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/* dECMC.c
*
* Modified:
* 31/10/12
* - from dE76.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 <vips/vips.h>
#include <vips/debug.h>
#include "pcolour.h"
typedef struct _VipsdECMC {
VipsColourDifference parent_instance;
} VipsdECMC;
typedef VipsColourDifferenceClass VipsdECMCClass;
G_DEFINE_TYPE(VipsdECMC, vips_dECMC, VIPS_TYPE_COLOUR_DIFFERENCE);
static void
vips_dECMC_class_init(VipsdECMCClass *class)
{
VipsObjectClass *object_class = (VipsObjectClass *) class;
VipsColourClass *colour_class = VIPS_COLOUR_CLASS(class);
object_class->nickname = "dECMC";
object_class->description = _("calculate dECMC");
colour_class->process_line = vips__pythagoras_line;
}
static void
vips_dECMC_init(VipsdECMC *dECMC)
{
VipsColourDifference *difference = VIPS_COLOUR_DIFFERENCE(dECMC);
difference->interpretation = VIPS_INTERPRETATION_CMC;
}
/**
* vips_dECMC: (method)
* @left: first input image
* @right: second input image
* @out: (out): output image
* @...: `NULL`-terminated list of optional named arguments
*
* Calculate dE CMC. The input images are transformed to CMC colour space and
* the euclidean distance between corresponding pixels calculated.
*
* To calculate a colour difference with values for (l:c) other than (1:1),
* transform the two source images to CMC yourself, scale the channels
* appropriately, and call this function.
*
* ::: seealso
* [method@Image.colourspace]
*
* Returns: 0 on success, -1 on error
*/
int
vips_dECMC(VipsImage *left, VipsImage *right, VipsImage **out, ...)
{
va_list ap;
int result;
va_start(ap, out);
result = vips_call_split("dECMC", ap, left, right, out);
va_end(ap);
return result;
}
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