#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Adobe Wide Gamut RGB Colourspace
================================
Defines the *Adobe Wide Gamut RGB* colourspace:
- :attr:`ADOBE_WIDE_GAMUT_RGB_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] Wikipedia. (n.d.). Wide-gamut RGB color space. Retrieved April 13,
2014, from http://en.wikipedia.org/wiki/Wide-gamut_RGB_color_space
"""
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__ = ['ADOBE_WIDE_GAMUT_RGB_PRIMARIES',
'ADOBE_WIDE_GAMUT_RGB_ILLUMINANT',
'ADOBE_WIDE_GAMUT_RGB_WHITEPOINT',
'ADOBE_WIDE_GAMUT_RGB_TO_XYZ_MATRIX',
'XYZ_TO_ADOBE_WIDE_GAMUT_RGB_MATRIX',
'ADOBE_WIDE_GAMUT_RGB_TRANSFER_FUNCTION',
'ADOBE_WIDE_GAMUT_RGB_INVERSE_TRANSFER_FUNCTION',
'ADOBE_WIDE_GAMUT_RGB_COLOURSPACE']
ADOBE_WIDE_GAMUT_RGB_PRIMARIES = np.array(
[[0.7347, 0.2653],
[0.1152, 0.8264],
[0.1566, 0.0177]])
"""
*Adobe Wide Gamut RGB* colourspace primaries.
ADOBE_WIDE_GAMUT_RGB_PRIMARIES : ndarray, (3, 2)
"""
ADOBE_WIDE_GAMUT_RGB_ILLUMINANT = 'D50'
"""
*Adobe Wide Gamut RGB* colourspace whitepoint name as illuminant.
ADOBE_WIDE_GAMUT_RGB_ILLUMINANT : unicode
"""
ADOBE_WIDE_GAMUT_RGB_WHITEPOINT = ILLUMINANTS.get(
'CIE 1931 2 Degree Standard Observer').get(
ADOBE_WIDE_GAMUT_RGB_ILLUMINANT)
"""
*Adobe Wide Gamut RGB* colourspace whitepoint.
ADOBE_WIDE_GAMUT_RGB_WHITEPOINT : tuple
"""
ADOBE_WIDE_GAMUT_RGB_TO_XYZ_MATRIX = normalised_primary_matrix(
ADOBE_WIDE_GAMUT_RGB_PRIMARIES,
ADOBE_WIDE_GAMUT_RGB_WHITEPOINT)
"""
*Adobe Wide Gamut RGB* colourspace to *CIE XYZ* colourspace matrix.
ADOBE_WIDE_GAMUT_RGB_TO_XYZ_MATRIX : array_like, (3, 3)
"""
XYZ_TO_ADOBE_WIDE_GAMUT_RGB_MATRIX = np.linalg.inv(
ADOBE_WIDE_GAMUT_RGB_TO_XYZ_MATRIX)
"""
*CIE XYZ* colourspace to *Adobe Wide Gamut RGB* colourspace matrix.
XYZ_TO_ADOBE_WIDE_GAMUT_RGB_MATRIX : array_like, (3, 3)
"""
def _adobe_wide_gamut_rgb_transfer_function(value):
"""
Defines the *Adobe Wide Gamut RGB* colourspace transfer function.
Parameters
----------
value : numeric
Value.
Returns
-------
numeric
Companded value.
"""
return value ** (1 / (563 / 256))
def _adobe_wide_gamut_rgb_inverse_transfer_function(value):
"""
Defines the *Adobe Wide Gamut RGB* colourspace inverse transfer
function.
Parameters
----------
value : numeric
Value.
Returns
-------
numeric
Companded value.
"""
return value ** (563 / 256)
ADOBE_WIDE_GAMUT_RGB_TRANSFER_FUNCTION = (
_adobe_wide_gamut_rgb_transfer_function)
"""
Transfer function from linear to *Adobe Wide Gamut RGB* colourspace.
ADOBE_WIDE_GAMUT_RGB_TRANSFER_FUNCTION : object
"""
ADOBE_WIDE_GAMUT_RGB_INVERSE_TRANSFER_FUNCTION = (
_adobe_wide_gamut_rgb_inverse_transfer_function)
"""
Inverse transfer function from *Adobe Wide Gamut RGB* colourspace to linear.
ADOBE_WIDE_GAMUT_RGB_INVERSE_TRANSFER_FUNCTION : object
"""
ADOBE_WIDE_GAMUT_RGB_COLOURSPACE = RGB_Colourspace(
'Adobe Wide Gamut RGB',
ADOBE_WIDE_GAMUT_RGB_PRIMARIES,
ADOBE_WIDE_GAMUT_RGB_WHITEPOINT,
ADOBE_WIDE_GAMUT_RGB_ILLUMINANT,
ADOBE_WIDE_GAMUT_RGB_TO_XYZ_MATRIX,
XYZ_TO_ADOBE_WIDE_GAMUT_RGB_MATRIX,
ADOBE_WIDE_GAMUT_RGB_TRANSFER_FUNCTION,
ADOBE_WIDE_GAMUT_RGB_INVERSE_TRANSFER_FUNCTION)
"""
*Adobe Wide Gamut RGB* colourspace.
ADOBE_WIDE_GAMUT_RGB_COLOURSPACE : RGB_Colourspace
"""
Colour 0.3