colour.characterisation.colour_correction_Cheung2004¶
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colour.characterisation.
colour_correction_Cheung2004
(RGB, M_T, M_R, terms=3)[source]¶ Performs colour correction of given RGB colourspace array using the colour correction matrix from given \(M_T\) colour array to \(M_R\) colour array using Cheung et al. (2004) method.
- Parameters
RGB (array_like, (n, 3)) – RGB colourspace array to colour correct.
M_T (array_like, (n, 3)) – Test array \(M_T\) to fit onto array \(M_R\).
M_R (array_like, (n, 3)) – Reference array the array \(M_T\) will be colour fitted against.
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
Colour corrected RGB colourspace array.
- Return type
ndarray
References
Examples
>>> RGB = np.array([0.17224810, 0.09170660, 0.06416938]) >>> prng = np.random.RandomState(2) >>> M_T = prng.random_sample((24, 3)) >>> M_R = M_T + (prng.random_sample((24, 3)) - 0.5) * 0.5 >>> colour_correction_Cheung2004(RGB, M_T, M_R) array([ 0.1793456..., 0.1003392..., 0.0617218...])