colour.contrast.pupil_diameter_Barten1999¶
- colour.contrast.pupil_diameter_Barten1999(L: FloatingOrArrayLike, X_0: FloatingOrArrayLike = 60, Y_0: Optional[FloatingOrArrayLike] = None) FloatingOrNDArray[source]¶
Return the pupil diameter for given luminance and object or stimulus angular size using Barten (1999) method.
- Parameters
L (FloatingOrArrayLike) – Average luminance \(L\) in \(cd/m^2\).
X_0 (FloatingOrArrayLike) – Angular size of the object \(X_0\) in degrees in the x direction.
Y_0 (Optional[FloatingOrArrayLike]) – Angular size of the object \(X_0\) in degrees in the y direction.
- Returns
Pupil diameter.
- Return type
References
[Bar99], [Bar03], [CKMW04], [InternationalTUnion15c],
Examples
>>> pupil_diameter_Barten1999(100, 60, 60) 2.0777571...