# colour.contrast.maximum_angular_size_Barten1999¶

colour.contrast.maximum_angular_size_Barten1999(u, X_0=60, X_max=12, N_max=15)[source]

Returns the maximum angular size $$X$$ of the object considered using Barten (1999) method.

Parameters: u (numeric) – Spatial frequency $$u$$, the cycles per degree. X_0 (numeric or array_like, optional) – Angular size $$X_0$$ in degrees of the object in the x direction. X_max (numeric or array_like, optional) – Maximum angular size $$X_{max}$$ in degrees of the integration area in the x direction. N_max (numeric or array_like, optional) – Maximum number of cycles $$N_{max}$$ over which the eye can integrate the information. Maximum angular size $$X$$ of the object considered. numeric or ndarray

References

Examples

>>> maximum_angular_size_Barten1999(4)  # doctest: +ELLIPSIS
3.5729480...