colour.munsell_value#

colour.munsell_value(Y: ArrayLike, method: Literal['ASTM D1535', 'Ladd 1955', 'McCamy 1987', 'Moon 1943', 'Munsell 1933', 'Priest 1920', 'Saunderson 1944'] | str = 'ASTM D1535') → NDArrayFloat[source]#

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

Parameters:

Y (ArrayLike) – luminance \(Y\).
method (Literal['ASTM D1535', 'Ladd 1955', 'McCamy 1987', 'Moon 1943', 'Munsell 1933', 'Priest 1920', 'Saunderson 1944'] | str) – Computation method.

Returns:

Munsell value \(V\).

Return type:

np.float or numpy.NDArrayFloat

Notes

Domain	Scale - Reference	Scale - 1
`Y`	[0, 100]	[0, 1]

Range	Scale - Reference	Scale - 1
`V`	[0, 10]	[0, 1]

References

[ASTMInternational89], [Wikipedia07a]

Examples

>>> munsell_value(12.23634268)  
4.0824437...
>>> munsell_value(12.23634268, method="Priest 1920")  
3.4980484...
>>> munsell_value(12.23634268, method="Munsell 1933")  
4.1627702...
>>> munsell_value(12.23634268, method="Moon 1943")  
4.0688120...
>>> munsell_value(12.23634268, method="Saunderson 1944")
... 
4.0444736...
>>> munsell_value(12.23634268, method="Ladd 1955")  
4.0511633...
>>> munsell_value(12.23634268, method="McCamy 1987")  
4.0814348...