
|
|
return( -1 );
|
|
in2 = t[1];
|
|
}
|
|
|
|
if( vips_cross_phase( in1, in2, &t[2], NULL ) ||
|
|
vips_invfft( t[2], &t[3], "real", TRUE, NULL ) ||
|
|
vips_image_write( t[3], freqfilt->out ) )
|
|
return( -1 );
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
static void
|
|
vips_phasecor_class_init( VipsPhasecorClass *class )
|
|
{
|
|
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
|
|
VipsObjectClass *vobject_class = VIPS_OBJECT_CLASS( class );
|
|
|
|
gobject_class->set_property = vips_object_set_property;
|
|
gobject_class->get_property = vips_object_get_property;
|
|
|
|
vobject_class->nickname = "phasecor";
|
|
vobject_class->description = _( "calculate phase correlation" );
|
|
vobject_class->build = vips_phasecor_build;
|
|
|
|
VIPS_ARG_IMAGE( class, "in2", 0,
|
|
_( "in2" ),
|
|
_( "Second input image" ),
|
|
VIPS_ARGUMENT_REQUIRED_INPUT,
|
|
G_STRUCT_OFFSET( VipsPhasecor, in2 ) );
|
|
|
|
}
|
|
|
|
static void
|
|
vips_phasecor_init( VipsPhasecor *phasecor )
|
|
{
|
|
}
|
|
|
|
/**
|
|
* vips_phasecor:
|
|
* @in1: first input image
|
|
* @in2: second input image
|
|
* @out: (out): output image
|
|
* @...: %NULL-terminated list of optional named arguments
|
|
*
|
|
* Convert the two input images to Fourier space, calculate phase-correlation,
|
|
* back to real space.
|
|
*
|
|
* See also: vips_fwfft(), vips_cross_phase(),
|
|
*
|
|
* Returns: 0 on success, -1 on error.
|
|
*/
|
|
int
|
|
vips_phasecor( VipsImage *in1, VipsImage *in2, VipsImage **out, ... )
|
|
{
|
|
va_list ap;
|
|
int result;
|
|
|
|
va_start( ap, out );
|
|
result = vips_call_split( "phasecor", ap, in1, in2, out );
|
|
va_end( ap );
|
|
|
|
return( result );
|
|
}
|
|
|