colour.luminance¶
-
colour.
luminance
(LV, method='CIE 1976', **kwargs)[source]¶ Returns the luminance \(Y\) of given Lightness \(L^*\) or given Munsell value \(V\).
- Parameters
LV (numeric or array_like) – Lightness \(L^*\) or Munsell value \(V\).
method (unicode, optional) – {‘CIE 1976’, ‘Newhall 1943’, ‘ASTM D1535’, ‘Fairchild 2010’, ‘Fairchild 2011’}, Computation method.
- Other Parameters
Y_n (numeric or array_like, optional) – {
colour.colorimetry.luminance_CIE1976()
}, White reference luminance \(Y_n\).epsilon (numeric or array_like, optional) – {
colour.colorimetry.lightness_Fairchild2010()
,colour.colorimetry.lightness_Fairchild2011()
}, \(\epsilon\) exponent.
- Returns
luminance \(Y\).
- Return type
numeric or array_like
Notes
Domain
Scale - Reference
Scale - 1
LV
[0, 100]
[0, 1]
Range
Scale - Reference
Scale - 1
Y
[0, 100]
[0, 1]
References
[ASTMInternational08], [CIET14804f], [FW10], [FC11], [NNJ43], [Wik01c], [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...