colour.XYZ_to_Luv

colour.XYZ_to_Luv(XYZ: Annotated[_Buffer | _SupportsArray[dtype[Any]] | _NestedSequence[_SupportsArray[dtype[Any]]] | complex | bytes | str | _NestedSequence[complex | bytes | str], 1], illuminant: ArrayLike = CCS_ILLUMINANTS['CIE 1931 2 Degree Standard Observer']['D65']) → Annotated[ndarray[tuple[Any, ...], dtype[float16 | float32 | float64]], 100]

Convert from CIE XYZ tristimulus values to CIE L*u*v* colourspace.

Parameters:

• XYZ (Annotated[_Buffer | _SupportsArray[dtype[Any]] | _NestedSequence[_SupportsArray[dtype[Any]]] | complex | bytes | str | _NestedSequence[complex | bytes | str], 1]) – CIE XYZ tristimulus values.

• illuminant (ArrayLike) – Reference illuminant CIE xy chromaticity coordinates or CIE xyY colourspace array.

Returns:

CIE L*u*v* colourspace array.

Return type:

numpy.ndarray

Notes

Domain	Scale - Reference	Scale - 1
XYZ	1	1
illuminant	1	1

Range	Scale - Reference	Scale - 1
Luv	100	1

References

[CIET14804h], [Wikipedia07e]

Examples

>>> import numpy as np
>>> XYZ = np.array([0.20654008, 0.12197225, 0.05136952])
>>> XYZ_to_Luv(XYZ)
array([41.5278752..., 96.8362605..., 17.7521014...])