Preprint manuscript of:
Quantitative analysis of accuracy of an inertial/acoustic 6DOF tracking
system
Gilson, S. J., Fitzgibbon, A. W. and Glennerster, A. (Journal of Neuroscience Methods, 154, 175-182 (2006)
gfg.pdf
Abstract
An increasing number of neuroscience experiments are using virtual reality to
provide a more immersive and less artificial experimental environment. This
is particularly useful to navigation and three-dimensional scene perception
experiments. Such experiments require accurate, real-time, tracking of the
observer's head in order to render the virtual scene. Here we present data on
the accuracy of a commonly used 6 degree of freedom tracker (Intersense IS900)
when it is moved in ways typical of virtual reality applications. We compared
the reported location of the tracker with its location computed by an optical
tracking method. When the tracker was stationary, the root mean square error
in spatial accuracy was 0.64mm. However, we found that errors increased over
ten-fold when the tracker moved at speeds common in virtual reality
applications (up to 17mm). We demonstrate that the errors we report here are
predominantly due to inaccuracies of the IS900 system rather than the optical
tracking against which it was compared.
Science Direct (subscription required).
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