colour.XYZ_to_IPT

colour.XYZ_to_IPT(XYZ: ArrayLike) → NDArrayFloat

Convert from CIE XYZ tristimulus values to IPT colourspace.

Parameters:

XYZ (ArrayLike) – CIE XYZ tristimulus values.

Returns:

IPT colourspace array.

Return type:

numpy.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 must be adapted to CIE Standard Illuminant D Series D65.

References

[Fai13g]

Examples

>>> XYZ = np.array([0.20654008, 0.12197225, 0.05136952])
>>> XYZ_to_IPT(XYZ)  
array([ 0.3842619...,  0.3848730...,  0.1888683...])