#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Cinema Gamut Colourspace
========================
Defines the *Canon* *Cinema Gamut* colourspace:
- :attr:`CINEMA_GAMUT_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] Canon. (2014). EOS C500 Firmware Update. Retrieved January 14, 2015,
from http://www.usa.canon.com/cusa/professional/standard_display/cinema-firmware-c500 # 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__ = ['CINEMA_GAMUT_PRIMARIES',
'CINEMA_GAMUT_ILLUMINANT',
'CINEMA_GAMUT_WHITEPOINT',
'CINEMA_GAMUT_TO_XYZ_MATRIX',
'XYZ_TO_CINEMA_GAMUT_MATRIX',
'CINEMA_GAMUT_TRANSFER_FUNCTION',
'CINEMA_GAMUT_INVERSE_TRANSFER_FUNCTION',
'CINEMA_GAMUT_COLOURSPACE']
CINEMA_GAMUT_PRIMARIES = np.array(
[[0.7400, 0.2700],
[0.1700, 1.1400],
[0.0800, -0.1000]])
"""
*Cinema Gamut* colourspace primaries.
CINEMA_GAMUT_PRIMARIES : ndarray, (3, 2)
"""
CINEMA_GAMUT_ILLUMINANT = 'D65'
"""
*Cinema Gamut* colourspace whitepoint name as illuminant.
CINEMA_GAMUT_ILLUMINANT : unicode
"""
CINEMA_GAMUT_WHITEPOINT = ILLUMINANTS.get(
'CIE 1931 2 Degree Standard Observer').get(CINEMA_GAMUT_ILLUMINANT)
"""
*Cinema Gamut* colourspace whitepoint.
CINEMA_GAMUT_WHITEPOINT : tuple
"""
CINEMA_GAMUT_TO_XYZ_MATRIX = normalised_primary_matrix(CINEMA_GAMUT_PRIMARIES,
CINEMA_GAMUT_WHITEPOINT)
"""
*Cinema Gamut* colourspace to *CIE XYZ* colourspace matrix.
CINEMA_GAMUT_TO_XYZ_MATRIX : array_like, (3, 3)
"""
XYZ_TO_CINEMA_GAMUT_MATRIX = np.linalg.inv(CINEMA_GAMUT_TO_XYZ_MATRIX)
"""
*CIE XYZ* colourspace to *Cinema Gamut* colourspace matrix.
XYZ_TO_CINEMA_GAMUT_MATRIX : array_like, (3, 3)
"""
def _cinema_gamut_transfer_function(value):
"""
Defines the *Cinema Gamut* colourspace transfer function.
Parameters
----------
value : numeric
Value.
Returns
-------
numeric
Companded value.
"""
return value
def _cinema_gamut_inverse_transfer_function(value):
"""
Defines the *Cinema Gamut* colourspace inverse transfer
function.
Parameters
----------
value : numeric
Value.
Returns
-------
numeric
Companded value.
"""
return value
CINEMA_GAMUT_TRANSFER_FUNCTION = _cinema_gamut_transfer_function
"""
Transfer function from linear to *Cinema Gamut* colourspace.
CINEMA_GAMUT_TRANSFER_FUNCTION : object
"""
CINEMA_GAMUT_INVERSE_TRANSFER_FUNCTION = (
_cinema_gamut_inverse_transfer_function)
"""
Inverse transfer function from *Cinema Gamut* colourspace to linear.
CINEMA_GAMUT_INVERSE_TRANSFER_FUNCTION : object
"""
CINEMA_GAMUT_COLOURSPACE = RGB_Colourspace(
'Cinema Gamut',
CINEMA_GAMUT_PRIMARIES,
CINEMA_GAMUT_WHITEPOINT,
CINEMA_GAMUT_ILLUMINANT,
CINEMA_GAMUT_TO_XYZ_MATRIX,
XYZ_TO_CINEMA_GAMUT_MATRIX,
CINEMA_GAMUT_TRANSFER_FUNCTION,
CINEMA_GAMUT_INVERSE_TRANSFER_FUNCTION)
"""
*Cinema Gamut* colourspace.
CINEMA_GAMUT_COLOURSPACE : RGB_Colourspace
"""
Colour 0.3