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/* repeatedly convolve with a rotating mask
*
* 23/10/13
* - from vips_conv()
*/
/*
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 <vips/intl.h>
#include <stdio.h>
#include <vips/vips.h>
#include "pconvolution.h"
typedef struct {
VipsConvolution parent_instance;
int times;
VipsAngle45 angle;
VipsCombine combine;
VipsPrecision precision;
int layers;
int cluster;
} VipsCompass;
typedef VipsConvolutionClass VipsCompassClass;
G_DEFINE_TYPE( VipsCompass, vips_compass, VIPS_TYPE_CONVOLUTION );
static int
vips_compass_build( VipsObject *object )
{
VipsConvolution *convolution = (VipsConvolution *) object;
VipsCompass *compass = (VipsCompass *) object;
VipsImage **masks;
VipsImage *mask;
VipsImage **images;
int i;
VipsImage **abs;
VipsImage **combine;
VipsImage *x;
g_object_set( compass, "out", vips_image_new(), NULL );
if( VIPS_OBJECT_CLASS( vips_compass_parent_class )->build( object ) )
return( -1 );
masks = (VipsImage **)
vips_object_local_array( object, compass->times );
images = (VipsImage **)
vips_object_local_array( object, compass->times );
abs = (VipsImage **)
vips_object_local_array( object, compass->times );
combine = (VipsImage **)
vips_object_local_array( object, compass->times );
mask = convolution->M;
for( i = 0; i < compass->times; i++ ) {
if( vips_conv( convolution->in, &images[i], mask,
"precision", compass->precision,
"layers", compass->layers,
"cluster", compass->cluster,
NULL ) )
return( -1 );
if( vips_rot45( mask, &masks[i],
"angle", compass->angle,
NULL ) )
return( -1 );
mask = masks[i];
}
for( i = 0; i < compass->times; i++ )
if( vips_abs( images[i], &abs[i], NULL ) )
return( -1 );
switch( compass->combine ) {
case VIPS_COMBINE_MAX:
if( vips_bandrank( abs, &combine[0], compass->times,
"index", compass->times - 1,
NULL ) )
return( -1 );
x = combine[0];
break;
case VIPS_COMBINE_SUM:
if( vips_sum( abs, &combine[0], compass->times, NULL ) )
return( -1 );
x = combine[0];
break;
default:
g_assert_not_reached();
/* Stop compiler warnings.
*/
x = NULL;
}
if( vips_image_write( x, convolution->out ) )
return( -1 );
return( 0 );
}
static void
vips_compass_class_init( VipsCompassClass *class )
{
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
VipsObjectClass *object_class = (VipsObjectClass *) class;
gobject_class->set_property = vips_object_set_property;
gobject_class->get_property = vips_object_get_property;
object_class->nickname = "compass";
object_class->description = _( "convolve with rotating mask" );
object_class->build = vips_compass_build;
VIPS_ARG_INT( class, "times", 101,
_( "Times" ),
_( "Rotate and convolve this many times" ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
G_STRUCT_OFFSET( VipsCompass, times ),
1, 1000, 2 );
VIPS_ARG_ENUM( class, "angle", 103,
_( "Angle" ),
_( "Rotate mask by this much between convolutions" ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
G_STRUCT_OFFSET( VipsCompass, angle ),
VIPS_TYPE_ANGLE45, VIPS_ANGLE45_D90 );
VIPS_ARG_ENUM( class, "combine", 104,
_( "Combine" ),
_( "Combine convolution results like this" ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
G_STRUCT_OFFSET( VipsCompass, combine ),
VIPS_TYPE_COMBINE, VIPS_COMBINE_MAX );
VIPS_ARG_ENUM( class, "precision", 203,
_( "Precision" ),
_( "Convolve with this precision" ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
G_STRUCT_OFFSET( VipsCompass, precision ),
VIPS_TYPE_PRECISION, VIPS_PRECISION_INTEGER );
VIPS_ARG_INT( class, "layers", 204,
_( "Layers" ),
_( "Use this many layers in approximation" ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
G_STRUCT_OFFSET( VipsCompass, layers ),
1, 1000, 5 );
VIPS_ARG_INT( class, "cluster", 205,
_( "Cluster" ),
_( "Cluster lines closer than this in approximation" ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
G_STRUCT_OFFSET( VipsCompass, cluster ),
1, 100, 1 );
}
static void
vips_compass_init( VipsCompass *compass )
{
compass->times = 2;
compass->angle = VIPS_ANGLE45_D90;
compass->combine = VIPS_COMBINE_MAX;
compass->precision = VIPS_PRECISION_INTEGER;
compass->layers = 5;
compass->cluster = 1;
}
int
vips_compass( VipsImage *in, VipsImage **out, VipsImage *mask, ... )
{
va_list ap;
int result;
va_start( ap, mask );
result = vips_call_split( "compass", ap, in, out, mask );
va_end( ap );
return( result );
}
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