color_vocabulary.h

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/*
    This file is part of the Ansel project.
    Copyright (C) 2022, 2024 Aurélien PIERRE.
    Copyright (C) 2022 Martin Bařinka.
    Copyright (C) 2022 Pascal Obry.
    
    Ansel is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
    
    Ansel 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 General Public License for more details.
    
    You should have received a copy of the GNU General Public License
    along with Ansel.  If not, see <http://www.gnu.org/licenses/>.
*/
 
#ifndef DT_COMMON_COLOR_VOCABULARY_H
#define DT_COMMON_COLOR_VOCABULARY_H
 
#include "common/colorspaces_inline_conversions.h"
 
#include <glib.h>
 
 
// declare a model average ± standard deviation
typedef struct gaussian_stats_t
{
  float avg;
  float std;
} gaussian_stats_t;
 
 
// bounds of the range
typedef struct range_t
{
  float bottom;
  float top;
} range_t;
 
 
// ID keys for the ethnicities database
typedef enum ethnicities_t
{
  ETHNIE_CHINESE = 0,
  ETHNIE_THAI = 1,
  ETHNIE_KURDISH = 2,
  ETHNIE_CAUCASIAN = 3,
  ETHNIE_AFRICAN_AM = 4,
  ETHNIE_MEXICAN = 5,
  ETHNIE_END = 6
} ethnicities_t;
 
 
// Translatable names for ethnicities
typedef struct ethnicity_t
{
  char *name;
  ethnicities_t ethnicity;
} ethnicity_t;
 
 
// Database entry for skin parts color of an ethnicity
typedef struct skin_color_t
{
  char *name;
  ethnicities_t ethnicity;
  gaussian_stats_t L;
  gaussian_stats_t a;
  gaussian_stats_t b;
} skin_color_t;
 
 
#define SKINS 16
 
// returns a color name for color
char *Lch_to_color_name(dt_aligned_pixel_t color);
 
// Parametric sweeping of Lch boundaries (in CIE Luv 1976) for all known skin tones +/- 2 std
void get_skin_tones_range();
 
#endif // DT_COMMON_COLOR_VOCABULARY_H
 
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