colour.contrast.maximum_angular_size_Barten1999¶
- colour.contrast.maximum_angular_size_Barten1999(u: FloatingOrArrayLike, X_0: FloatingOrArrayLike = 60, X_max: FloatingOrArrayLike = 12, N_max: FloatingOrArrayLike = 15) FloatingOrNDArray [source]¶
Return the maximum angular size \(X\) of the object considered using Barten (1999) method.
- Parameters
u (FloatingOrArrayLike) – Spatial frequency \(u\), the cycles per degree.
X_0 (FloatingOrArrayLike) – Angular size \(X_0\) in degrees of the object in the x direction.
X_max (FloatingOrArrayLike) – Maximum angular size \(X_{max}\) in degrees of the integration area in the x direction.
N_max (FloatingOrArrayLike) – Maximum number of cycles \(N_{max}\) over which the eye can integrate the information.
- Returns
Maximum angular size \(X\) of the object considered.
- Return type
References
[Bar99], [Bar03], [CKMW04], [InternationalTUnion15c],
Examples
>>> maximum_angular_size_Barten1999(4) 3.5729480...