colour.Yrg_to_XYZ#

colour.Yrg_to_XYZ(Yrg: ArrayLike) → NDArrayFloat[source]#

Convert from Kirk (2019) Yrg colourspace to CIE XYZ tristimulus values.

Parameters:: Yrg (ArrayLike) – Kirk (2019) Yrg \(Yrg\) luminance, redness, and greenness.
Returns:: CIE XYZ tristimulus values values.
Return type:: numpy.ndarray

Notes

Domain	Scale - Reference	Scale - 1
`Yrg`	`Y` : [0, 1] `r` : [0, 1] `g` : [0, 1]	`Y` : [0, 1] `r` : [0, 1] `g` : [0, 1]

Domain

Scale - Reference

Scale - 1

Yrg

Y : [0, 1]

r : [0, 1]

g : [0, 1]

Y : [0, 1]

r : [0, 1]

g : [0, 1]

Range	Scale - Reference	Scale - 1
`XYZ`	[0, 100]	[0, 1]

References

[Kir19]

Examples

>>> import numpy as np
>>> Yrg = np.array([0.13137801, 0.49037645, 0.37777388])
>>> Yrg_to_XYZ(Yrg)  
array([ 0.2065468...,  0.1219717...,  0.0513819...])