colour.contrast.pupil_diameter_Barten1999#
- colour.contrast.pupil_diameter_Barten1999(L: ArrayLike, X_0: ArrayLike = 60, Y_0: ArrayLike | None = None) NDArrayFloat [source]#
Return the pupil diameter for given luminance and object or stimulus angular size using Barten (1999) method.
- Parameters:
L (ArrayLike) – Average luminance \(L\) in \(cd/m^2\).
X_0 (ArrayLike) – Angular size of the object \(X_0\) in degrees in the x direction.
Y_0 (ArrayLike | None) – Angular size of the object \(X_0\) in degrees in the y direction.
- Returns:
Pupil diameter.
- Return type:
References
[Bar99], [Bar03], [CKMW04], [InternationalTUnion15c], [WY12]
Notes
The Log function is using base 10 as indicated by [WY12].
Examples
>>> pupil_diameter_Barten1999(100, 60, 60) 2.7931307...