colour.lightness¶
- colour.lightness(Y: FloatingOrArrayLike, method: Union[Literal['Abebe 2017', 'CIE 1976', 'Glasser 1958', 'Fairchild 2010', 'Fairchild 2011', 'Wyszecki 1963'], str] = 'CIE 1976', **kwargs: Any) FloatingOrNDArray[source]¶
Return the Lightness \(L\) of given luminance \(Y\) using given method.
- Parameters
Y (FloatingOrArrayLike) – Luminance \(Y\).
method (Union[Literal['Abebe 2017', 'CIE 1976', 'Glasser 1958', 'Fairchild 2010', 'Fairchild 2011', 'Wyszecki 1963'], str]) – Computation method.
Y_n – {
colour.colorimetry.lightness_Abebe2017(),colour.colorimetry.lightness_CIE1976()}, White reference luminance \(Y_n\).epsilon – {
colour.colorimetry.lightness_Fairchild2010(),colour.colorimetry.lightness_Fairchild2011()}, \(\epsilon\) exponent.kwargs (Any) –
- Returns
Lightness \(L\).
- Return type
Notes
Domain
Scale - Reference
Scale - 1
Y[0, 100]
[0, 1]
Range
Scale - Reference
Scale - 1
L[0, 100]
[0, 1]
References
[APLR17], [CIET14804f], [FW10], [FC11], [GMRS58], [Wikipedia07d], [Wys63], [WS00c]
Examples
>>> lightness(12.19722535) 41.5278758... >>> lightness(12.19722535, Y_n=100) 41.5278758... >>> lightness(12.19722535, Y_n=95) 42.5199307... >>> lightness(12.19722535, method='Glasser 1958') 39.8351264... >>> lightness(12.19722535, method='Wyszecki 1963') 40.5475745... >>> lightness(12.19722535, epsilon=0.710, method='Fairchild 2011') ... 29.8295108... >>> lightness(12.19722535, epsilon=0.710, method='Fairchild 2011') ... 29.8295108... >>> lightness(12.19722535, method='Abebe 2017') ... 48.6955571...