Robust Stride Segmentation of Inertial Signals Based on Local Cyclicity Estimation
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 e...
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-04-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/18/4/1091 |
| _version_ | 1828233240529338368 |
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| author | Sebastijan Šprager Matjaž B. Jurič |
| author_facet | Sebastijan Šprager Matjaž B. Jurič |
| author_sort | Sebastijan Šprager |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-12T19:35:25Z |
| format | Article |
| id | doaj.art-90eb3d6fcaf94ba589cef24077005870 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-12T19:35:25Z |
| publishDate | 2018-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-90eb3d6fcaf94ba589cef240770058702022-12-22T03:19:13ZengMDPI AGSensors1424-82202018-04-01184109110.3390/s18041091s18041091Robust Stride Segmentation of Inertial Signals Based on Local Cyclicity EstimationSebastijan Šprager0Matjaž B. Jurič1Faculty of Computer and Information Science, University of Ljubljana, Večna pot 113, SI-1000 Ljubljana, SloveniaFaculty of Computer and Information Science, University of Ljubljana, Večna pot 113, SI-1000 Ljubljana, SloveniaA 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.http://www.mdpi.com/1424-8220/18/4/1091inertial sensorsstride segmentationgait assessmentinertial signalsbiomedical signal processing |
| spellingShingle | Sebastijan Šprager Matjaž B. Jurič Robust Stride Segmentation of Inertial Signals Based on Local Cyclicity Estimation Sensors inertial sensors stride segmentation gait assessment inertial signals biomedical signal processing |
| title | Robust Stride Segmentation of Inertial Signals Based on Local Cyclicity Estimation |
| title_full | Robust Stride Segmentation of Inertial Signals Based on Local Cyclicity Estimation |
| title_fullStr | Robust Stride Segmentation of Inertial Signals Based on Local Cyclicity Estimation |
| title_full_unstemmed | Robust Stride Segmentation of Inertial Signals Based on Local Cyclicity Estimation |
| title_short | Robust Stride Segmentation of Inertial Signals Based on Local Cyclicity Estimation |
| title_sort | robust stride segmentation of inertial signals based on local cyclicity estimation |
| topic | inertial sensors stride segmentation gait assessment inertial signals biomedical signal processing |
| url | http://www.mdpi.com/1424-8220/18/4/1091 |
| work_keys_str_mv | AT sebastijansprager robuststridesegmentationofinertialsignalsbasedonlocalcyclicityestimation AT matjazbjuric robuststridesegmentationofinertialsignalsbasedonlocalcyclicityestimation |