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 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])