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 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) # doctest: +ELLIPSIS array([ 94.5503572..., 11.5553652..., 40.5475740...])