colour.temperature.CCT_to_uv_Ohno2013

colour.temperature.CCT_to_uv_Ohno2013(CCT_D_uv, cmfs=XYZ_ColourMatchingFunctions(name='CIE 1931 2 Degree Standard Observer', ...))[source]

Returns the CIE UCS colourspace uv chromaticity coordinates from given correlated colour temperature \(T_{cp}\), \(\Delta_{uv}\) and colour matching functions using Ohno (2013) method.

Parameters:
  • CCT_D_uv (ndarray) – Correlated colour temperature \(T_{cp}\), \(\Delta_{uv}\).
  • cmfs (XYZ_ColourMatchingFunctions, optional) – Standard observer colour matching functions.
Returns:

CIE UCS colourspace uv chromaticity coordinates.

Return type:

ndarray

References

[Ohno2014a]

Examples

>>> from colour import DEFAULT_SPECTRAL_SHAPE, STANDARD_OBSERVERS_CMFS
>>> cmfs = (
...     STANDARD_OBSERVERS_CMFS['CIE 1931 2 Degree Standard Observer'].
...     copy().align(DEFAULT_SPECTRAL_SHAPE)
... )
>>> CCT_D_uv = np.array([6507.4342201047066, 0.003223690901513])
>>> CCT_to_uv_Ohno2013(CCT_D_uv, cmfs)  # doctest: +ELLIPSIS
array([ 0.1977999...,  0.3122004...])