colour.XYZ_to_xyY

colour.XYZ_to_xyY(XYZ, illuminant=array([0.3127, 0.329]))[source]

Converts from CIE XYZ tristimulus values to CIE xyY colourspace and reference illuminant.

Parameters
  • XYZ (array_like) – CIE XYZ tristimulus values.

  • illuminant (array_like, optional) – Reference illuminant chromaticity coordinates.

Returns

CIE xyY colourspace array.

Return type

ndarray

Notes

Domain

Scale - Reference

Scale - 1

XYZ

[0, 1]

[0, 1]

Range

Scale - Reference

Scale - 1

xyY

[0, 1]

[0, 1]

References

[Lin03b], [Wikipedia05a]

Examples

>>> XYZ = np.array([0.20654008, 0.12197225, 0.05136952])
>>> XYZ_to_xyY(XYZ)  
array([ 0.5436955...,  0.3210794...,  0.1219722...])