A markerless system based on smartphones and webcam for the measure of step length, width and duration on treadmill

Computer Methods and Programs in Biomedicine
V BaroneSandro Fioretti

Abstract

A markerless low cost prototype has been developed for the determination of some spatio-temporal parameters of human gait: step-length, step-width and cadence have been considered. Only a smartphone and a high-definition webcam have been used. The signals obtained by the accelerometer embedded in the smartphone are used to recognize the heel strike events, while the feet positions are calculated through image processing of the webcam stream. Step length and width are computed during gait trials on a treadmill at various speeds (3, 4 and 5 km/h). Six subjects have been tested for a total of 504 steps. Results were compared with those obtained by a stereo-photogrammetric system (Elite, BTS Engineering). The maximum average errors were 3.7 cm (5.36%) for the right step length and 1.63 cm (15.16%) for the right step width at 5 km/h. The maximum average error for step duration was 0.02 s (1.69%) at 5 km/h for the right steps. The system is characterized by a very high level of automation that allows its use by non-expert users in non-structured environments. A low cost system able to automatically provide a reliable and repeatable evaluation of some gait events and parameters during treadmill walking, is relevant also from a clinica...Continue Reading

References

Feb 4, 1998·Electroencephalography and Clinical Neurophysiology·H StolzeM Illert
May 6, 2004·Gait & Posture·Marius HenriksenB Danneskiod-Samsøe
Jun 16, 2004·Gait & Posture·Tammy M Owings, Mark D Grabiner
Feb 8, 2011·Gait & Posture·Elif SurerUgo Della Croce
Dec 17, 2011·Gait & Posture·Patricia M McAndrew Young, Jonathan B Dingwell
Feb 10, 2012·Journal of Neuroengineering and Rehabilitation·Alper KöseUgo Della Croce
Aug 31, 2013·Physical Therapy in Sport : Official Journal of the Association of Chartered Physiotherapists in Sports Medicine·Ryan J LeighReed Ferber
Nov 30, 2013·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Douglas N SavinJill Whitall

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Citations

May 4, 2017·Expert Review of Medical Devices·Aliaa Rehan Youssef, Mohammed Gumaa
Mar 21, 2020·Frontiers in Bioengineering and Biotechnology·Matteo ZagoManuela Galli

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