SavGolFilter

class eyefeatures.preprocessing.smoothing.SavGolFilter(x, y, t=None, pk=None, window_length=11, polyorder=2, **savgol_kw)

Bases: BaseSmoothingPreprocessor

Savitzky-Golay filter. ‘x’ and ‘y’ directions are filtered independently, time is ignored. Parameters are passed to scipy.signal.savgol_filter.

Notes

Default values are taken from https://arxiv.org/pdf/2303.02134.

Parameters:

• x (str)

• y (str)

• t (str)

• pk (list[str])

• window_length (int)

• polyorder (int)

Algorithm

Fits \(k\)-degree polynomial using \(k\) last points in sequence with OLS.