colour.XYZ_to_Hunter_Lab#
- colour.XYZ_to_Hunter_Lab(XYZ: ArrayLike, XYZ_n: ArrayLike = TVS_ILLUMINANTS_HUNTERLAB['CIE 1931 2 Degree Standard Observer']['D65'].XYZ_n, K_ab: ArrayLike = TVS_ILLUMINANTS_HUNTERLAB['CIE 1931 2 Degree Standard Observer']['D65'].K_ab) NDArrayFloat [source]#
Convert from CIE XYZ tristimulus values to Hunter L,a,b colour scale.
- Parameters:
XYZ (ArrayLike) – CIE XYZ tristimulus values.
XYZ_n (ArrayLike) – Reference illuminant tristimulus values.
K_ab (ArrayLike) – Reference illuminant chromaticity coefficients, if
K_ab
is set to None it will be computed usingcolour.XYZ_to_K_ab_HunterLab1966()
.
- Returns:
Hunter L,a,b colour scale array.
- Return type:
Notes
Domain
Scale - Reference
Scale - 1
XYZ
[0, 100]
[0, 1]
XYZ_n
[0, 100]
[0, 1]
Range
Scale - Reference
Scale - 1
Lab
L
: [0, 100]a
: [-100, 100]b
: [-100, 100]L
: [0, 1]a
: [-1, 1]b
: [-1, 1]References
Examples
>>> XYZ = np.array([0.20654008, 0.12197225, 0.05136952]) * 100 >>> D65 = TVS_ILLUMINANTS_HUNTERLAB["CIE 1931 2 Degree Standard Observer"]["D65"] >>> XYZ_to_Hunter_Lab(XYZ, D65.XYZ_n, D65.K_ab) array([ 34.9245257..., 47.0618985..., 14.3861510...])