colour.Lab_to_XYZ

colour.Lab_to_XYZ(Lab, illuminant=array([ 0.3127, 0.329 ]))

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

Parameters:

• Lab (array_like) – CIE L*a*b* colourspace array.
• illuminant (array_like, optional) – Reference illuminant xy chromaticity coordinates or CIE xyY colourspace array.

Returns:

CIE XYZ tristimulus values.

Return type:

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

>>> Lab = np.array([41.52787529, 52.63858304, 26.92317922])
>>> Lab_to_XYZ(Lab)  # doctest: +ELLIPSIS
array([ 0.2065400...,  0.1219722...,  0.0513695...])