Stride segmentation during free walk movements using multi-dimensional subsequence dynamic time warping on inertial sensor data

Sensors
Jens BarthBjörn Eskofier

Abstract

Changes in gait patterns provide important information about individuals' health. To perform sensor based gait analysis, it is crucial to develop methodologies to automatically segment single strides from continuous movement sequences. In this study we developed an algorithm based on time-invariant template matching to isolate strides from inertial sensor signals. Shoe-mounted gyroscopes and accelerometers were used to record gait data from 40 elderly controls, 15 patients with Parkinson's disease and 15 geriatric patients. Each stride was manually labeled from a straight 40 m walk test and from a video monitored free walk sequence. A multi-dimensional subsequence Dynamic Time Warping (msDTW) approach was used to search for patterns matching a pre-defined stride template constructed from 25 elderly controls. F-measure of 98% (recall 98%, precision 98%) for 40 m walk tests and of 97% (recall 97%, precision 97%) for free walk tests were obtained for the three groups. Compared to conventional peak detection methods up to 15% F-measure improvement was shown. The msDTW proved to be robust for segmenting strides from both standardized gait tests and free walks. This approach may serve as a platform for individualized stride segmentat...Continue Reading

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Citations

Mar 1, 2017·Journal of Neuroengineering and Rehabilitation·Samuel SchüleinJochen Klucken
Feb 1, 2017·IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society·Vladimir JoukovDana Kulic
Aug 24, 2017·Sensors·Julius HanninkBjoern M Eskofier
Mar 24, 2017·IEEE Journal of Biomedical and Health Informatics·Julius HanninkBjoern M Eskofier
Apr 5, 2018·Sensors·Sebastijan Šprager, Matjaž B Jurič
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Jun 28, 2019·Journal of Neuroengineering and Rehabilitation·An NguyenBjoern M Eskofier
Oct 14, 2017·Sensors·Christine F MartindaleBjoern M Eskofier
Nov 23, 2018·Sensors·Laurent OudrePierre-Paul Vidal
Sep 17, 2019·Journal of Exercise Rehabilitation·Hyun-Seob Lee
May 7, 2020·Frontiers in Neurology·Aliénor Vienne-JumeauDamien Ricard
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Nov 6, 2020·Journal of Neuroengineering and Rehabilitation·Fabian Marcel Rast, Rob Labruyère
Jun 5, 2021·Journal of Neuroengineering and Rehabilitation·Nils RothFelix Kluge

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Software Mentioned

Matlab
ASTRUM
msDTW

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