A new technique for foot-off and foot contact detection in a gait cycle based on the knee joint angle using microsoft kinect v2

Abstract:

The Microsoft Kinect RGB-D sensor has been proven to be a reliable tool for gait analysis and rehabilitation purposes. Although it is accurate for detecting upper body part movements, even the second iteration of the Kinect sensor lacks the accuracy when it comes to lower extremities. while detecting foot-off and foot contact phases of a gait cycle is an important part of a gait performance analysis, The Kinect’s intrinsic inaccuracies make it an unreliable tool to detect them accurately. We propose a new Kinect based technique for detecting foot-off and foot contact phases in a gait cycle that solely relies on a subject’s knee joint relative angle. The system was tested on 11 healthy subjects walking in pre-defined pathways in 12 walking sessions while the Kinect v2 camera was placed at different heights ranging from 0.65 to 1.57 and angles ranging from 0 to 45 degrees to the ground. The algorithm’s accuracy was also compared to another footstep detection method based on the subject’s ankle joints height to the ground. The results showed 86.52% accuracy in detecting foot-off and foot contact events on average for both feet.
Date of Conference: 16-19 Feb. 2017
Date Added to IEEE Xplore: 13 April 2017
ISBN Information:
Electronic ISBN: 978-1-5090-4179-4
Print on Demand(PoD) ISBN: 978-1-5090-4180-0
INSPEC Accession Number: 16822999
Publisher: IEEE
Conference Location: Orlando, FL, USA

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Authors

College of Engineering Design and Physical Sciences, Department of Electronics and Computer Engineering, Brunel University London, UK
College of Engineering Design and Physical Sciences, Department of Electronics and Computer Engineering, Brunel University London, UK
School of Engineering & Built Environment, Department of Computer, Communications and Interactive Systems, Glasgow Caledonian University, UK