Investigation of Calibration Techniques in Video Based Eye Tracking System

Authors:
Nerijus Ramanauskas;Gintautas Daunys;Donatas Dervinis
Affiliations:
Siauliai University, Siauliai, Lithuania 76353;Siauliai University, Siauliai, Lithuania 76353;Siauliai University, Siauliai, Lithuania 76353
Venue:
ICCHP '08 Proceedings of the 11th international conference on Computers Helping People with Special Needs
Year:
2008

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Abstract

Exact calibration in real time is critical for gaze control systems. Five different calibration techniques were investigated: a standard calibration using linear and second order models (9 and 25 points); 2D mapping with interpolation; a mapping with developed model, describing eye image formation process. Results show that there is no significant difference between polynomial calibration method and a mapping with developed model. Calibration using model has an advantage, because there is no need to follow a whole calibration points each time. The point of gaze accuracy achieved during experiments is less than 1 degree.