colour.uv_to_Luv¶
- colour.uv_to_Luv(uv: ArrayLike, illuminant: ArrayLike = CCS_ILLUMINANTS['CIE 1931 2 Degree Standard Observer']['D65'], Y: float = 1) numpy.ndarray [source]¶
Return the CIE L*u*v* colourspace array from given \(uv^p\) chromaticity coordinates by extending the array last dimension with given \(L\) Lightness.
- Parameters
uv (ArrayLike) – \(uv^p\) chromaticity coordinates.
illuminant (ArrayLike) – Reference illuminant CIE xy chromaticity coordinates or CIE xyY colourspace array.
Y (float) – Optional \(Y\) luminance value used to construct the intermediate CIE XYZ colourspace array, the default \(Y\) luminance value is 1.
- Returns
CIE L*u*v* colourspace array.
- Return type
Notes
Range
Scale - Reference
Scale - 1
Luv
L
: [0, 100]u
: [-100, 100]v
: [-100, 100]L
: [0, 1]u
: [-1, 1]v
: [-1, 1]illuminant
[0, 1]
[0, 1]
References
Examples
>>> import numpy as np >>> uv = np.array([0.37720213, 0.50120264]) >>> uv_to_Luv(uv) array([ 100. , 233.1837603..., 42.7474385...])