colour.XYZ_to_xy#

colour.XYZ_to_xy(XYZ: ArrayLike) → NDArrayFloat[source]#

Return the CIE xy chromaticity coordinates from given CIE XYZ tristimulus values.

Parameters:

XYZ (ArrayLike) – CIE XYZ tristimulus values.

Returns:

CIE xy chromaticity coordinates.

Return type:

numpy.ndarray

Notes

Domain

Scale - Reference

Scale - 1

XYZ

[0, 1]

[0, 1]

References

[CIET14804f], [Wikipedia05d]

Examples

>>> XYZ = np.array([0.20654008, 0.12197225, 0.05136952])
>>> XYZ_to_xy(XYZ)  
array([ 0.5436955...,  0.3210794...])