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

[Fai13d]

Examples

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