colour.munsell_value

colour.munsell_value(Y: Domain100, method: Literal['ASTM D1535', 'Ladd 1955', 'McCamy 1987', 'Moon 1943', 'Munsell 1933', 'Priest 1920', 'Saunderson 1944'] | str = 'ASTM D1535') → Range10

Compute the Munsell value \(V\) from the specified luminance \(Y\) using the specified computational method.

Parameters:

• Y (Domain100) – 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	100	1

Range	Scale - Reference	Scale - 1
V	10	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...