colour.XYZ_to_Oklab

colour.XYZ_to_Oklab(XYZ: ArrayLike) → numpy.ndarray

Convert from CIE XYZ tristimulus values to Oklab colourspace.

Parameters

XYZ (ArrayLike) – CIE XYZ tristimulus values.

Returns

Oklab colourspace array.

Return type

numpy.ndarray

Notes

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

Range	Scale - Reference	Scale - 1
Lab	L : [0, 1] a : [-1, 1] b : [-1, 1]	L : [0, 1] a : [-1, 1] b : [-1, 1]

• Input CIE XYZ tristimulus values must be adapted to CIE Standard Illuminant D Series D65.

References

[Ott20]

Examples

>>> XYZ = np.array([0.20654008, 0.12197225, 0.05136952])
>>> XYZ_to_Oklab(XYZ)  
array([ 0.5163401...,  0.154695 ...,  0.0628957...])

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