colour.XYZ_to_Hunter_Lab#

Convert from CIE XYZ tristimulus values to Hunter L,a,b colour scale.

Parameters:

XYZ (Annotated[_Buffer | _SupportsArray[dtype[Any]] | _NestedSequence[_SupportsArray[dtype[Any]]] | complex | bytes | str | _NestedSequence[complex | bytes | str], 100]) – CIE XYZ tristimulus values.
XYZ_n (TypeAliasForwardRef('ArrayLike') | None) – Reference illuminant tristimulus values.
K_ab (TypeAliasForwardRef('ArrayLike') | None) – Reference illuminant chromaticity coefficients. If K_ab is set to None, it will be computed using colour.XYZ_to_K_ab_HunterLab1966().

Returns:

Hunter L,a,b colour scale array.

Return type:

numpy.ndarray

Notes

Domain	Scale - Reference	Scale - 1
`XYZ`	100	1
`XYZ_n`	100	1

Range	Scale - Reference	Scale - 1
`Lab`	100	1

References

[HunterLab08a]

Examples

>>> XYZ = np.array([0.20654008, 0.12197225, 0.05136952]) * 100
>>> D65 = TVS_ILLUMINANTS_HUNTERLAB["CIE 1931 2 Degree Standard Observer"]["D65"]
>>> XYZ_to_Hunter_Lab(XYZ, D65.XYZ_n, D65.K_ab)
array([ 34.9245257...,  47.0618985...,  14.3861510...])

colour.XYZ_to_Hunter_Lab#

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