Autocalibration based partioning relationship and parallax relation for head-mounted eye trackers

Sacha Bernet (1) , Christophe Cudel (1) , Damien Lefloch (1) , Michel Basset (1)

1 MIPS - Modélisation, Intelligence, Processus et Système

This paper presents new methods to calibrate a head-mounted Eye Tracker (ET) automatically, as well as a new way to obtain an estimated point of regard (POR), taking account of the parallax. Calibration is performed in real time; it is easy for the user who just needs to look at one calibration pattern for a few seconds before starting. This method provides a very important couple of points which helps to use a local relationship to compute the POR instead of a global one. This approach significantly improves the precision of the points of regard when the scene camera is mounted with a short focal lens. An estimation of POR when the user looks somewhere outside the calibration distance is also proposed. This estimation is based on an ET modelling such as a stereovision system, to take account of the parallax effect. The aim of this study is to simplify the use of ET techniques for "non-initiated" people, especially here learner drivers.

Mots clés: Eye tracking; Calibration; Image processing

Domaines: Traitement du signal et de l'image [eess.SP]; Traitement du signal et de l'image [eess.SP]

Sacha Bernet, Christophe Cudel, Damien Lefloch, Michel Basset. Autocalibration based partioning relationship and parallax relation for head-mounted eye trackers. Machine Vision and Applications, 2013, 24 (Issue 2), pp.393-406. ⟨10.1007/s00138-012-0427-3⟩. ⟨hal-00982309⟩