colour.primaries_whitepoint

colour.primaries_whitepoint(npm)[source]

Returns the primaries and whitepoint \(xy\) chromaticity coordinates using given normalised primary matrix.

Parameters:npm (array_like, (3, 3)) – Normalised primary matrix.
Returns:Primaries and whitepoint \(xy\) chromaticity coordinates.
Return type:tuple

References

[Trieu2015a]

Examples

>>> npm = np.array([[9.52552396e-01, 0.00000000e+00, 9.36786317e-05],
...                 [3.43966450e-01, 7.28166097e-01, -7.21325464e-02],
...                 [0.00000000e+00, 0.00000000e+00, 1.00882518e+00]])
>>> p, w = primaries_whitepoint(npm)
>>> p  # doctest: +ELLIPSIS
array([[  7.3470000...e-01,   2.6530000...e-01],
       [  0.0000000...e+00,   1.0000000...e+00],
       [  1.0000000...e-04,  -7.7000000...e-02]])
>>> w # doctest: +ELLIPSIS
array([ 0.32168,  0.33767])