colour.luminance¶
- colour.luminance(LV: 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 luminance \(Y\) of given Lightness \(L^*\) or given Munsell value \(V\).
- Parameters
LV (FloatingOrArrayLike) – Lightness \(L^*\) or Munsell value \(V\).
method (Union[Literal['Abebe 2017', 'CIE 1976', 'Glasser 1958', 'Fairchild 2010', 'Fairchild 2011', 'Wyszecki 1963'], str]) – Computation method.
Y_n – {
colour.colorimetry.luminance_Abebe2017(),colour.colorimetry.luminance_CIE1976()}, White reference luminance \(Y_n\).epsilon – {
colour.colorimetry.lightness_Fairchild2010(),colour.colorimetry.lightness_Fairchild2011()}, \(\epsilon\) exponent.kwargs (Any) –
- Returns
Luminance \(Y\).
- Return type
Notes
Domain
Scale - Reference
Scale - 1
LV[0, 100]
[0, 1]
Range
Scale - Reference
Scale - 1
Y[0, 100]
[0, 1]
References
[APLR17], [ASTMInternational08], [CIET14804f], [FW10], [FC11], [NNJ43], [Wikipedia01c], [WS00c]
Examples
>>> luminance(41.527875844653451) 12.1972253... >>> luminance(41.527875844653451, Y_n=100) 12.1972253... >>> luminance(42.51993072812094, Y_n=95) 12.1972253... >>> luminance(4.08244375 * 10, method='Newhall 1943') ... 12.5500788... >>> luminance(4.08244375 * 10, method='ASTM D1535') ... 12.2363426... >>> luminance(29.829510892279330, epsilon=0.710, method='Fairchild 2011') ... 12.1972253...