colour.colorimetry.lightness_Fairchild2010#

colour.colorimetry.lightness_Fairchild2010(Y: FloatingOrArrayLike, epsilon: FloatingOrArrayLike = 1.836) FloatingOrNDArray[source]#

Compute Lightness \(L_{hdr}\) of given luminance \(Y\) using Fairchild and Wyble (2010) method according to Michaelis-Menten kinetics.

Parameters
  • Y (FloatingOrArrayLike) – Luminance \(Y\).

  • epsilon (FloatingOrArrayLike) – \(\epsilon\) exponent.

Returns

Lightness \(L_{hdr}\).

Return type

numpy.floating or numpy.ndarray

Notes

Domain

Scale - Reference

Scale - 1

Y

[0, 1]

[0, 1]

Range

Scale - Reference

Scale - 1

L_hdr

[0, 100]

[0, 1]

References

[FW10]

Examples

>>> lightness_Fairchild2010(12.19722535 / 100)  
31.9963902...