Please use this identifier to cite or link to this item:
http://hdl.handle.net/10773/37221
Title: | Full-body motion assessment: concurrent validation of two body tracking depth sensors versus a gold standard system during gait |
Author: | Vilas-Boas, Maria do Carmo Choupina, Hugo Miguel Pereira Rocha, Ana Patrícia Fernandes, José Maria Cunha, João Paulo Silva |
Keywords: | RGB-D camera Kinect Qualisys System validity 3-D motion analysis Gait |
Issue Date: | 18-Apr-2019 |
Publisher: | Elsevier |
Abstract: | RGB-D cameras provide 3-D body joint data in a low-cost, portable and non-intrusive way, when compared with reference motion capture systems used in laboratory settings. In this contribution, we evaluate the validity of both Microsoft Kinect versions (v1 and v2) for motion analysis against a Qualisys system in a simultaneous protocol. Two different walking directions in relation to the Kinect (towards - WT, and away - WA) were explored. For each gait trial, measures related with all body parts were computed: velocity of all joints, distance between symmetrical joints, and angle at some joints. For each measure, we compared each Kinect version and Qualisys by obtaining the mean true error and mean absolute error, Pearson's correlation coefficient, and optical-to-depth ratio. Although both Kinect v1 and v2 and/or WT and WA data present similar accuracy for some measures, better results were achieved, overall, when using WT data provided by the Kinect v2, especially for velocity measures. Moreover, the velocity and distance presented better results than angle measures. Our results show that both Kinect versions can be an alternative to more expensive systems such as Qualisys, for obtaining distance and velocity measures as well as some angles metrics (namely the knee angles). This conclusion is important towards the off-lab non-intrusive assessment of motor function in different areas, including sports and healthcare. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/37221 |
DOI: | 10.1016/j.jbiomech.2019.03.008 |
ISSN: | 0021-9290 |
Appears in Collections: | DETI - Artigos IEETA - Artigos |
Files in This Item:
File | Description | Size | Format | |
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Full-Body Motion Assessment Concurrent Validation of Two Body Tracking.pdf | 2.03 MB | Adobe PDF | View/Open |
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