SaccadeFeatures

class eyefeatures.features.stats.SaccadeFeatures(features_stats=None, **kwargs)

Bases: StatsTransformer

Saccade Features Transformer. The transformer identifies saccades from fixations and extract their features.

Supported Metrics

• length: Amplitude in pixels.

\[\text{Length(Saccade}_i\text{)} = ||\text{Fixation}_{i+1} - \text{Fixation}_{i} ||_{2}\]

• speed: Velocity in pixels/ms.

\[\text{Speed(Saccade}_i\text{)} = \frac{\text{Length(Saccade}_i\text{)}}{\text{Time}_{i+1} - \text{Time}_{i}}\]

• acceleration: Acceleration in pixels/ms².

\[\text{Acceleration(Saccade}_i\text{)} = \frac{1}{2} \frac{\text{Speed(Saccade}_i\text{)} }{\text{Time}_{i+1} - \text{Time}_{i}}\]