colour.is_within_visible_spectrum¶

colour.is_within_visible_spectrum(XYZ, cmfs=XYZ_ColourMatchingFunctions(name='CIE 1931 2 Degree Standard Observer', ...), illuminant=SpectralDistribution(name='1 Constant', ...), tolerance=None, **kwargs)[source]¶

Returns if given CIE XYZ tristimulus values are within visible spectrum volume / given colour matching functions volume.

Parameters

XYZ (array_like) – CIE XYZ tristimulus values.
cmfs (XYZ_ColourMatchingFunctions, optional) – Standard observer colour matching functions.
illuminant (SpectralDistribution, optional) – Illuminant spectral distribution.
tolerance (numeric, optional) – Tolerance allowed in the inside-triangle check.

Other Parameters

**kwargs (dict, optional) – {colour.multi_sds_to_XYZ()}, Please refer to the documentation of the previously listed definition.

Returns

Is within visible spectrum.

Return type

bool

Notes

Domain	Scale - Reference	Scale - 1
`XYZ`	[0, 1]	[0, 1]

Examples

>>> import numpy as np
>>> is_within_visible_spectrum(np.array([0.3205, 0.4131, 0.51]))
array(True, dtype=bool)
>>> a = np.array([[0.3205, 0.4131, 0.51],
...               [-0.0005, 0.0031, 0.001]])
>>> is_within_visible_spectrum(a)
array([ True, False], dtype=bool)