colour.temperature.xy_to_CCT_CIE_D¶
- colour.temperature.xy_to_CCT_CIE_D(xy, optimisation_kwargs=None, **kwargs)[source]¶
Returns the correlated colour temperature \(T_{cp}\) of a CIE Illuminant D Series from its CIE xy chromaticity coordinates.
- Parameters
xy (array_like) – CIE xy chromaticity coordinates.
optimisation_kwargs (dict_like, optional) – Parameters for
scipy.optimize.minimize()
definition.**kwargs (dict, optional) – Keywords arguments for deprecation management.
- Returns
Correlated colour temperature \(T_{cp}\).
- Return type
ndarray
Warning
The CIE Illuminant D Series method 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
[]
Examples
>>> xy_to_CCT_CIE_D(np.array([0.31270775, 0.32911283])) ... 6504.3895840...