Sebastijan Šprager (Author), Matjaž B. Jurič (Author)

Abstract

A novel approach for stride segmentation, gait sequence extraction, and gait event detection for inertial signals is presented. The approach operates by combining different local cyclicity estimators and sensor channels, and can additionally employ a priori knowledge on the fiducial points of gait events. The approach is universal as it can work on signals acquired by different inertial measurement unit (IMU) sensor types, is template-free, and operates unsupervised. A thorough evaluation was performed with two datasets: our own collected FRIgait dataset available for open use, containing long-term inertial measurements collected from 57 subjects using smartphones within the span of more than one year, and an FAU eGait dataset containing inertial data from shoe-mounted sensors collected from three cohorts of subjects: healthy, geriatric, and Parkinson’s disease patients. The evaluation was performed in controlled and uncontrolled conditions. When compared to the ground truth of the labelled FRIgait and eGait datasets, the results of our evaluation revealed the high robustness, efficiency (F-measure of about 98%), and accuracy (mean absolute error MAE in about the range of one sample) of the proposed approach. Based on these results, we conclude that the proposed approach shows great potential for its applicability in procedures and algorithms for movement analysis.

Keywords

inercialni senzorji;segmentacija korakov;ocenjevanje hoje;inercijski signali;obdelava biomedicinskih signalov;inertial sensors;stride segmentation;gait assessment;inertial signals;biomedical signal processing;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FRI - Faculty of Computer and Information Science
UDC: 004.93:621.391
COBISS: 1537764547 Link will open in a new window
ISSN: 1424-8220
Views: 170
Downloads: 58
Average score: 0 (0 votes)
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Other data

Secondary language: Slovenian
Secondary keywords: inercialni senzorji;segmentacija korakov;ocenjevanje hoje;inercijski signali;obdelava biomedicinskih signalov;
Type (COBISS): Article
Pages: str. 1-24
Volume: ǂVol. ǂ18
Issue: ǂno. ǂ4
Chronology: Apr. 2018
DOI: 10.3390/s18041091
ID: 13641441