colour.models.cie_uvw Module

CIE UVW Colourspace

Defines the CIE UVW colourspace transformations:

See also

CIE UVW Colourspace IPython Notebook

References

[1]http://en.wikipedia.org/wiki/CIE_1964_color_space (Last accessed 10 June 2014)
colour.models.cie_uvw.XYZ_to_UVW(XYZ, illuminant=(0.34567, 0.3585))[source]

Converts from CIE XYZ colourspace to CIE 1964 U*VW** colourspace.

Parameters:
  • XYZ (array_like, (3,)) – CIE XYZ colourspace matrix.
  • illuminant (array_like, optional) – Reference illuminant chromaticity coordinates.
Returns:

CIE 1964 U*VW** colourspace matrix.
Return type:

ndarray, (3,)

Notes

  • Input CIE XYZ colourspace matrix is in domain [0, 100].
  • Output CIE UVW colourspace matrix is in domain [0, 100].

Warning

The input / output domains of that definition are non standard!

Examples

>>> XYZ = np.array([11.80583421, 10.34, 5.15089229])
>>> XYZ_to_UVW(XYZ)  
array([ 24.2543371...,   7.2205484...,  37.4645000...])