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libvips/libsrc/mosaicing/im_tbmosaic.c

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/* @(#) Program to calculate the best possible tie points
* @(#) in the overlapping part between the primary and the secondary picture
* @(#)
* @(#) Right call:
* @(#) int im_tbmosaic( reference, secondary, out, bandno,
* @(#) xref, yref, xsec, ysec, halfcorrelation, halfarea, balancetype )
* @(#) IMAGE *reference, *secondary, *out;
* @(#) int bandno;
* @(#) int xref, yref, xsec, ysec;
* @(#) int halfcorrelation, halfarea;
* @(#) int balancetype;
* @(#)
* @(#) Returns 0 on success and -1 on error
* @(#)
*
* Copyright: 1990, N. Dessipris.
*
* Author: Nicos Dessipris
* Written on: 07/11/1989
* Modified on : 29/11/1989, 18/04/1991
* Modified and debugged by Ahmed Abbood . 1995
* 14/6/95 JC
* - adapted for new balance ideas
* - more bug-fixes
* 1/11/95 JC
* - frees memory used by analysis phase as soon as possible
* - means large mosaics use significantly less peak memory
* 26/3/96 JC
* - now calls im_tbmerge() rather than im__tbmerge()
* 30/7/97 JC
* - im__find_tboverlap() returns 1st order params too
* 2/2/01 JC
* - added tunable max blend width
* 24/2/05
* - im_scale() makes it work for any image type
*/
/*
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 <stdio.h>
#include <string.h>
#include <vips/vips.h>
#include <vips/internal.h>
#include "mosaic.h"
#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif /*WITH_DMALLOC*/
int
im__find_tboverlap( IMAGE *ref_in, IMAGE *sec_in, IMAGE *out,
int bandno_in,
int xref, int yref, int xsec, int ysec,
int halfcorrelation, int halfarea,
int *dx0, int *dy0,
double *scale1, double *angle1, double *dx1, double *dy1 )
{
IMAGE *ref, *sec;
TIE_POINTS points, *p_points; /* defined in mosaic.h */
TIE_POINTS newpoints, *p_newpoints;
int i;
int dx, dy;
Rect top, bottom, overlap;
/* Check ref and sec are compatible.
*/
if( ref_in->Bands != sec_in->Bands ||
ref_in->BandFmt != sec_in->BandFmt ||
ref_in->Coding != sec_in->Coding ) {
im_errormsg( "im_tbmosaic: input images incompatible" );
return( -1 );
}
/* Test cor and area.
*/
if( halfcorrelation < 0 || halfarea < 0 ||
halfarea < halfcorrelation ) {
im_errormsg( "im_tbmosaic: bad area parameters" );
return( -1 );
}
/* Set positions of top and bottom.
*/
top.left = 0;
top.top = 0;
top.width = ref_in->Xsize;
top.height = ref_in->Ysize;
bottom.left = xref - xsec;
bottom.top = yref - ysec;
bottom.width = sec_in->Xsize;
bottom.height = sec_in->Ysize;
/* Find overlap.
*/
im_rect_intersectrect( &top, &bottom, &overlap );
if( overlap.width < 2*halfarea + 1 ||
overlap.height < 2*halfarea + 1 ) {
im_errormsg( "im_tbmosaic: overlap too small for search" );
return( -1 );
}
/* Extract overlaps.
*/
ref = im_open_local( out, "temp_one", "t" );
sec = im_open_local( out, "temp_two", "t" );
if( !ref || !sec )
return( -1 );
if( ref_in->Coding == IM_CODING_LABQ ) {
IMAGE *t1 = im_open_local( out, "temp:3", "p" );
IMAGE *t2 = im_open_local( out, "temp:4", "p" );
IMAGE *t3 = im_open_local( out, "temp:5", "p" );
IMAGE *t4 = im_open_local( out, "temp:6", "p" );
IMAGE *t5 = im_open_local( out, "temp:7", "p" );
IMAGE *t6 = im_open_local( out, "temp:8", "p" );
if( !t1 || !t2 || !t3 || !t4 || !t5 || !t6 )
return( -1 );
if( im_extract_area( ref_in, t1,
overlap.left, overlap.top,
overlap.width, overlap.height ) )
return( -1 );
if( im_extract_area( sec_in, t2,
overlap.left - bottom.left, overlap.top - bottom.top,
overlap.width, overlap.height ) )
return( -1 );
if( im_LabQ2Lab( t1, t3 ) || im_LabQ2Lab( t2, t4 ) ||
im_Lab2disp( t3, t5, im_col_displays( 1 ) ) ||
im_Lab2disp( t4, t6, im_col_displays( 1 ) ) )
return( -1 );
/* Extract the green.
*/
if( im_extract_band( t5, ref, 1 ) ||
im_extract_band( t6, sec, 1 ) )
return( -1 );
}
else if( ref_in->Coding == IM_CODING_NONE ) {
IMAGE *t1 = im_open_local( out, "temp:9", "p" );
IMAGE *t2 = im_open_local( out, "temp:10", "p" );
IMAGE *t3 = im_open_local( out, "temp:11", "p" );
IMAGE *t4 = im_open_local( out, "temp:12", "p" );
if( !t1 || !t2 || !t3 || !t4 )
return( -1 );
if( im_extract_area( ref_in, t1,
overlap.left, overlap.top,
overlap.width, overlap.height ) )
return( -1 );
if( im_extract_area( sec_in, t2,
overlap.left - bottom.left, overlap.top - bottom.top,
overlap.width, overlap.height ) )
return( -1 );
if( im_extract_band( t1, t3, bandno_in ) ||
im_extract_band( t2, t4, bandno_in ) )
return( -1 );
if( im_scale( t3, ref ) ||
im_scale( t4, sec ) )
return( -1 );
}
else {
im_errormsg( "im_tbmosaic: unknown Coding type" );
return( -1 );
}
/* Initialise and fill TIE_POINTS
*/
p_points = &points;
p_newpoints = &newpoints;
p_points->reference = ref_in->filename;
p_points->secondary = sec_in->filename;
p_points->nopoints = IM_MAXPOINTS;
p_points->deltax = 0;
p_points->deltay = 0;
p_points->halfcorsize = halfcorrelation;
p_points->halfareasize = halfarea;
/* Initialise the structure
*/
for( i = 0; i < IM_MAXPOINTS; i++ ) {
p_points->x_reference[i] = 0;
p_points->y_reference[i] = 0;
p_points->x_secondary[i] = 0;
p_points->y_secondary[i] = 0;
p_points->contrast[i] = 0;
p_points->correlation[i] = 0.0;
p_points->dx[i] = 0.0;
p_points->dy[i] = 0.0;
p_points->deviation[i] = 0.0;
}
/* Search ref for possible tie-points. Sets: p_points->contrast,
* p_points->x,y_reference.
*/
if( im__tbcalcon( ref, p_points ) )
return( -1 );
/* For each candidate point, correlate against corresponding part of
* sec. Sets x,y_secondary and fills correlation and dx, dy.
*/
if( im__chkpair( ref, sec, p_points ) )
return( -1 );
/* First call to im_clinear().
*/
if( im__initialize( p_points ) )
return( -1 );
/* Improve the selection of tiepoints until all abs(deviations) are
* < 1.0 by deleting all wrong points.
*/
if( im__improve( p_points, p_newpoints ) )
return( -1 );
/* Average remaining offsets.
*/
if( im__avgdxdy( p_newpoints, &dx, &dy ) )
return( -1 );
/* Offset with overlap position.
*/
*dx0 = -bottom.left + dx;
*dy0 = -bottom.top + dy;
/* Write 1st order parameters too.
*/
*scale1 = newpoints.l_scale;
*angle1 = newpoints.l_angle;
*dx1 = newpoints.l_deltax;
*dy1 = newpoints.l_deltay;
return( 0 );
}
int
im_tbmosaic( IMAGE *ref, IMAGE *sec, IMAGE *out,
int bandno,
int xref, int yref, int xsec, int ysec,
int halfcorrelation, int halfarea,
int balancetype,
int mwidth )
{
int dx0, dy0;
double scale1, angle1, dx1, dy1;
IMAGE *ref2, *sec2;
IMAGE *dummy;
/* Correct overlap. dummy is just a placeholder used to ensure that
* memory used by the analysis phase is freed as soon as possible.
*/
if( !(dummy = im_open( "placeholder:1", "p" )) )
return( -1 );
if( im__find_tboverlap( ref, sec, dummy,
bandno,
xref, yref, xsec, ysec,
halfcorrelation, halfarea,
&dx0, &dy0,
&scale1, &angle1, &dx1, &dy1 ) ) {
im_close( dummy );
return( -1 );
}
im_close( dummy );
/* Balance.
*/
if( im__balance( ref, sec, out,
&ref2, &sec2,
dx0, dy0, balancetype ) )
return( -1 );
/* Merge top-bottom.
*/
if( im_tbmerge( ref2, sec2, out, dx0, dy0, mwidth ) )
return( -1 );
return( 0 );
}
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