text: # -*- coding: utf-8 -*-
  """
  SMPTE 240M Colourspace
  ======================
  
  Defines the *SMPTE 240M* colourspace:
  
  -   :attr:`colour.models.SMPTE_240M_COLOURSPACE`.
  
  See Also
  --------
  `RGB Colourspaces Jupyter Notebook
  <http://nbviewer.jupyter.org/github/colour-science/colour-notebooks/\
  blob/master/notebooks/models/rgb.ipynb>`_
  
  References
  ----------
  -   :cite:`SocietyofMotionPictureandTelevisionEngineers1999b` : Society of
      Motion Picture and Television Engineers. (1999). ANSI/SMPTE 240M-1995 -
      Signal Parameters - 1125-Line High-Definition Production Systems. Retrieved
      from http://car.france3.mars.free.fr/HD/INA- 26 jan 06/\
  SMPTE normes et confs/s240m.pdf
  """
  
  from __future__ import division, unicode_literals
  
  import numpy as np
  
  from colour.colorimetry import ILLUMINANTS
  from colour.models.rgb import (RGB_Colourspace, normalised_primary_matrix,
                                 oetf_SMPTE240M, eotf_SMPTE240M)
  
  __author__ = 'Colour Developers'
  __copyright__ = 'Copyright (C) 2013-2019 - Colour Developers'
  __license__ = 'New BSD License - https://opensource.org/licenses/BSD-3-Clause'
  __maintainer__ = 'Colour Developers'
  __email__ = 'colour-developers@colour-science.org'
  __status__ = 'Production'
  
  __all__ = [
      'SMPTE_240M_PRIMARIES', 'SMPTE_240M_WHITEPOINT_NAME',
      'SMPTE_240M_WHITEPOINT', 'SMPTE_240M_TO_XYZ_MATRIX',
      'XYZ_TO_SMPTE_240M_MATRIX', 'SMPTE_240M_COLOURSPACE'
  ]
  
  SMPTE_240M_PRIMARIES = np.array([
      [0.6300, 0.3400],
      [0.3100, 0.5950],
      [0.1550, 0.0700],
  ])
  """
  *SMPTE 240M* colourspace primaries.
  
  SMPTE_240M_PRIMARIES : ndarray, (3, 2)
  """
  
  SMPTE_240M_WHITEPOINT_NAME = 'D65'
  """
  *SMPTE 240M* colourspace whitepoint name.
  
  SMPTE_240M_WHITEPOINT_NAME : unicode
  """
  
  SMPTE_240M_WHITEPOINT = (ILLUMINANTS['CIE 1931 2 Degree Standard Observer'][
      SMPTE_240M_WHITEPOINT_NAME])
  """
  *SMPTE 240M* colourspace whitepoint.
  
  SMPTE_240M_WHITEPOINT : ndarray
  """
  
  SMPTE_240M_TO_XYZ_MATRIX = normalised_primary_matrix(SMPTE_240M_PRIMARIES,
                                                       SMPTE_240M_WHITEPOINT)
  """
  *SMPTE 240M* colourspace to *CIE XYZ* tristimulus values matrix.
  
  SMPTE_240M_TO_XYZ_MATRIX : array_like, (3, 3)
  """
  
  XYZ_TO_SMPTE_240M_MATRIX = np.linalg.inv(SMPTE_240M_TO_XYZ_MATRIX)
  """
  *CIE XYZ* tristimulus values to *SMPTE 240M* colourspace matrix.
  
  XYZ_TO_SMPTE_240M_MATRIX : array_like, (3, 3)
  """
  
  SMPTE_240M_COLOURSPACE = RGB_Colourspace(
      'SMPTE 240M',
      SMPTE_240M_PRIMARIES,
      SMPTE_240M_WHITEPOINT,
      SMPTE_240M_WHITEPOINT_NAME,
      SMPTE_240M_TO_XYZ_MATRIX,
      XYZ_TO_SMPTE_240M_MATRIX,
      oetf_SMPTE240M,
      eotf_SMPTE240M,
  )
  SMPTE_240M_COLOURSPACE.__doc__ = """
  *SMPTE 240M* colourspace.
  
  References
  ----------
  :cite:`SocietyofMotionPictureandTelevisionEngineers1999b`,
  
  SMPTE_240M_COLOURSPACE : RGB_Colourspace
  """
  