colour.colorimetry.whiteness_ASTME313

colour.colorimetry.whiteness_ASTME313(XYZ)[source]

Returns the whiteness index \(WI\) of given sample CIE XYZ tristimulus values using ASTM E313 method.

Parameters

XYZ (array_like) – CIE XYZ tristimulus values of sample.

Returns

Whiteness \(WI\).

Return type

numeric or ndarray

Notes

Domain

Scale - Reference

Scale - 1

XYZ

[0, 100]

[0, 1]

Range

Scale - Reference

Scale - 1

WI

[0, 100]

[0, 1]

References

[XRitePantone12]

Examples

>>> import numpy as np
>>> XYZ = np.array([95.00000000, 100.00000000, 105.00000000])
>>> whiteness_ASTME313(XYZ)  
55.7400000...