colour.XYZ_to_Oklab

colour.XYZ_to_Oklab(XYZ)[source]

Converts from CIE XYZ tristimulus values to Oklab colourspace.

Parameters

XYZ (array_like) – CIE XYZ tristimulus values.

Returns

Oklab colourspace array.

Return type

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...])