colour.Hunter_Lab_to_XYZ¶
-
colour.
Hunter_Lab_to_XYZ
(Lab, XYZ_n=array([ 95.02, 100., 108.82]), K_ab=array([ 172.3, 67.2]))[source]¶ Converts from Hunter L,a,b colour scale to CIE XYZ tristimulus values.
Parameters: - Lab (array_like) – Hunter L,a,b colour scale array.
- XYZ_n (array_like, optional) – Reference illuminant tristimulus values.
- K_ab (array_like, optional) – Reference illuminant chromaticity coefficients, if
K_ab
is set to None it will be computed usingcolour.XYZ_to_K_ab_HunterLab1966()
.
Returns: CIE XYZ tristimulus values.
Return type: ndarray
Notes
Domain Scale - Reference Scale - 1 Lab
L
: [0, 100]a
: [-100, 100]b
: [-100, 100]L
: [0, 1]a
: [-1, 1]b
: [-1, 1]XYZ_n
[0, 100] [0, 1] Range Scale - Reference Scale - 1 XYZ
[0, 100] [0, 1] References
Examples
>>> Lab = np.array([34.92452577, 47.06189858, 14.38615107]) >>> D65 = HUNTERLAB_ILLUMINANTS[ ... 'CIE 1931 2 Degree Standard Observer']['D65'] >>> Hunter_Lab_to_XYZ(Lab, D65.XYZ_n, D65.K_ab) array([ 20.654008, 12.197225, 5.136952])