colour.Lab_to_DIN99#

colour.Lab_to_DIN99(Lab: Domain100, k_E: float = 1, k_CH: float = 1, method: Literal['ASTMD2244-07', 'DIN99', 'DIN99b', 'DIN99c', 'DIN99d'] | str = 'DIN99') → Range100[source]#

Convert from CIE L*a*b* colourspace to DIN99 colourspace or one of the DIN99b, DIN99c, DIN99d refined formulas according to Cui et al. (2002).

Parameters:

Lab (Domain100) – CIE L*a*b* colourspace array.
k_E (float) – Parametric factor \(K_E\) used to compensate for texture and other specimen presentation effects.
k_CH (float) – Parametric factor \(K_{CH}\) used to compensate for texture and other specimen presentation effects.
method (Literal['ASTMD2244-07', 'DIN99', 'DIN99b', 'DIN99c', 'DIN99d'] | str) – Computation method.

Returns:

DIN99 colourspace array.

Return type:

numpy.ndarray

Notes

Domain	Scale - Reference	Scale - 1
`Lab`	100	1

Range	Scale - Reference	Scale - 1
`Lab_99`	100	1

References

[ASTMInternational07], [CLR+02]

Examples

>>> import numpy as np
>>> Lab = np.array([41.52787529, 52.63858304, 26.92317922])
>>> Lab_to_DIN99(Lab)
array([ 53.2282198...,  28.4163465...,   3.8983955...])

colour.Lab_to_DIN99#

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