libvips/libsrc/mosaicing/im_align_bands.c

88 lines
2.4 KiB
C

/*
* Brute force align the bands of an image.
*
* Copyright: Nottingham Trent University
* Author: Tom Vajzovic
* Written on: 2008-02-04
*/
/*
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_align_bands( IMAGE *in, IMAGE *out ){
#define FUNCTION_NAME "im_align_bands"
if( im_piocheck( in, out ))
return -1;
if( 1 == in-> Bands )
return im_copy( in, out );
{
IMAGE **bands= IM_ARRAY( out, 2 * in-> Bands, IMAGE* );
IMAGE **wrapped_bands= bands + in-> Bands;
double x= 0.0;
double y= 0.0;
int i;
if( ! bands || im_open_local_array( out, bands, in-> Bands, FUNCTION_NAME ": bands", "p" )
|| im_open_local_array( out, wrapped_bands + 1, in-> Bands - 1, FUNCTION_NAME ": wrapped_bands", "p" ))
return -1;
for( i= 0; i < in-> Bands; ++i )
if( im_extract_band( in, bands[i], i ))
return -1;
wrapped_bands[ 0 ]= bands[0];
for( i= 1; i < in-> Bands; ++i ){
IMAGE *temp= im_open( FUNCTION_NAME ": temp", "t" );
double this_x, this_y, val;
if( ! temp || im_phasecor_fft( bands[i-1], bands[i], temp )
|| im_maxpos_avg( temp, & this_x, & this_y, & val ) || im_close( temp ))
return -1;
x+= this_x;
y+= this_y;
if( im_wrap( bands[i], wrapped_bands[i], (int) x, (int) y ))
return -1;
}
return im_gbandjoin( wrapped_bands, out, in-> Bands );
}
#undef FUNCTION_NAME
}