I was wondering whether there is the calibration algorithm which allows to correct the calibration automatically under small head movements. I found the video of the link
http://www.alea-technologies.de/pages/e ... nology.php. How does it work to correct automatically?
I am not sure I fully understand what you are asking? The video you a linking to shows a person using an already calibrated eye tracking system. The Eye Tribe dev kit already supports natural head movements once calibrated and improvements in the area will be included in upcoming releases.