colour.munsell_value

colour.munsell_value(Y, method=u'ASTM D1535-08')

Returns the Munsell value \(V\) of given luminance \(Y\) using given method.

Parameters:

• Y (numeric or array_like) – luminance \(Y\).
• method (unicode, optional) – {‘ASTM D1535-08’, ‘Priest 1920’, ‘Munsell 1933’, ‘Moon 1943’, ‘Saunderson 1944’, ‘Ladd 1955’, ‘McCamy 1987’}, Computation method.

Returns:

Munsell value \(V\).

Return type:

numeric or ndarray

Notes

• Input Y is in domain [0, 100].
• Output V is in range [0, 10].

References

• [ASTMInternational89]
• [Wikn]

Examples

>>> munsell_value(10.08)  
3.7344764...
>>> munsell_value(10.08, method='Priest 1920')  
3.1749015...
>>> munsell_value(10.08, method='Munsell 1933')  
3.7918355...
>>> munsell_value(10.08, method='Moon 1943')  
3.7462971...
>>> munsell_value(10.08, method='Saunderson 1944')  
3.6865080...
>>> munsell_value(10.08, method='Ladd 1955')  
3.6952862...
>>> munsell_value(10.08, method='McCamy 1987')  
array(3.7347235...)