colour.Lab_to_XYZ

colour.Lab_to_XYZ(Lab: ArrayLike, illuminant: ArrayLike = CCS_ILLUMINANTS['CIE 1931 2 Degree Standard Observer']['D65']) → numpy.ndarray

Convert from CIE L*a*b* colourspace to CIE XYZ tristimulus values.

Parameters

• Lab (ArrayLike) – CIE L*a*b* colourspace array.

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

Returns

CIE XYZ tristimulus values.

Return type

numpy.ndarray

Notes

Domain	Scale - Reference	Scale - 1
Lab	L : [0, 100] a : [-100, 100] b : [-100, 100]	L : [0, 1] a : [-1, 1] b : [-1, 1]
illuminant	[0, 1]	[0, 1]

Range	Scale - Reference	Scale - 1
XYZ	[0, 1]	[0, 1]

References

[CIET14804f]

Examples

>>> import numpy as np
>>> Lab = np.array([41.52787529, 52.63858304, 26.92317922])
>>> Lab_to_XYZ(Lab)  
array([ 0.2065400...,  0.1219722...,  0.0513695...])

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colour.XYZ_to_Lab

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colour.Lab_to_LCHab