colour.characterisation.polynomial_expansion_Vandermonde¶
-
colour.characterisation.
polynomial_expansion_Vandermonde
(a, degree=1)[source]¶ Performs polynomial expansion of given \(a\) array using Vandermonde method.
- Parameters
a (array_like) – \(a\) array to expand.
degree (int, optional) – Expanded polynomial degree.
- Returns
Expanded \(a\) array.
- Return type
ndarray
References
Examples
>>> RGB = np.array([0.17224810, 0.09170660, 0.06416938]) >>> polynomial_expansion_Vandermonde(RGB) array([ 0.1722481 , 0.0917066 , 0.06416938, 1. ])