#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
RED Colourspaces
================
Defines the *RED* colourspaces:
- :attr:`RED_COLOR_COLOURSPACE`
- :attr:`RED_COLOR_2_COLOURSPACE`
- :attr:`RED_COLOR_3_COLOURSPACE`
- :attr:`RED_COLOR_4_COLOURSPACE`
- :attr:`DRAGON_COLOR_COLOURSPACE`
- :attr:`DRAGON_COLOR_2_COLOURSPACE`
See Also
--------
`RGB Colourspaces IPython Notebook
<http://nbviewer.ipython.org/github/colour-science/colour-ipython/blob/master/notebooks/models/rgb.ipynb>`_ # noqa
References
----------
.. [1] Mansencal, T. (2015). RED Colourspaces Derivation. Retrieved May 20,
2015, from
https://www.colour-science.org/blog_red_colourspaces_derivation.php
.. [2] Sony Imageworks. (2012). make.py. Retrieved November 27, 2014, from
https://github.com/imageworks/OpenColorIO-Configs/blob/master/nuke-default/make.py # noqa
"""
from __future__ import division, unicode_literals
import numpy as np
from colour.colorimetry import ILLUMINANTS
from colour.models import RGB_Colourspace, normalised_primary_matrix
__author__ = 'Colour Developers'
__copyright__ = 'Copyright (C) 2013 - 2015 - Colour Developers'
__license__ = 'New BSD License - http://opensource.org/licenses/BSD-3-Clause'
__maintainer__ = 'Colour Developers'
__email__ = 'colour-science@googlegroups.com'
__status__ = 'Production'
__all__ = ['RED_COLOR_2_PRIMARIES',
'RED_COLOR_2_ILLUMINANT',
'RED_COLOR_2_WHITEPOINT',
'RED_COLOR_2_TO_XYZ_MATRIX',
'XYZ_TO_RED_COLOR_2_MATRIX',
'RED_LOG_FILM_TRANSFER_FUNCTION',
'RED_LOG_FILM_INVERSE_TRANSFER_FUNCTION',
'RED_COLOR_2_COLOURSPACE',
'RED_COLOR_3_PRIMARIES',
'RED_COLOR_3_ILLUMINANT',
'RED_COLOR_3_WHITEPOINT',
'RED_COLOR_3_TO_XYZ_MATRIX',
'XYZ_TO_RED_COLOR_3_MATRIX',
'RED_COLOR_3_COLOURSPACE',
'RED_COLOR_4_PRIMARIES',
'RED_COLOR_4_ILLUMINANT',
'RED_COLOR_4_WHITEPOINT',
'RED_COLOR_4_TO_XYZ_MATRIX',
'XYZ_TO_RED_COLOR_4_MATRIX',
'RED_COLOR_4_COLOURSPACE',
'DRAGON_COLOR_PRIMARIES',
'DRAGON_COLOR_ILLUMINANT',
'DRAGON_COLOR_WHITEPOINT',
'DRAGON_COLOR_TO_XYZ_MATRIX',
'XYZ_TO_DRAGON_COLOR_MATRIX',
'DRAGON_COLOR_COLOURSPACE',
'DRAGON_COLOR_2_PRIMARIES',
'DRAGON_COLOR_2_ILLUMINANT',
'DRAGON_COLOR_2_WHITEPOINT',
'DRAGON_COLOR_2_TO_XYZ_MATRIX',
'XYZ_TO_DRAGON_COLOR_2_MATRIX',
'DRAGON_COLOR_2_COLOURSPACE']
RED_COLOR_PRIMARIES = np.array(
[[0.6997470012907312, 0.3290469303126368],
[0.3042640390235472, 0.6236411451291149],
[0.1349139612964870, 0.0347174412813451]])
"""
*REDcolor* colourspace primaries.
RED_COLOR_PRIMARIES : ndarray, (3, 2)
"""
RED_COLOR_ILLUMINANT = 'D65'
"""
*REDcolor* colourspace whitepoint name as illuminant.
RED_COLOR_ILLUMINANT : unicode
"""
RED_COLOR_WHITEPOINT = ILLUMINANTS.get(
'CIE 1931 2 Degree Standard Observer').get(RED_COLOR_ILLUMINANT)
"""
*REDcolor* colourspace whitepoint.
RED_COLOR_WHITEPOINT : tuple
"""
RED_COLOR_TO_XYZ_MATRIX = normalised_primary_matrix(
RED_COLOR_PRIMARIES, RED_COLOR_WHITEPOINT)
"""
*REDcolor* colourspace to *CIE XYZ* tristimulus values matrix.
RED_COLOR_XYZ_MATRIX : array_like, (3, 3)
"""
XYZ_TO_RED_COLOR_MATRIX = np.linalg.inv(RED_COLOR_TO_XYZ_MATRIX)
"""
*CIE XYZ* tristimulus values to *REDcolor* colourspace matrix.
XYZ_TO_RED_COLOR_MATRIX : array_like, (3, 3)
"""
def _linear_to_red_log_film(
value,
black_offset=10 ** ((0 - 1023) / 511)):
"""
Defines the *REDLogFilm* transfer function.
Parameters
----------
value : numeric or array_like
Value.
black_offset : numeric or array_like
Black offset.
Returns
-------
numeric or ndarray
Companded value.
"""
value = np.asarray(value)
return ((1023 +
511 * np.log10(value * (1 - black_offset) + black_offset)) / 1023)
def _red_log_film_to_linear(
value,
black_offset=10 ** ((0 - 1023) / 511)):
"""
Defines the *REDLogFilm* inverse transfer function.
Parameters
----------
value : numeric or array_like
Value.
black_offset : numeric or array_like
Black offset.
Returns
-------
numeric or ndarray
Companded value.
"""
value = np.asarray(value)
return (((10 **
((1023 * value - 1023) / 511)) - black_offset) /
(1 - black_offset))
RED_LOG_FILM_TRANSFER_FUNCTION = _linear_to_red_log_film
"""
Transfer function from linear to *REDLogFilm*.
RED_LOG_FILM_TRANSFER_FUNCTION : object
"""
RED_LOG_FILM_INVERSE_TRANSFER_FUNCTION = _red_log_film_to_linear
"""
Inverse transfer function from *REDLogFilm* to linear.
RED_LOG_FILM_INVERSE_TRANSFER_FUNCTION : object
"""
RED_COLOR_COLOURSPACE = RGB_Colourspace(
'REDcolor',
RED_COLOR_PRIMARIES,
RED_COLOR_WHITEPOINT,
RED_COLOR_ILLUMINANT,
RED_COLOR_TO_XYZ_MATRIX,
XYZ_TO_RED_COLOR_MATRIX,
RED_LOG_FILM_TRANSFER_FUNCTION,
RED_LOG_FILM_INVERSE_TRANSFER_FUNCTION)
"""
*REDcolor* colourspace.
RED_COLOR_COLOURSPACE : RGB_Colourspace
"""
RED_COLOR_2_PRIMARIES = np.array(
[[0.8786825104761286, 0.3249640074099105],
[0.3008887143674324, 0.6790547557905675],
[0.0953986946056151, -0.0293793268343266]])
"""
*REDcolor2* colourspace primaries.
RED_COLOR_2_PRIMARIES : ndarray, (3, 2)
"""
RED_COLOR_2_ILLUMINANT = RED_COLOR_ILLUMINANT
"""
*REDcolor2* colourspace whitepoint name as illuminant.
RED_COLOR_2_ILLUMINANT : unicode
"""
RED_COLOR_2_WHITEPOINT = RED_COLOR_WHITEPOINT
"""
*REDcolor2* colourspace whitepoint.
RED_COLOR_2_WHITEPOINT : tuple
"""
RED_COLOR_2_TO_XYZ_MATRIX = normalised_primary_matrix(
RED_COLOR_2_PRIMARIES, RED_COLOR_2_WHITEPOINT)
"""
*REDcolor2* colourspace to *CIE XYZ* tristimulus values matrix.
RED_COLOR_2_XYZ_MATRIX : array_like, (3, 3)
"""
XYZ_TO_RED_COLOR_2_MATRIX = np.linalg.inv(RED_COLOR_2_TO_XYZ_MATRIX)
"""
*CIE XYZ* tristimulus values to *REDcolor2* colourspace matrix.
XYZ_TO_RED_COLOR_2_MATRIX : array_like, (3, 3)
"""
RED_COLOR_2_COLOURSPACE = RGB_Colourspace(
'REDcolor2',
RED_COLOR_2_PRIMARIES,
RED_COLOR_2_WHITEPOINT,
RED_COLOR_2_ILLUMINANT,
RED_COLOR_2_TO_XYZ_MATRIX,
XYZ_TO_RED_COLOR_2_MATRIX,
RED_LOG_FILM_TRANSFER_FUNCTION,
RED_LOG_FILM_INVERSE_TRANSFER_FUNCTION)
"""
*REDcolor2* colourspace.
RED_COLOR_2_COLOURSPACE : RGB_Colourspace
"""
RED_COLOR_3_PRIMARIES = np.array(
[[0.7011810359064131, 0.3290141555830101],
[0.3006003046515633, 0.6837888342685519],
[0.1081544556240110, -0.0086881757866604]])
"""
*REDcolor3* colourspace primaries.
RED_COLOR_3_PRIMARIES : ndarray, (3, 2)
"""
RED_COLOR_3_ILLUMINANT = RED_COLOR_ILLUMINANT
"""
*REDcolor3* colourspace whitepoint name as illuminant.
RED_COLOR_3_ILLUMINANT : unicode
"""
RED_COLOR_3_WHITEPOINT = RED_COLOR_WHITEPOINT
"""
*REDcolor3* colourspace whitepoint.
RED_COLOR_3_WHITEPOINT : tuple
"""
RED_COLOR_3_TO_XYZ_MATRIX = normalised_primary_matrix(
RED_COLOR_3_PRIMARIES, RED_COLOR_3_WHITEPOINT)
"""
*REDcolor3* colourspace to *CIE XYZ* tristimulus values matrix.
RED_COLOR_3_TO_XYZ_MATRIX : array_like, (3, 3)
"""
XYZ_TO_RED_COLOR_3_MATRIX = np.linalg.inv(RED_COLOR_3_TO_XYZ_MATRIX)
"""
*CIE XYZ* tristimulus values to *REDcolor3* colourspace matrix.
XYZ_TO_RED_COLOR_3_MATRIX : array_like, (3, 3)
"""
RED_COLOR_3_COLOURSPACE = RGB_Colourspace(
'REDcolor3',
RED_COLOR_3_PRIMARIES,
RED_COLOR_3_WHITEPOINT,
RED_COLOR_3_ILLUMINANT,
RED_COLOR_3_TO_XYZ_MATRIX,
XYZ_TO_RED_COLOR_3_MATRIX,
RED_LOG_FILM_TRANSFER_FUNCTION,
RED_LOG_FILM_INVERSE_TRANSFER_FUNCTION)
"""
*REDcolor3* colourspace.
RED_COLOR_3_COLOURSPACE : RGB_Colourspace
"""
RED_COLOR_4_PRIMARIES = np.array(
[[0.7011805918919830, 0.3290136991155385],
[0.3006003955293892, 0.6837888242572663],
[0.1453319462288687, 0.0516168036226188]])
"""
*REDcolor4* colourspace primaries.
RED_COLOR_4_PRIMARIES : ndarray, (3, 2)
"""
RED_COLOR_4_ILLUMINANT = RED_COLOR_ILLUMINANT
"""
*REDcolor4* colourspace whitepoint name as illuminant.
RED_COLOR_4_ILLUMINANT : unicode
"""
RED_COLOR_4_WHITEPOINT = RED_COLOR_WHITEPOINT
"""
*REDcolor4* colourspace whitepoint.
RED_COLOR_4_WHITEPOINT : tuple
"""
RED_COLOR_4_TO_XYZ_MATRIX = normalised_primary_matrix(
RED_COLOR_4_PRIMARIES, RED_COLOR_4_WHITEPOINT)
"""
*REDcolor4* colourspace to *CIE XYZ* tristimulus values matrix.
RED_COLOR_4_TO_XYZ_MATRIX : array_like, (3, 3)
"""
XYZ_TO_RED_COLOR_4_MATRIX = np.linalg.inv(RED_COLOR_4_TO_XYZ_MATRIX)
"""
*CIE XYZ* tristimulus values to *REDcolor4* colourspace matrix.
XYZ_TO_RED_COLOR_4_MATRIX : array_like, (3, 3)
"""
RED_COLOR_4_COLOURSPACE = RGB_Colourspace(
'REDcolor4',
RED_COLOR_4_PRIMARIES,
RED_COLOR_4_WHITEPOINT,
RED_COLOR_4_ILLUMINANT,
RED_COLOR_4_TO_XYZ_MATRIX,
XYZ_TO_RED_COLOR_4_MATRIX,
RED_LOG_FILM_TRANSFER_FUNCTION,
RED_LOG_FILM_INVERSE_TRANSFER_FUNCTION)
"""
*REDcolor4* colourspace.
RED_COLOR_4_COLOURSPACE : RGB_Colourspace
"""
DRAGON_COLOR_PRIMARIES = np.array(
[[0.7530442227847470, 0.3278305766815993],
[0.2995702284807185, 0.7006993219557512],
[0.0796420667349588, -0.0549379510887859]])
"""
*DRAGONcolor* colourspace primaries.
DRAGON_COLOR_PRIMARIES : ndarray, (3, 2)
"""
DRAGON_COLOR_ILLUMINANT = RED_COLOR_ILLUMINANT
"""
*DRAGONcolor* colourspace whitepoint name as illuminant.
DRAGON_COLOR_ILLUMINANT : unicode
"""
DRAGON_COLOR_WHITEPOINT = RED_COLOR_WHITEPOINT
"""
*DRAGONcolor* colourspace whitepoint.
DRAGON_COLOR_WHITEPOINT : tuple
"""
DRAGON_COLOR_TO_XYZ_MATRIX = normalised_primary_matrix(
DRAGON_COLOR_PRIMARIES, DRAGON_COLOR_WHITEPOINT)
"""
*DRAGONcolor* colourspace to *CIE XYZ* tristimulus values matrix.
DRAGON_COLOR_TO_XYZ_MATRIX : array_like, (3, 3)
"""
XYZ_TO_DRAGON_COLOR_MATRIX = np.linalg.inv(DRAGON_COLOR_TO_XYZ_MATRIX)
"""
*CIE XYZ* tristimulus values to *DRAGONcolor* colourspace matrix.
XYZ_TO_DRAGON_COLOR_MATRIX : array_like, (3, 3)
"""
DRAGON_COLOR_COLOURSPACE = RGB_Colourspace(
'DRAGONcolor',
DRAGON_COLOR_PRIMARIES,
DRAGON_COLOR_WHITEPOINT,
DRAGON_COLOR_ILLUMINANT,
DRAGON_COLOR_TO_XYZ_MATRIX,
XYZ_TO_DRAGON_COLOR_MATRIX,
RED_LOG_FILM_TRANSFER_FUNCTION,
RED_LOG_FILM_INVERSE_TRANSFER_FUNCTION)
"""
*DRAGONcolor* colourspace.
DRAGON_COLOR_COLOURSPACE : RGB_Colourspace
"""
DRAGON_COLOR_2_PRIMARIES = np.array(
[[0.7530444911429997, 0.3278310295132136],
[0.2995704904513070, 0.7006994156139956],
[0.1450115842779754, 0.0510971250878873]])
"""
*DRAGONcolor2* colourspace primaries.
DRAGON_COLOR_2_PRIMARIES : ndarray, (3, 2)
"""
DRAGON_COLOR_2_ILLUMINANT = RED_COLOR_ILLUMINANT
"""
*DRAGONcolor2* colourspace whitepoint name as illuminant.
DRAGON_COLOR_2_ILLUMINANT : unicode
"""
DRAGON_COLOR_2_WHITEPOINT = RED_COLOR_WHITEPOINT
"""
*DRAGONcolor2* colourspace whitepoint.
DRAGON_COLOR_2_WHITEPOINT : tuple
"""
DRAGON_COLOR_2_TO_XYZ_MATRIX = normalised_primary_matrix(
DRAGON_COLOR_2_PRIMARIES, DRAGON_COLOR_2_WHITEPOINT)
"""
*DRAGONcolor2* colourspace to *CIE XYZ* tristimulus values matrix.
DRAGON_COLOR_2_TO_XYZ_MATRIX : array_like, (3, 3)
"""
XYZ_TO_DRAGON_COLOR_2_MATRIX = np.linalg.inv(DRAGON_COLOR_2_TO_XYZ_MATRIX)
"""
*CIE XYZ* tristimulus values to *DRAGONcolor2* colourspace matrix.
XYZ_TO_DRAGON_COLOR_2_MATRIX : array_like, (3, 3)
"""
DRAGON_COLOR_2_COLOURSPACE = RGB_Colourspace(
'DRAGONcolor2',
DRAGON_COLOR_2_PRIMARIES,
DRAGON_COLOR_2_WHITEPOINT,
DRAGON_COLOR_2_ILLUMINANT,
DRAGON_COLOR_2_TO_XYZ_MATRIX,
XYZ_TO_DRAGON_COLOR_2_MATRIX,
RED_LOG_FILM_TRANSFER_FUNCTION,
RED_LOG_FILM_INVERSE_TRANSFER_FUNCTION)
"""
*DRAGONcolor2* colourspace.
DRAGON_COLOR_2_COLOURSPACE : RGB_Colourspace
"""
Colour 0.3