colour.XYZ_to_Yrg#
- colour.XYZ_to_Yrg(XYZ: ArrayLike) NDArrayFloat [source]#
Convert from CIE XYZ tristimulus values to Kirk (2019) Yrg colourspace.
- Parameters:
XYZ (ArrayLike) – CIE XYZ tristimulus values values.
- Returns:
Kirk (2019) Yrg \(Yrg\) luminance, redness, and greenness.
- Return type:
Notes
Domain
Scale - Reference
Scale - 1
XYZ
[0, 100]
[0, 1]
Range
Scale - Reference
Scale - 1
Yrg
Y
: [0, 1]r
: [0, 1]g
: [0, 1]Y
: [0, 1]r
: [0, 1]g
: [0, 1]References
[Kir19]
Examples
>>> import numpy as np >>> XYZ = np.array([0.20654008, 0.12197225, 0.05136952]) >>> XYZ_to_Yrg(XYZ) array([ 0.1313780..., 0.4903764..., 0.3777738...])