colour.XYZ_to_UVW¶
-
colour.
XYZ_to_UVW
(XYZ, illuminant=array([ 0.3127, 0.329 ]))[source]¶ Converts from CIE XYZ tristimulus values to CIE 1964 U*V*W* 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 1964 U*V*W* colourspace array.
- Return type
ndarray
Warning
The input domain and output range of that definition are non standard!
Notes
Domain
Scale - Reference
Scale - 1
XYZ
[0, 1]
[0, 1]
illuminant
[0, 1]
[0, 1]
Range
Scale - Reference
Scale - 1
UVW
U
: [-100, 100]V
: [-100, 100]W
: [0, 100]U
: [-1, 1]V
: [-1, 1]W
: [0, 1]References
Examples
>>> import numpy as np >>> XYZ = np.array([0.20654008, 0.12197225, 0.05136952]) * 100 >>> XYZ_to_UVW(XYZ) array([ 94.5503572..., 11.5553652..., 40.5475740...])