104 lines
2.6 KiB
C
104 lines
2.6 KiB
C
/* dECMC.c
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*
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* Modified:
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* 31/10/12
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* - from dE76.c
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*/
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/*
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This file is part of VIPS.
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VIPS is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA
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*/
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/*
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These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif /*HAVE_CONFIG_H*/
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#include <glib/gi18n-lib.h>
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#include <vips/vips.h>
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#include <vips/debug.h>
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#include "pcolour.h"
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typedef struct _VipsdECMC {
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VipsColourDifference parent_instance;
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} VipsdECMC;
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typedef VipsColourDifferenceClass VipsdECMCClass;
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G_DEFINE_TYPE( VipsdECMC, vips_dECMC, VIPS_TYPE_COLOUR_DIFFERENCE );
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static void
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vips_dECMC_class_init( VipsdECMCClass *class )
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{
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VipsObjectClass *object_class = (VipsObjectClass *) class;
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VipsColourClass *colour_class = VIPS_COLOUR_CLASS( class );
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object_class->nickname = "dECMC";
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object_class->description = _( "calculate dECMC" );
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colour_class->process_line = vips__pythagoras_line;
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}
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static void
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vips_dECMC_init( VipsdECMC *dECMC )
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{
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VipsColourDifference *difference = VIPS_COLOUR_DIFFERENCE( dECMC );
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difference->interpretation = VIPS_INTERPRETATION_CMC;
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}
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/**
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* vips_dECMC:
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* @left: first input image
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* @right: second input image
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* @out: (out): output image
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* @...: %NULL-terminated list of optional named arguments
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*
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* Calculate dE CMC. The input images are transformed to CMC colour space and
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* the euclidean distance between corresponding pixels calculated.
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*
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* To calculate a colour difference with values for (l:c) other than (1:1),
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* transform the two source images to CMC yourself, scale the channels
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* appropriately, and call this function.
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*
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* See also: vips_colourspace()
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*
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* Returns: 0 on success, -1 on error
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*/
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int
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vips_dECMC( VipsImage *left, VipsImage *right, VipsImage **out, ... )
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{
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va_list ap;
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int result;
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va_start( ap, out );
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result = vips_call_split( "dECMC", ap, left, right, out );
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va_end( ap );
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return( result );
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}
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