colour.XYZ_to_Lab¶
-
colour.
XYZ_to_Lab
(XYZ, illuminant=array([ 0.3127, 0.329 ]))[source]¶ Converts from CIE XYZ tristimulus values to CIE L*a*b* colourspace.
- Parameters
XYZ (array_like) – CIE XYZ tristimulus values.
illuminant (array_like, optional) – Reference illuminant CIE xy chromaticity coordinates or CIE xyY colourspace array.
- Returns
CIE L*a*b* colourspace array.
- Return type
ndarray
Notes
Domain
Scale - Reference
Scale - 1
XYZ
[0, 1]
[0, 1]
illuminant
[0, 1]
[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
>>> import numpy as np >>> XYZ = np.array([0.20654008, 0.12197225, 0.05136952]) >>> XYZ_to_Lab(XYZ) array([ 41.5278752..., 52.6385830..., 26.9231792...])