colour.XYZ_to_ProLab

colour.XYZ_to_ProLab(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]], 1]

Convert from CIE XYZ tristimulus values to ProLab 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:

ProLab colourspace array.

Return type:

numpy.ndarray

Notes

Domain	Scale - Reference	Scale - 1
XYZ	1	1

Range	Scale - Reference	Scale - 1
ProLab	1	1

References

[KSNN21]

Examples

>>> Lab = np.array([0.51634019, 0.15469500, 0.06289579])
>>> XYZ_to_ProLab(Lab)
array([  59.846628... ,  115.039635... ,   20.1251035...])