Source code for colour.characterisation.datasets.colour_checkers.chromaticity_coordinates

# -*- coding: utf-8 -*-
"""
Chromaticity Coordinates of the Colour Checkers
===============================================

Defines the chromaticity coordinates of the colour checkers.

Each colour checker data is in the form of an :class:`OrderedDict` class
instance of 24 samples as follows::

    {'name': 'xyY', ..., 'name': 'xyY'}

The following colour checkers are available:

-   :attr:`colour.characterisation.datasets.colour_checkers.\
chromaticity_coordinates.CCS_COLORCHECKER1976`: *ColorChecker Classic*
    developed by *McCamy et al. (1976)* at Macbeth, a Division of Kollmorgen.
-   :attr:`colour.characterisation.datasets.colour_checkers.\
chromaticity_coordinates.CCS_COLORCHECKER2005`: *ColorChecker Classic*
    reference data from *GretagMacbeth* published in 2005.
-   :attr:`colour.characterisation.datasets.colour_checkers.\
chromaticity_coordinates.CCS_BABELCOLOR_AVERAGE`: Average data derived from
    measurements of 30 *ColorChecker Classic* charts.
-   :attr:`colour.characterisation.datasets.colour_checkers.\
chromaticity_coordinates.CCS_COLORCHECKER24_BEFORE_NOV2014`:
    *ColorChecker Classic* reference data from *X-Rite* published in 2015 and
    matching the data from *GretagMacbeth* published in 2005.
-   :attr:`colour.characterisation.datasets.colour_checkers.\
chromaticity_coordinates.CCS_COLORCHECKER24_AFTER_NOV2014`:
    *ColorChecker Classic* reference data from *X-Rite* published in 2015 and
    matching the *ColorChecker Classic* edition after November 2014.

References
----------
-   :cite:`BabelColor2012b` : BabelColor. (2012). The ColorChecker (since
    1976!). Retrieved September 26, 2014, from
    http://www.babelcolor.com/main_level/ColorChecker.htm
-   :cite:`BabelColor2012c` : BabelColor. (2012). ColorChecker RGB and
    spectra.
    http://www.babelcolor.com/download/ColorChecker_RGB_and_spectra.xls
-   :cite:`X-Rite2016` : X-Rite. (2016). New color specifications for
    ColorChecker SG and Classic Charts. Retrieved October 29, 2018, from
    http://xritephoto.com/ph_product_overview.aspx?ID=938&Action=Support&\
SupportID=5884#
"""

import numpy as np
from collections import OrderedDict, namedtuple

from colour.colorimetry import CCS_ILLUMINANTS
from colour.models import Lab_to_XYZ, XYZ_to_xyY
from colour.utilities import CaseInsensitiveMapping

__author__ = 'Colour Developers, Danny Pascale '
__copyright__ = 'Copyright (C) 2013-2021 - Colour Developers'
__copyright__ += ', '
__copyright__ += (
    'BabelColor ColorChecker data: Copyright (C) 2004-2012 Danny Pascale '
    '(www.babelcolor.com); used by permission.')
__license__ = 'New BSD License - https://opensource.org/licenses/BSD-3-Clause'
__maintainer__ = 'Colour Developers'
__email__ = 'colour-developers@colour-science.org'
__status__ = 'Production'

__all__ = [
    'ColourChecker', 'SAMPLE_LABELS_COLORCHECKER_CLASSIC',
    'DATA_COLORCHECKER1976', 'CCS_ILLUMINANT_COLORCHECKER1976',
    'CCS_COLORCHECKER1976', 'DATA_COLORCHECKER2005',
    'CCS_ILLUMINANT_COLORCHECKER2005', 'CCS_COLORCHECKER2005',
    'DATA_BABELCOLOR_AVERAGE', 'CCS_ILLUMINANT_BABELCOLOR_AVERAGE',
    'CCS_BABELCOLOR_AVERAGE', 'DATA_COLORCHECKER24_BEFORE_NOV2014',
    'DATA_COLORCHECKER24_BEFORE_NOV2014',
    'CCS_ILLUMINANT_COLORCHECKER24_BEFORE_NOV2014',
    'CCS_COLORCHECKER24_BEFORE_NOV2014', 'DATA_COLORCHECKER24_AFTER_NOV2014',
    'DATA_COLORCHECKER24_AFTER_NOV2014',
    'CCS_ILLUMINANT_COLORCHECKER24_AFTER_NOV2014',
    'CCS_COLORCHECKER24_AFTER_NOV2014', 'CCS_COLOURCHECKERS'
]


[docs]class ColourChecker( namedtuple('ColourChecker', ('name', 'data', 'illuminant'))): """ *Colour Checker* data. Parameters ---------- name : unicode *Colour Checker* name. data : OrderedDict Chromaticity coordinates in *CIE xyY* colourspace. illuminant : array_like *Colour Checker* illuminant chromaticity coordinates. """
SAMPLE_LABELS_COLORCHECKER_CLASSIC = ( 'dark skin', 'light skin', 'blue sky', 'foliage', 'blue flower', 'bluish green', 'orange', 'purplish blue', 'moderate red', 'purple', 'yellow green', 'orange yellow', 'blue', 'green', 'red', 'yellow', 'magenta', 'cyan', 'white 9.5 (.05 D)', 'neutral 8 (.23 D)', 'neutral 6.5 (.44 D)', 'neutral 5 (.70 D)', 'neutral 3.5 (1.05 D)', 'black 2 (1.5 D)', ) """ *ColorChecker Classic* illuminant. SAMPLE_LABELS_COLORCHECKER_CLASSIC : tuple """ DATA_COLORCHECKER1976 = OrderedDict( zip(SAMPLE_LABELS_COLORCHECKER_CLASSIC, [ np.array([0.4002, 0.3504, 0.1005]), np.array([0.3773, 0.3446, 0.3582]), np.array([0.2470, 0.2514, 0.1933]), np.array([0.3372, 0.4220, 0.1329]), np.array([0.2651, 0.2400, 0.2427]), np.array([0.2608, 0.3430, 0.4306]), np.array([0.5060, 0.4070, 0.3005]), np.array([0.2110, 0.1750, 0.1200]), np.array([0.4533, 0.3058, 0.1977]), np.array([0.2845, 0.2020, 0.0656]), np.array([0.3800, 0.4887, 0.4429]), np.array([0.4729, 0.4375, 0.4306]), np.array([0.1866, 0.1285, 0.0611]), np.array([0.3046, 0.4782, 0.2339]), np.array([0.5385, 0.3129, 0.1200]), np.array([0.4480, 0.4703, 0.5910]), np.array([0.3635, 0.2325, 0.1977]), np.array([0.1958, 0.2519, 0.1977]), np.array([0.3101, 0.3163, 0.9001]), np.array([0.3101, 0.3163, 0.5910]), np.array([0.3101, 0.3163, 0.3620]), np.array([0.3101, 0.3163, 0.1977]), np.array([0.3101, 0.3163, 0.0900]), np.array([0.3101, 0.3163, 0.0313]), ])) CCS_ILLUMINANT_COLORCHECKER1976 = ( CCS_ILLUMINANTS['CIE 1931 2 Degree Standard Observer']['C']) """ *ColorChecker Classic 1976* illuminant. CCS_ILLUMINANT_COLORCHECKER1976 : ndarray """ CCS_COLORCHECKER1976 = ColourChecker('ColorChecker 1976', DATA_COLORCHECKER1976, CCS_ILLUMINANT_COLORCHECKER1976) """ *ColorChecker Classic* developed by *McCamy et al.* (1976) at Macbeth, a Division of Kollmorgen. CCS_COLORCHECKER1976 : ColourChecker """ DATA_COLORCHECKER2005 = OrderedDict( zip(SAMPLE_LABELS_COLORCHECKER_CLASSIC, [ np.array([0.4316, 0.3777, 0.1008]), np.array([0.4197, 0.3744, 0.3495]), np.array([0.2760, 0.3016, 0.1836]), np.array([0.3703, 0.4499, 0.1325]), np.array([0.2999, 0.2856, 0.2304]), np.array([0.2848, 0.3911, 0.4178]), np.array([0.5295, 0.4055, 0.3118]), np.array([0.2305, 0.2106, 0.1126]), np.array([0.5012, 0.3273, 0.1938]), np.array([0.3319, 0.2482, 0.0637]), np.array([0.3984, 0.5008, 0.4446]), np.array([0.4957, 0.4427, 0.4357]), np.array([0.2018, 0.1692, 0.0575]), np.array([0.3253, 0.5032, 0.2318]), np.array([0.5686, 0.3303, 0.1257]), np.array([0.4697, 0.4734, 0.5981]), np.array([0.4159, 0.2688, 0.2009]), np.array([0.2131, 0.3023, 0.1930]), np.array([0.3469, 0.3608, 0.9131]), np.array([0.3440, 0.3584, 0.5894]), np.array([0.3432, 0.3581, 0.3632]), np.array([0.3446, 0.3579, 0.1915]), np.array([0.3401, 0.3548, 0.0883]), np.array([0.3406, 0.3537, 0.0311]), ])) CCS_ILLUMINANT_COLORCHECKER2005 = ( CCS_ILLUMINANTS['CIE 1931 2 Degree Standard Observer']['ICC D50']) """ *ColorChecker Classic 2005* illuminant. CCS_ILLUMINANT_COLORCHECKER2005 : ndarray """ CCS_COLORCHECKER2005 = ColourChecker('ColorChecker 2005', DATA_COLORCHECKER2005, CCS_ILLUMINANT_COLORCHECKER2005) """ *ColorChecker Classic* data from *GretagMacbeth (2005)*. CCS_COLORCHECKER2005 : ColourChecker """ DATA_BABELCOLOR_AVERAGE = OrderedDict( zip(SAMPLE_LABELS_COLORCHECKER_CLASSIC, [ np.array([0.4325, 0.3788, 0.1034]), np.array([0.4191, 0.3748, 0.3525]), np.array([0.2761, 0.3004, 0.1847]), np.array([0.3700, 0.4501, 0.1335]), np.array([0.3020, 0.2877, 0.2324]), np.array([0.2856, 0.3910, 0.4174]), np.array([0.5291, 0.4075, 0.3117]), np.array([0.2339, 0.2155, 0.1140]), np.array([0.5008, 0.3293, 0.1979]), np.array([0.3326, 0.2556, 0.0644]), np.array([0.3989, 0.4998, 0.4435]), np.array([0.4962, 0.4428, 0.4358]), np.array([0.2040, 0.1696, 0.0579]), np.array([0.3270, 0.5033, 0.2307]), np.array([0.5709, 0.3298, 0.1268]), np.array([0.4694, 0.4732, 0.6081]), np.array([0.4177, 0.2704, 0.2007]), np.array([0.2151, 0.3037, 0.1903]), np.array([0.3488, 0.3628, 0.9129]), np.array([0.3451, 0.3596, 0.5885]), np.array([0.3446, 0.3590, 0.3595]), np.array([0.3438, 0.3589, 0.1912]), np.array([0.3423, 0.3576, 0.0893]), np.array([0.3439, 0.3565, 0.0320]), ])) CCS_ILLUMINANT_BABELCOLOR_AVERAGE = ( CCS_ILLUMINANTS['CIE 1931 2 Degree Standard Observer']['ICC D50']) """ *BabelColor Average* illuminant. CCS_ILLUMINANT_BABELCOLOR_AVERAGE : ndarray """ CCS_BABELCOLOR_AVERAGE = ColourChecker('BabelColor Average', DATA_BABELCOLOR_AVERAGE, CCS_ILLUMINANT_BABELCOLOR_AVERAGE) """ Average data derived from measurements of 30 *ColorChecker Classic* charts. CCS_BABELCOLOR_AVERAGE : ColourChecker """ DATA_COLORCHECKER24_BEFORE_NOV2014 = OrderedDict( zip(SAMPLE_LABELS_COLORCHECKER_CLASSIC, [ np.array([37.986, 13.555, 14.059]), np.array([65.711, 18.13, 17.81]), np.array([49.927, -4.88, -21.905]), np.array([43.139, -13.095, 21.905]), np.array([55.112, 8.844, -25.399]), np.array([70.719, -33.397, -0.199]), np.array([62.661, 36.067, 57.096]), np.array([40.02, 10.41, -45.964]), np.array([51.124, 48.239, 16.248]), np.array([30.325, 22.976, -21.587]), np.array([72.532, -23.709, 57.255]), np.array([71.941, 19.363, 67.857]), np.array([28.778, 14.179, -50.297]), np.array([55.261, -38.342, 31.37]), np.array([42.101, 53.378, 28.19]), np.array([81.733, 4.039, 79.819]), np.array([51.935, 49.986, -14.574]), np.array([51.038, -28.631, -28.638]), np.array([96.539, -0.425, 1.186]), np.array([81.257, -0.638, -0.335]), np.array([66.766, -0.734, -0.504]), np.array([50.867, -0.153, -0.27]), np.array([35.656, -0.421, -1.231]), np.array([20.461, -0.079, -0.973]), ])) """ *ColorChecker24 - Before November 2014* illuminant. Notes ----- - *X-Rite* data is given as *CIE L\\*a\\*b\\** colourspace values under *CIE Illuminant D Series D50* for the *CIE 1931 2 Degree Standard Observer*. DATA_COLORCHECKER24_BEFORE_NOV2014 : ndarray """ DATA_COLORCHECKER24_BEFORE_NOV2014 = OrderedDict( zip( SAMPLE_LABELS_COLORCHECKER_CLASSIC, XYZ_to_xyY( Lab_to_XYZ( list(DATA_COLORCHECKER24_BEFORE_NOV2014.values()), CCS_ILLUMINANTS['CIE 1931 2 Degree Standard Observer'][ 'ICC D50'])))) CCS_ILLUMINANT_COLORCHECKER24_BEFORE_NOV2014 = ( CCS_ILLUMINANTS['CIE 1931 2 Degree Standard Observer']['ICC D50']) """ *ColorChecker24 - Before November 2014* illuminant. CCS_ILLUMINANT_COLORCHECKER24_BEFORE_NOV2014 : ndarray """ CCS_COLORCHECKER24_BEFORE_NOV2014 = ColourChecker( 'ColorChecker24 - Before November 2014', DATA_COLORCHECKER24_BEFORE_NOV2014, CCS_ILLUMINANT_COLORCHECKER24_BEFORE_NOV2014) """ Reference *ColorChecker Classic* data from *X-Rite (2015)*. Notes ----- - The rounded *ColorChecker24 - Before November 2014* values should match the *ColorChecker Classic 2005* values. They are given for reference of the original *CIE L\\*a\\*b\\** colourspace values. CCS_COLORCHECKER24_BEFORE_NOV2014 : ColourChecker """ DATA_COLORCHECKER24_AFTER_NOV2014 = OrderedDict(( ('dark skin', np.array([37.54, 14.37, 14.92])), ('light skin', np.array([64.66, 19.27, 17.5])), ('blue sky', np.array([49.32, -3.82, -22.54])), ('foliage', np.array([43.46, -12.74, 22.72])), ('blue flower', np.array([54.94, 9.61, -24.79])), ('bluish green', np.array([70.48, -32.26, -0.37])), ('orange', np.array([62.73, 35.83, 56.5])), ('purplish blue', np.array([39.43, 10.75, -45.17])), ('moderate red', np.array([50.57, 48.64, 16.67])), ('purple', np.array([30.1, 22.54, -20.87])), ('yellow green', np.array([71.77, -24.13, 58.19])), ('orange yellow', np.array([71.51, 18.24, 67.37])), ('blue', np.array([28.37, 15.42, -49.8])), ('green', np.array([54.38, -39.72, 32.27])), ('red', np.array([42.43, 51.05, 28.62])), ('yellow', np.array([81.8, 2.67, 80.41])), ('magenta', np.array([50.63, 51.28, -14.12])), ('cyan', np.array([49.57, -29.71, -28.32])), ('white 9.5 (.05 D)', np.array([95.19, -1.03, 2.93])), ('neutral 8 (.23 D)', np.array([81.29, -0.57, 0.44])), ('neutral 6.5 (.44 D)', np.array([66.89, -0.75, -0.06])), ('neutral 5 (.70 D)', np.array([50.76, -0.13, 0.14])), ('neutral 3.5 (1.05 D)', np.array([35.63, -0.46, -0.48])), ('black 2 (1.5 D)', np.array([20.64, 0.07, -0.46])), )) """ *ColorChecker24 - After November 2014* illuminant. Notes ----- - *X-Rite* data is given as *CIE L\\*a\\*b\\** colourspace values under *CIE Illuminant D Series D50* for the *CIE 1931 2 Degree Standard Observer*. DATA_COLORCHECKER24_AFTER_NOV2014 : ndarray """ DATA_COLORCHECKER24_AFTER_NOV2014 = OrderedDict( zip( DATA_COLORCHECKER24_AFTER_NOV2014.keys(), XYZ_to_xyY( Lab_to_XYZ( list(DATA_COLORCHECKER24_AFTER_NOV2014.values()), CCS_ILLUMINANTS['CIE 1931 2 Degree Standard Observer'][ 'ICC D50'])))) CCS_ILLUMINANT_COLORCHECKER24_AFTER_NOV2014 = ( CCS_ILLUMINANTS['CIE 1931 2 Degree Standard Observer']['ICC D50']) """ *ColorChecker24 - After November 2014* illuminant. CCS_ILLUMINANT_COLORCHECKER24_AFTER_NOV2014 : ndarray """ CCS_COLORCHECKER24_AFTER_NOV2014 = ColourChecker( 'ColorChecker24 - After November 2014', DATA_COLORCHECKER24_AFTER_NOV2014, CCS_ILLUMINANT_COLORCHECKER24_AFTER_NOV2014) """ Reference *ColorChecker Classic* data from *X-Rite (2015)* and matching the *ColorChecker Classic* edition after November 2014. CCS_COLORCHECKER24_AFTER_NOV2014 : ColourChecker """ CCS_COLOURCHECKERS = CaseInsensitiveMapping({ 'ColorChecker 1976': CCS_COLORCHECKER1976, 'ColorChecker 2005': CCS_COLORCHECKER2005, 'BabelColor Average': CCS_BABELCOLOR_AVERAGE, 'ColorChecker24 - Before November 2014': CCS_COLORCHECKER24_BEFORE_NOV2014, 'ColorChecker24 - After November 2014': CCS_COLORCHECKER24_AFTER_NOV2014, }) CCS_COLOURCHECKERS.__doc__ = """ Chromaticity coordinates of the colour checkers. References ---------- :cite:`BabelColor2012b`, :cite:`BabelColor2012c`, :cite:`X-Rite2016` CCS_COLOURCHECKERS : CaseInsensitiveMapping **{'ColorChecker 1976', 'ColorChecker 2005', 'BabelColor Average', 'ColorChecker24 - Before November 2014', 'ColorChecker24 - After November 2014'}** Aliases: - 'babel_average': 'BabelColor Average' - 'cc2005': 'ColorChecker 2005' - 'ccb2014': 'ColorChecker24 - Before November 2014' - 'cca2014': 'ColorChecker24 - After November 2014' """ CCS_COLOURCHECKERS['babel_average'] = CCS_COLOURCHECKERS['BabelColor Average'] CCS_COLOURCHECKERS['cc2005'] = CCS_COLOURCHECKERS['ColorChecker 2005'] CCS_COLOURCHECKERS['ccb2014'] = CCS_COLOURCHECKERS[ 'ColorChecker24 - Before November 2014'] CCS_COLOURCHECKERS['cca2014'] = CCS_COLOURCHECKERS[ 'ColorChecker24 - After November 2014']