Optimum circular fit to weighted data in multi-dimensional space
Pattern Recognition Letters
FreeGaze: a gaze tracking system for everyday gaze interaction
ETRA '02 Proceedings of the 2002 symposium on Eye tracking research & applications
Real-time eye detection and tracking under various light conditions
ETRA '02 Proceedings of the 2002 symposium on Eye tracking research & applications
What's in the eyes for attentive input
Communications of the ACM
FGR '02 Proceedings of the Fifth IEEE International Conference on Automatic Face and Gesture Recognition
Eye localization for face matching: is it always useful and under what conditions?
CIVR '08 Proceedings of the 2008 international conference on Content-based image and video retrieval
Pupil center detection in low resolution images
Proceedings of the 2010 Symposium on Eye-Tracking Research & Applications
Robust pupil detection for gaze-based user interface
Proceedings of the 2010 workshop on Eye gaze in intelligent human machine interaction
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Eyegaze is one of an alternative input methods. Nowadays, the videoculography (VOG) is the most suitable for this purpose. Eye pupil center position is necessary for evaluation of gaze direction. The novel pupil center co-ordinates extraction method was proposed. The method exploits averaging of pupil edge co-ordinates in the same scan line. Obtained points are aproximated by line. Pupil center is estimated as intersection of vertical and horizontal lines. Accuracy of method was tested using synthetic eye images. The novel method accuracy is similar to one of approximation by circle method, when an eye is looking straight a head. The proposed method has better computational effectiveness and smaller errors in tertiary eye positions. Errors for both methods increase versus noise standard deviation with the same slope. However the influence of noise is small, if region between iris and pupil is sharp.