colour.contrast.optical_MTF_Barten1999#

colour.contrast.optical_MTF_Barten1999(u: FloatingOrArrayLike, sigma: FloatingOrArrayLike = 0.01) FloatingOrNDArray[source]#

Return the optical modulation transfer function (MTF) \(M_{opt}\) of the eye using Barten (1999) method.

Parameters
  • u (FloatingOrArrayLike) – Spatial frequency \(u\), the cycles per degree.

  • sigma (FloatingOrArrayLike) – Standard deviation \(\sigma\) of the line-spread function resulting from the convolution of the different elements of the convolution process.

Returns

Optical modulation transfer function (MTF) \(M_{opt}\) of the eye.

Return type

numpy.floating or numpy.ndarray

References

[Bar99], [Bar03], [CKMW04], [InternationalTUnion15c],

Examples

>>> optical_MTF_Barten1999(4, 0.01)  
0.9689107...