colour.xy_to_CCT

colour.xy_to_CCT(xy: ArrayLike, method: Literal['CIE Illuminant D Series', 'Kang 2002', 'Hernandez 1999', 'McCamy 1992'] | str = 'CIE Illuminant D Series') → NDArrayFloat

Compute the correlated colour temperature \(T_{cp}\) from the specified CIE xy chromaticity coordinates using the specified method.

Parameters:

• xy (ArrayLike) – CIE xy chromaticity coordinates.

• method (Literal['CIE Illuminant D Series', 'Kang 2002', 'Hernandez 1999', 'McCamy 1992'] | str) – Computation method.

• optimisation_kwargs – {colour.temperature.xy_to_CCT_CIE_D(), colour.temperature.xy_to_CCT_Kang2002()}, Parameters for scipy.optimize.minimize() definition.

Returns:

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

Return type:

numpy.ndarray

References

[HernandezAndresLR99], [KMH+02], [Wikipedia01a], [Wikipedia01b], [WS00k]

Examples

>>> import numpy as np
>>> xy_to_CCT(np.array([0.31270, 0.32900]))
6508.1175148...
>>> xy_to_CCT(np.array([0.31270, 0.32900]), "Hernandez 1999")
...
6500.7420431...