Determination of sway area by Fourier analysis of its contour

Authors:
France Sevšek
Affiliations:
University of Ljubljana, University College of Health Studies, Ljubljana, Slovenia
Venue:
ACS'06 Proceedings of the 6th WSEAS international conference on Applied computer science
Year:
2006

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Abstract

A new method is presented for the calculation of the area of the centre of pressure (COP) trajectory (sway area) for subjects standing still on a force platform. The outline of the COP area is determined by detecting the points that are furtherest from the centre in a given angular interval. To this outline a Fourier series is fitted so that the points inside and outside are weighted differently. The procedure has been successfully tested with simulated and clinical data.