colour.contrast.optical_MTF_Barten1999¶
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colour.contrast.
optical_MTF_Barten1999
(u, sigma=0.01)[source]¶ Returns the optical modulation transfer function (MTF) \(M_{opt}\) of the eye using Barten (1999) method.
Parameters: - u (numeric or array_like) – Spatial frequency \(u\), the cycles per degree.
- sigma (numeric or array_like, optional) – 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: numeric or array_like
References
[Bar99], [Bar03], [CKM+04], [InternationalTUnion15c],
Examples
>>> optical_MTF_Barten1999(4, 0.01) # doctest: +ELLIPSIS 0.9689107...