colour.yellowness#
- colour.yellowness(XYZ: ArrayLike, method: Literal['ASTM D1925', 'ASTM E313', 'ASTM E313 Alternative'] | str = 'ASTM E313', **kwargs: Any) NDArrayFloat [source]#
Return the yellowness \(W\) using given method.
- Parameters:
XYZ (ArrayLike) – CIE XYZ tristimulus values of the sample.
method (Literal['ASTM D1925', 'ASTM E313', 'ASTM E313 Alternative'] | str) – Computation method.
C_XZ – {
colour.colorimetry.yellowness_ASTME313()
}, Coefficients \(C_X\) and \(C_Z\) for the CIE 1931 2 Degree Standard Observer and CIE 1964 10 Degree Standard Observer and CIE Illuminant C and CIE Standard Illuminant D65.kwargs (Any)
- Returns:
Yellowness \(Y\).
- Return type:
np.float
ornumpy.ndarray
Notes
Domain
Scale - Reference
Scale - 1
XYZ
[0, 100]
[0, 1]
Range
Scale - Reference
Scale - 1
YI
[0, 100]
[0, 1]
References
[ASTMInternational15b], [XRitePantone12]
Examples
>>> XYZ = np.array([95.00000000, 100.00000000, 105.00000000]) >>> yellowness(XYZ) 4.3400000... >>> yellowness(XYZ, method="ASTM E313 Alternative") 11.0650000... >>> yellowness(XYZ, method="ASTM D1925") 10.2999999...