def _eci_rgb_v2_inverse_transfer_function(value):
"""
Defines the *ECI RGB v2* colourspace inverse transfer function.
Parameters
----------
value : numeric or array_like
Value.
Returns
-------
numeric or ndarray
Companded value.
"""
return luminance_1976(value * 100) / 100
def _eci_rgb_v2_EOCF(value):
"""
Defines the *ECI RGB v2* colourspace electro-optical conversion function.
Parameters
----------
value : numeric or array_like
Value.
Returns
-------
numeric or ndarray
Companded value.
"""
return luminance_1976(value * 100) / 100
def _eci_rgb_v2_EOCF(value):
"""
Defines the *ECI RGB v2* colourspace electro-optical conversion function.
Parameters
----------
value : numeric or array_like
Value.
Returns
-------
numeric or ndarray
Companded value.
"""
return luminance_1976(value * 100) / 100
XYZ_TO_ECI_RGB_V2_MATRIX = np.linalg.inv(ECI_RGB_V2_TO_XYZ_MATRIX)
"""
*CIE XYZ* colourspace to *ECI RGB v2* colourspace matrix.
XYZ_TO_ECI_RGB_V2_MATRIX : array_like, (3, 3)
"""
ECI_RGB_V2_TRANSFER_FUNCTION = lambda x: lightness_1976(x * 100) / 100
"""
Transfer function from linear to *ECI RGB v2* colourspace.
ECI_RGB_V2_TRANSFER_FUNCTION : object
"""
ECI_RGB_V2_INVERSE_TRANSFER_FUNCTION = lambda x: (luminance_1976(x * 100) / 100)
"""
Inverse transfer function from *ECI RGB v2* colourspace to linear.
ECI_RGB_V2_INVERSE_TRANSFER_FUNCTION : object
"""
ECI_RGB_V2_COLOURSPACE = RGB_Colourspace(
"ECI RGB v2",
ECI_RGB_V2_PRIMARIES,
ECI_RGB_V2_WHITEPOINT,
ECI_RGB_V2_TO_XYZ_MATRIX,
XYZ_TO_ECI_RGB_V2_MATRIX,
ECI_RGB_V2_TRANSFER_FUNCTION,
ECI_RGB_V2_INVERSE_TRANSFER_FUNCTION,
)
XYZ_TO_ECI_RGB_V2_MATRIX = np.linalg.inv(ECI_RGB_V2_TO_XYZ_MATRIX)
"""
*CIE XYZ* colourspace to *ECI RGB v2* colourspace matrix.
XYZ_TO_ECI_RGB_V2_MATRIX : array_like, (3, 3)
"""
ECI_RGB_V2_TRANSFER_FUNCTION = lambda x: lightness_1976(x * 100) / 100
"""
Transfer function from linear to *ECI RGB v2* colourspace.
ECI_RGB_V2_TRANSFER_FUNCTION : object
"""
ECI_RGB_V2_INVERSE_TRANSFER_FUNCTION = lambda x: (luminance_1976(x * 100) / 100
)
"""
Inverse transfer function from *ECI RGB v2* colourspace to linear.
ECI_RGB_V2_INVERSE_TRANSFER_FUNCTION : object
"""
ECI_RGB_V2_COLOURSPACE = RGB_Colourspace('ECI RGB v2', ECI_RGB_V2_PRIMARIES,
ECI_RGB_V2_WHITEPOINT,
ECI_RGB_V2_TO_XYZ_MATRIX,
XYZ_TO_ECI_RGB_V2_MATRIX,
ECI_RGB_V2_TRANSFER_FUNCTION,
ECI_RGB_V2_INVERSE_TRANSFER_FUNCTION)
"""
*ECI RGB v2* colourspace.
