colour.colorimetry.lightness_Fairchild2010

colour.colorimetry.lightness_Fairchild2010(Y, epsilon=1.836)[source]

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

Parameters

  • Y (array_like) – luminance \(Y\).

  • epsilon (numeric or array_like, optional) – \(\epsilon\) exponent.

Returns

Lightness \(L_{hdr}\).

Return type

array_like

Warning

The input domain of that definition is non standard!

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...