colour.colorimetry.whiteness_ASTME313

colour.colorimetry.whiteness_ASTME313(XYZ: Annotated[_Buffer | _SupportsArray[dtype[Any]] | _NestedSequence[_SupportsArray[dtype[Any]]] | complex | bytes | str | _NestedSequence[complex | bytes | str], 100]) → Annotated[ndarray[tuple[Any, ...], dtype[float16 | float32 | float64]], 100]

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

Parameters:

XYZ (Annotated[_Buffer | _SupportsArray[dtype[Any]] | _NestedSequence[_SupportsArray[dtype[Any]]] | complex | bytes | str | _NestedSequence[complex | bytes | str], 100]) – CIE XYZ tristimulus values of the sample.

Returns:

Whiteness index \(WI\).

Return type:

numpy.ndarray

Notes

Domain	Scale - Reference	Scale - 1
XYZ	100	1

Range	Scale - Reference	Scale - 1
WI	100	1

References

[XRitePantone12]

Examples

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