colour.UVW_to_XYZ

colour.UVW_to_XYZ(UVW, illuminant=array([ 0.3127, 0.329 ]))[source]

Converts CIE 1964 U*V*W* colourspace to CIE XYZ tristimulus values.

Parameters

  • UVW (array_like) – CIE 1964 U*V*W* colourspace array.

  • illuminant (array_like, optional) – Reference illuminant CIE xy chromaticity coordinates or CIE xyY colourspace array.

Returns

CIE XYZ tristimulus values.

Return type

ndarray

Warning

The input domain and output range of that definition are non standard!

Notes

Domain

Scale - Reference

Scale - 1

UVW

U : [-100, 100]

V : [-100, 100]

W : [0, 100]

U : [-1, 1]

V : [-1, 1]

W : [0, 1]

illuminant

[0, 1]

[0, 1]

Range

Scale - Reference

Scale - 1

XYZ

[0, 1]

[0, 1]

References

[Wik08b]

Examples

>>> import numpy as np
>>> UVW = np.array([94.55035725, 11.55536523, 40.54757405])
>>> UVW_to_XYZ(UVW)
array([ 20.654008,  12.197225,   5.136952])