colour.matrix_cvd_Machado2009

colour.matrix_cvd_Machado2009(deficiency: Literal['Deuteranomaly', 'Protanomaly', 'Tritanomaly'] | str, severity: float) → NDArrayFloat

Compute the Machado et al. (2009) colour vision deficiency matrix for the specified deficiency and severity using pre-computed matrices.

Parameters:

• deficiency (Literal['Deuteranomaly', 'Protanomaly', 'Tritanomaly'] | str) –

  Colour vision deficiency type:

  • Protanomaly: Defective long-wavelength cones (L-cones) with reduced sensitivity. Complete absence of L-cones is Protanopia or red-dichromacy.

  • Deuteranomaly: Defective medium-wavelength cones (M-cones) with peak sensitivity shifted towards red-sensitive cones. Complete absence of M-cones is Deuteranopia.

  • Tritanomaly: Defective short-wavelength cones (S-cones), representing an alleviated form of blue-yellow colour blindness. Complete absence of S-cones is Tritanopia.

• severity (float) – Severity of the colour vision deficiency in domain [0, 1].

Returns:

Colour vision deficiency matrix.

Return type:

numpy.ndarray

References

[Colblindorb], [Colblindora], [Colblindorc], [MOF09]

Examples

>>> matrix_cvd_Machado2009("Protanomaly", 0.15)
array([[ 0.7869875...,  0.2694875..., -0.0564735...],
       [ 0.0431695...,  0.933774 ...,  0.023058 ...],
       [-0.004238 ..., -0.0024515...,  1.0066895...]])