colour.yellowness¶
-
colour.
yellowness
(XYZ, method='ASTM E313')[source]¶ Returns the yellowness \(W\) using given method.
Parameters: - XYZ (array_like) – CIE XYZ tristimulus values of sample.
- method (unicode, optional) – {‘ASTM E313’, ‘ASTM D1925’}, Computation method.
Returns: yellowness \(Y\).
Return type: numeric or ndarray
Notes
Domain Scale - Reference Scale - 1 XYZ
[0, 100] [0, 1] Range Scale - Reference Scale - 1 YI
[0, 100] [0, 1] References
Examples
>>> import numpy as np >>> XYZ = np.array([95.00000000, 100.00000000, 105.00000000]) >>> yellowness(XYZ) # doctest: +ELLIPSIS 11.0650000... >>> method = 'ASTM D1925' >>> yellowness(XYZ, method=method) # doctest: +ELLIPSIS 10.2999999...