colour.XYZ_to_K_ab_HunterLab1966

colour.XYZ_to_K_ab_HunterLab1966(XYZ)

Converts from whitepoint CIE XYZ tristimulus values to Hunter L,a,b \(K_{a}\) and \(K_{b}\) chromaticity coefficients.

Parameters:XYZ (array_like) – Whitepoint CIE XYZ tristimulus values. Returns:Hunter L,a,b \(K_{a}\) and \(K_{b}\) chromaticity coefficients. Return type:ndarray

Notes

• Input CIE XYZ tristimulus values are in domain [0, 100].

References

• [Hun08b]

Examples

>>> XYZ = np.array([109.850, 100.000, 35.585])
>>> XYZ_to_K_ab_HunterLab1966(XYZ)  
array([ 185.2378721...,   38.4219142...])