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]

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...])