colour.XYZ_to_Oklab#

colour.XYZ_to_Oklab(XYZ: ArrayLike) NDArrayFloat[source]#

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...])