Source code for colour.models.dataset.dci_p3

#!/usr/bin/env python
# -*- coding: utf-8 -*-

"""
DCI-P3 Colourspace
==================

Defines the *DCI-P3* colourspace:

-   :attr:`DCI_P3_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]  Hewlett-Packard Development Company. (2009). Understanding the HP
        DreamColor LP2480zx DCI-P3 Emulation Color Space. Retrieved from
        http://www.hp.com/united-states/campaigns/workstations/pdfs/lp2480zx-dci--p3-emulation.pdf  # 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 - 2014 - Colour Developers'
__license__ = 'New BSD License - http://opensource.org/licenses/BSD-3-Clause'
__maintainer__ = 'Colour Developers'
__email__ = '[email protected]'
__status__ = 'Production'

__all__ = ['DCI_P3_PRIMARIES',
           'DCI_P3_ILLUMINANT',
           'DCI_P3_WHITEPOINT',
           'DCI_P3_TO_XYZ_MATRIX',
           'XYZ_TO_DCI_P3_MATRIX',
           'DCI_P3_TRANSFER_FUNCTION',
           'DCI_P3_INVERSE_TRANSFER_FUNCTION',
           'DCI_P3_COLOURSPACE']

DCI_P3_PRIMARIES = np.array(
    [[0.680, 0.320],
     [0.265, 0.690],
     [0.150, 0.060]])
"""
*DCI-P3* colourspace primaries.

DCI_P3_PRIMARIES : ndarray, (3, 2)
"""

DCI_P3_ILLUMINANT = 'D65'
"""
*DCI-P3* colourspace whitepoint name as illuminant.

DCI_P3_ILLUMINANT : unicode

Notes
-----
-   We don't know which whitepoint DCI-P3 is officially using and are assuming
    *CIE Illuminant D Series* *D65*. Hewlett-Packard Development Company
    (2009) mentions *(0.314, 0.351)* in their emulation for the
    *HP DreamColor LP2480zx Professional Display*.
"""

DCI_P3_WHITEPOINT = ILLUMINANTS.get(
    'CIE 1931 2 Degree Standard Observer').get(DCI_P3_ILLUMINANT)
"""
*DCI-P3* colourspace whitepoint.

DCI_P3_WHITEPOINT : tuple
"""

DCI_P3_TO_XYZ_MATRIX = normalised_primary_matrix(
    DCI_P3_PRIMARIES,
    DCI_P3_WHITEPOINT)
"""
*DCI-P3* colourspace to *CIE XYZ* colourspace matrix.

DCI_P3_TO_XYZ_MATRIX : array_like, (3, 3)
"""

XYZ_TO_DCI_P3_MATRIX = np.linalg.inv(DCI_P3_TO_XYZ_MATRIX)
"""
*CIE XYZ* colourspace to *DCI-P3* colourspace matrix.

XYZ_TO_DCI_P3_MATRIX : array_like, (3, 3)
"""


def _dci_p3_transfer_function(value):
    """
    Defines the *DCI-P3* value colourspace transfer function.

    Parameters
    ----------
    value : numeric
        value.

    Returns
    -------
    numeric
        Companded value.
    """

    return value


def _dci_p3_inverse_transfer_function(value):
    """
    Defines the *DCI-P3* value colourspace inverse transfer function.

    Parameters
    ----------
    value : numeric
        value.

    Returns
    -------
    numeric
        Companded value.
    """

    return value


DCI_P3_TRANSFER_FUNCTION = _dci_p3_transfer_function
"""
Transfer function from linear to *DCI-P3* colourspace.

DCI_P3_TRANSFER_FUNCTION : object
"""

DCI_P3_INVERSE_TRANSFER_FUNCTION = _dci_p3_inverse_transfer_function
"""
Inverse transfer function from *DCI-P3* colourspace to linear.

DCI_P3_INVERSE_TRANSFER_FUNCTION : object
"""

DCI_P3_COLOURSPACE = RGB_Colourspace(
    'DCI-P3',
    DCI_P3_PRIMARIES,
    DCI_P3_WHITEPOINT,
    DCI_P3_ILLUMINANT,
    DCI_P3_TO_XYZ_MATRIX,
    XYZ_TO_DCI_P3_MATRIX,
    DCI_P3_TRANSFER_FUNCTION,
    DCI_P3_INVERSE_TRANSFER_FUNCTION)
"""
*DCI-P3* colourspace.

DCI_P3_COLOURSPACE : RGB_Colourspace
"""