Tobii Ab

Anders Dahl

Niklas Ollesson

Anna Redz

Per Fogelström

Oscar Danielsson

Tommaso Martini

Patrik Barkman

Mårten Nilsson

Carl Asplund

Jonas Sjöstrand

Mattias I Karlsson

Martini Tommaso

Oskar Danielsson

There is provided mechanisms for calibration of an eye tracking system. An eye tracking system comprises a pupil centre corneal reflection (PCCR) based eye tracker and a non-PCCR based eye tracker. A method comprises obtaining at least one first eye position of a subject by applying the PCCR based eye tracker on an image set depicting the subject. The method comprises calibrating a head model of the non-PCCR based eye tracker, as applied on the image set, for the subject using the obtained at least one first eye position from the PCCR based eye tracker as ground truth. The head model comprises facial features that include at least one second eye position. The calibrating involves positioning the head model in order for its at least one second eye position to be consistent with the at least one first eye position given by the PCCR based eye tracker.

Calibration of an eye tracking system

A method for training an eye tracking model is disclosed, as well as a corresponding system and storage medium. The eye tracking model is adapted to predict eye tracking data based on sensor data from a first eye tracking sensor. The method comprises receiving sensor data obtained by the first eye tracking sensor at a time instance and receiving reference eye tracking data for the time instance generated by an eye tracking system comprising a second eye tracking sensor. The reference eye tracking data is generated by the eye tracking system based on sensor data obtained by the second eye tracking sensor at the time instance. The method comprises training the eye tracking model based on the sensor data obtained by the first eye tracking sensor at the time instance and the generated reference eye tracking data.

Training an eye tracking model

Methods and corresponding systems of controlling illuminators in an eye tracking system are disclosed. The system includes a first image sensor, a second image sensor, a first close illuminator arranged to capture bright pupil images by the first image sensor, a second close illuminator arranged to capture bright pupil images by the second image sensor and one or more far illuminators arranged to capture dark pupil images by the first image sensor and the second image sensor. In the methods main and support illuminators are controlled during exposure of a first and a second image sensor to produce enhanced contrast and glint position for eye/gaze tracking.

Support glint for remote eye tracking

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Danderyd, Sweden

Anders Dahl