colour.XYZ_to_IPT

colour.XYZ_to_IPT(XYZ)[source]

Converts from CIE XYZ tristimulus values to IPT colourspace.

Parameters:XYZ (array_like) – CIE XYZ tristimulus values.
Returns:IPT colourspace array.
Return type:ndarray

Notes

Domain Scale - Reference Scale - 1
XYZ [0, 1] [0, 1]
Range Scale - Reference Scale - 1
IPT

I : [0, 1]

P : [-1, 1]

T : [-1, 1]

I : [0, 1]

P : [-1, 1]

T : [-1, 1]

  • Input CIE XYZ tristimulus values needs to be adapted for CIE Standard Illuminant D Series D65.

References

[Fairchild2013y]

Examples

>>> XYZ = np.array([0.20654008, 0.12197225, 0.05136952])
>>> XYZ_to_IPT(XYZ)  # doctest: +ELLIPSIS
array([ 0.3842619...,  0.3848730...,  0.1888683...])