Pistol: Pupil Invisible Supportive Tool to extract Pupil, Iris, Eye Opening, Eye Movements, Pupil and Iris Gaze Vector, and 2D as well as 3D Gaze

TL;DR

Pistol is a comprehensive software tool that extracts detailed eye features and estimates gaze in 2D and 3D, aiding researchers in eye-tracking studies with improved feature extraction capabilities.

Contribution

This paper introduces Pistol, a novel software that extracts multiple eye features and performs gaze estimation, compatible with Pupil Invisible and other eye trackers.

Findings

Extracts pupil and iris features including ellipses and vectors

Performs 2D and 3D gaze estimation using neural networks and fitting methods

Supports offline analysis for eye-tracking research

Abstract

This paper describes a feature extraction and gaze estimation software, named \textit{Pistol} that can be used with Pupil Invisible projects and other eye trackers in the future. In offline mode, our software extracts multiple features from the eye including, the pupil and iris ellipse, eye aperture, pupil vector, iris vector, eye movement types from pupil and iris velocities, marker detection, marker distance, 2D gaze estimation for the pupil center, iris center, pupil vector, and iris vector using Levenberg Marquart fitting and neural networks. The gaze signal is computed in 2D for each eye and each feature separately and for both eyes in 3D also for each feature separately. We hope this software helps other researchers to extract state-of-the-art features for their research out of their recordings. Link: https://es-cloud.cs.uni-tuebingen.de/d/8e2ab8c3fdd444e1a135/?p=%2FPISTOL&mode=list