colour.colorimetry.whiteness_Taube1960¶

colour.colorimetry.whiteness_Taube1960(XYZ, XYZ_0)[source]¶

Returns the whiteness index \(WI\) of given sample CIE XYZ tristimulus values using Taube (1960) method.

Parameters:	XYZ (array_like) – CIE XYZ tristimulus values of sample. XYZ_0 (array_like) – CIE XYZ tristimulus values of reference white.
Returns:	Whiteness \(WI\).
Return type:	numeric or ndarray

Notes

Input CIE XYZ and CIE XYZ_0 tristimulus values are in domain [0, 100].
Whiteness \(WI\) values larger than 100 indicate a bluish white and values smaller than 100 indicate a yellowish white.

References

[XRP12]

Examples

>>> XYZ = np.array([95.00000000, 100.00000000, 105.00000000])
>>> XYZ_0 = np.array([94.80966767, 100.00000000, 107.30513595])
>>> whiteness_Taube1960(XYZ, XYZ_0)  
91.4071738...