colour.temperature.xy_to_CCT_Kang2002

colour.temperature.xy_to_CCT_Kang2002(xy, optimisation_kwargs=None, **kwargs)[source]

Returns the correlated colour temperature \(T_{cp}\) from given CIE xy chromaticity coordinates using Kang et al. (2002) method.

Parameters
  • xy (array_like) – CIE xy chromaticity coordinates.

  • optimisation_kwargs (dict_like, optional) – Parameters for scipy.optimize.minimize() definition.

Other Parameters

**kwargs (dict, optional) – Keywords arguments for deprecation management.

Returns

Correlated colour temperature \(T_{cp}\).

Return type

ndarray

Warning

Kang et al. (2002) does not give an analytical inverse transformation to compute the correlated colour temperature \(T_{cp}\) from given CIE xy chromaticity coordinates, the current implementation relies on optimization using scipy.optimize.minimize() definition and thus has reduced precision and poor performance.

References

[KMH+02]

Examples

>>> xy_to_CCT_Kang2002(np.array([0.31342600, 0.32359597]))
... 
6504.3893128...