120 lines
2.6 KiB
C
120 lines
2.6 KiB
C
/* im_dE00_fromLab.c
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*
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* 10/10/02 JC
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* - from dECMC
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* 30/10/09
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* - add im__colour_binary() and use it
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* - gtkdoc comment
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 <vips/intl.h>
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#include <vips/vips.h>
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#include <vips/internal.h>
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#ifdef WITH_DMALLOC
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#include <dmalloc.h>
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#endif /*WITH_DMALLOC*/
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/* A colour difference operation.
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*/
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int
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im__colour_difference( const char *domain,
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IMAGE *in1, IMAGE *in2, IMAGE *out,
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im_wrapmany_fn buffer_fn, void *a, void *b )
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{
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IMAGE *t[3];
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if( im_check_uncoded( domain, in1 ) ||
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im_check_uncoded( domain, in2 ) ||
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im_check_bands( domain, in1, 3 ) ||
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im_check_bands( domain, in2, 3 ) ||
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im_check_same_size( domain, in1, in2 ) ||
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im_open_local_array( out, t, 2, domain, "p" ) ||
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im_clip2fmt( in1, t[0], IM_BANDFMT_FLOAT ) ||
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im_clip2fmt( in2, t[1], IM_BANDFMT_FLOAT ) )
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return( -1 );
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if( im_cp_descv( out, t[0], t[1], NULL ) )
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return( -1 );
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out->Bands = 1;
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out->Type = IM_TYPE_B_W;
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t[2] = NULL;
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if( im_wrapmany( t, out, buffer_fn, a, b ) )
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return( -1 );
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return( 0 );
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}
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/* Process a buffer.
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*/
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void
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imb_dE00_fromLab( float **p, float *q, int n )
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{
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float *p1 = p[0];
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float *p2 = p[1];
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int x;
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for( x = 0; x < n; x++ ) {
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float L1 = p1[0];
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float a1 = p1[1];
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float b1 = p1[2];
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float L2 = p2[0];
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float a2 = p2[1];
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float b2 = p2[2];
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p1 += 3;
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p2 += 3;
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q[x] = im_col_dE00( L1, a1, b1, L2, a2, b2 );
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}
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}
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/**
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* im_dE00_fromLab:
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* @in1: first input image
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* @in2: second input image
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* @out: output image
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*
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* Calculate CIE dE00 from two Lab images.
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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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im_dE00_fromLab( IMAGE *in1, IMAGE *in2, IMAGE *out )
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{
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return( im__colour_difference( "im_dE00_fromLab",
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in1, in2, out,
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(im_wrapmany_fn) imb_dE00_fromLab, NULL, NULL ) );
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}
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