Title :
An algebraic method for compensating for coil-placement errors in three-dimensional search-coil eye trackers
Author :
MacLean, James ; Frecker, Richard C.
Author_Institution :
Dept. of Electr. Eng., Toronto Univ., Ont., Canada
Abstract :
A method for compensating for coil-placement errors in three-dimensional scleral search-coil eye trackers is described. The position of the coils may be measured exactly and simply. The error-compensation method avoids the use of difficult transcendental equations by expressing eye position as a linear combination of coil position vectors. The coil position vectors are considered to form a rigid, nonorthogonal basis in the frame of reference of the globe. The constants relating eye position to this basis can be derived from a calibration session
Keywords :
algebra; biological techniques and instruments; eye; 3D search-coil eye trackers; algebraic method; coil position vectors; coil-placement errors compensation; difficult transcendental equations; globe; reference frame; rigid nonorthogonal basis; Biomedical measurements; Calibration; Coils; Equations; Error correction; Magnetic field measurement; Motion measurement; Position measurement; Vectors; Voltage;
Conference_Titel :
Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in
Conference_Location :
Seattle, WA
DOI :
10.1109/IEMBS.1989.95957
