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/* base class for correlation
*
* 7/11/13
* - from convolution.c
*/
/*
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 <math.h>
#include <vips/vips.h>
#include <vips/internal.h>
#include "pconvolution.h"
#include "correlation.h"
G_DEFINE_ABSTRACT_TYPE(VipsCorrelation, vips_correlation,
VIPS_TYPE_OPERATION);
static int
vips_correlation_gen(VipsRegion *out_region,
void *seq, void *a, void *b, gboolean *stop)
{
VipsRegion *ir = (VipsRegion *) seq;
VipsCorrelation *correlation = (VipsCorrelation *) b;
VipsCorrelationClass *cclass =
VIPS_CORRELATION_GET_CLASS(correlation);
VipsRect *r = &out_region->valid;
VipsRect irect;
/* What part of ir do we need?
*/
irect.left = r->left;
irect.top = r->top;
irect.width = r->width + correlation->ref_ready->Xsize - 1;
irect.height = r->height + correlation->ref_ready->Ysize - 1;
if (vips_region_prepare(ir, &irect))
return -1;
cclass->correlation(correlation, ir, out_region);
return 0;
}
static int
vips_correlation_build(VipsObject *object)
{
VipsObjectClass *class = VIPS_OBJECT_GET_CLASS(object);
VipsCorrelationClass *cclass = VIPS_CORRELATION_CLASS(class);
VipsCorrelation *correlation = (VipsCorrelation *) object;
VipsImage **t = (VipsImage **) vips_object_local_array(object, 6);
if (VIPS_OBJECT_CLASS(vips_correlation_parent_class)->build(object))
return -1;
/* Stretch input out.
*/
if (vips_embed(correlation->in, &t[0],
correlation->ref->Xsize / 2, correlation->ref->Ysize / 2,
correlation->in->Xsize + correlation->ref->Xsize - 1,
correlation->in->Ysize + correlation->ref->Ysize - 1,
"extend", VIPS_EXTEND_COPY,
NULL))
return -1;
if (vips__formatalike(t[0], correlation->ref, &t[1], &t[2]) ||
vips__bandalike(class->nickname, t[1], t[2], &t[3], &t[4]) ||
!(t[5] = vips_image_copy_memory(t[4])))
return -1;
correlation->in_ready = t[3];
correlation->ref_ready = t[5];
g_object_set(object, "out", vips_image_new(), NULL);
/* FATSTRIP is good for us as THINSTRIP will cause
* too many recalculations on overlaps.
*/
if (vips_image_pipelinev(correlation->out,
VIPS_DEMAND_STYLE_FATSTRIP,
correlation->in_ready, correlation->ref_ready, NULL))
return -1;
correlation->out->Xsize = correlation->in->Xsize;
correlation->out->Ysize = correlation->in->Ysize;
correlation->out->BandFmt =
cclass->format_table[correlation->in_ready->BandFmt];
if (cclass->pre_generate &&
cclass->pre_generate(correlation))
return -1;
if (vips_image_generate(correlation->out,
vips_start_one, vips_correlation_gen, vips_stop_one,
correlation->in_ready, correlation))
return -1;
vips_reorder_margin_hint(correlation->out,
correlation->ref->Xsize * correlation->ref->Ysize);
return 0;
}
static void
vips_correlation_class_init(VipsCorrelationClass *class)
{
GObjectClass *gobject_class = G_OBJECT_CLASS(class);
VipsObjectClass *object_class = (VipsObjectClass *) class;
VipsOperationClass *operation_class = VIPS_OPERATION_CLASS(class);
gobject_class->set_property = vips_object_set_property;
gobject_class->get_property = vips_object_get_property;
object_class->nickname = "correlation";
object_class->description = _("correlation operation");
object_class->build = vips_correlation_build;
operation_class->flags = VIPS_OPERATION_SEQUENTIAL;
VIPS_ARG_IMAGE(class, "in", 0,
_("Input"),
_("Input image argument"),
VIPS_ARGUMENT_REQUIRED_INPUT,
G_STRUCT_OFFSET(VipsCorrelation, in));
VIPS_ARG_IMAGE(class, "ref", 10,
_("Mask"),
_("Input reference image"),
VIPS_ARGUMENT_REQUIRED_INPUT,
G_STRUCT_OFFSET(VipsCorrelation, ref));
VIPS_ARG_IMAGE(class, "out", 20,
_("Output"),
_("Output image"),
VIPS_ARGUMENT_REQUIRED_OUTPUT,
G_STRUCT_OFFSET(VipsCorrelation, out));
}
static void
vips_correlation_init(VipsCorrelation *correlation)
{
}
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