PyFixation 0.3.1

A library for classifying raw eye gaze data into discrete events like saccades and fixations.

pyfixation is a Python package for classifying raw eye gaze data into discrete events like saccades and fixations. This package can be used online in real-time or offline after data has been collected.

Algorithms

• DispersionFP implements standard I-DT algorithm.

• VelocityFP uses a Savitzky-Golay filter to calculate velocity.

Examples

Here’s a basic example of how to use the dispersion based algorithm:

from pyfixation import DispersionFP

px_per_mm = 3.55

fp = DispersionFP( px_per_mm, sample_rate = 500 )

f = open( 'gazedata.txt', 'r' )
for line in f.readlines():
        gaze_found, gaze_x, gaze_y = map( float, line.split( '\t' ) )
        print fp.detect_fixation( gaze_found, gaze_x, gaze_y )