Loading...
Comparing and combining time series trajectories using Dynamic Time Warping
Vaughan, Neil Gabrys, Bogdan
Vaughan, Neil
Gabrys, Bogdan
Citations
Altmetric:
Advisors
Editors
Other Contributors
Affiliation
EPub Date
Publication Date
2016-09-04
Submitted Date
Collections
Files
Other Titles
Abstract
This research proposes the application of dynamic time warping (DTW) algorithm to analyse multivariate data from virtual reality training simulators, to assess the skill level of trainees. We present results of DTW algorithm applied to trajectory data from a virtual reality haptic training simulator for epidural needle insertion. The proposed application of DTW algorithm serves two purposes, to enable (i) two trajectories to be compared as a similarity measure and also enables (ii) two or more trajectories to be combined together to produce a typical or representative average trajectory using a novel hierarchical DTW process.
Our experiments included 100 expert and 100 novice simulator recordings. The data consists of multivariate time series data-streams including multi-dimensional trajectories combined with force and pressure measurements.
Our results show that our proposed application of DTW provides a useful time-independent method for (i) comparing two trajectories by providing a similarity measure and (ii) combining two or more trajectories into one, showing higher performance compared to conventional methods such as linear mean. These results demonstrate that DTW can be useful within virtual reality training simulators to provide a component in an automated scoring and assessment feedback system.
Citation
Vaughan, N., & Gabrys, B. (2016). Comparing and combining time series trajectories using Dynamic Time Warping. Procedia Computer Science, 96, 465-474. https://doi.org/10.1016/j.procs.2016.08.106
Publisher
Elsevier
Journal
Procedia Computer Science
Research Unit
PubMed ID
PubMed Central ID
Type
Article
Language
en
Description
Series/Report no.
ISSN
EISSN
1877-0509