colour.volume.macadam_limits Module¶

Optimal Colour Stimuli - MacAdam Limits¶

Defines objects related to optimal colour stimuli computations.

colour.volume.macadam_limits.is_within_macadam_limits(xyY, illuminant, tolerance=None)[source]¶

Returns if given CIE xyY colourspace array is within MacAdam limits of given illuminant.

Parameters:	xyY (array_like) – CIE xyY colourspace array. illuminant (unicode) – Illuminant. tolerance (numeric, optional) – Tolerance allowed in the inside-triangle check.
Returns:	Is within MacAdam limits.
Return type:	bool

Notes

• Input CIE xyY colourspace array is in domain [0, 1].
• This definition requires scipy to be installed.

Examples

>>> is_within_macadam_limits(np.array([0.3205, 0.4131, 0.51]), 'A')
array(True, dtype=bool)
>>> a = np.array([[0.3205, 0.4131, 0.51],
...               [0.0005, 0.0031, 0.001]])
>>> is_within_macadam_limits(a, 'A')
array([ True, False], dtype=bool)