colour.characterisation.augmented_matrix_Cheung2004¶
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colour.characterisation.
augmented_matrix_Cheung2004
(RGB, terms=3)[source]¶ Performs polynomial expansion of given RGB colourspace array using Cheung et al. (2004) method.
Parameters: - RGB (array_like) – RGB colourspace array to expand.
- terms (int, optional) – Number of terms of the expanded polynomial, must be one of [3, 5, 7, 8, 10, 11, 14, 16, 17, 19, 20, 22].
Returns: Expanded RGB colourspace array.
Return type: ndarray
Notes
References
Examples
>>> RGB = np.array([0.17224810, 0.09170660, 0.06416938]) >>> augmented_matrix_Cheung2004(RGB, terms=5) # doctest: +ELLIPSIS array([ 0.1722481..., 0.0917066..., 0.0641693..., 0.0010136..., 1...])