title: A New Multi-Sensor Fusion Scheme to Improve the Accuracy of Knee Flexion Kinematics for Functional Rehabilitation Movements.
abstract: Exergames have been proposed as a potential tool to improve the current practice of musculoskeletal rehabilitation. Inertial or optical motion capture sensors are commonly used to track the subject's movements. However, the use of these motion capture tools suffers from the lack of accuracy in estimating joint angles, which could lead to wrong data interpretation. In this study, we proposed a real time quaternion-based fusion scheme, based on the extended Kalman filter, between inertial and visual motion capture sensors, to improve the estimation accuracy of joint angles. The fusion outcome was compared to angles measured using a goniometer. The fusion output shows a better estimation, when compared to inertial measurement units and Kinect outputs. We noted a smaller error (3.96°) compared to the one obtained using inertial sensors (5.04°). The proposed multi-sensor fusion system is therefore accurate enough to be applied, in future works, to our serious game for musculoskeletal rehabilitation.
authors.affiliation: Sorbonne University, Université de Technologie de Compiègne, CNRS, UMR 7338 Biomechanics and Bioengineering, 60200 Compiègne, France. halim.tannous@utc.fr.
authors.forename: Halim
authors.initials: H
authors.lastname: Tannous
authors.affiliation: Sorbonne University, Université de Technologie de Compiègne, CNRS, UMR 7338 Biomechanics and Bioengineering, 60200 Compiègne, France. mircea-dan.istrate@utc.fr.
authors.forename: Dan
authors.initials: D
authors.lastname: Istrate
authors.affiliation: Sorbonne University, Université Pierre et Marie Curie, L2E, Place Jussieu, 75252 Paris, France. aziz.benlarbi_delai@upmc.fr.
authors.forename: Aziz
authors.initials: A
authors.lastname: Benlarbi-Delai
authors.affiliation: Sorbonne University, Université Pierre et Marie Curie, L2E, Place Jussieu, 75252 Paris, France. julien.sarrazin@upmc.fr.
authors.forename: Julien
authors.initials: J
authors.lastname: Sarrazin
authors.affiliation: Sorbonne University, Université de Technologie de Compiègne, CNRS, UMR 7338 Biomechanics and Bioengineering, 60200 Compiègne, France. didier.gamet@utc.fr.
authors.forename: Didier
authors.initials: D
authors.lastname: Gamet
authors.affiliation: Sorbonne University, Université de Technologie de Compiègne, CNRS, UMR 7338 Biomechanics and Bioengineering, 60200 Compiègne, France. marie-christine.ho-ba-tho@utc.fr.
authors.forename: Marie Christine
authors.initials: MC
authors.lastname: Ho Ba Tho
authors.affiliation: Sorbonne University, Université de Technologie de Compiègne, CNRS, UMR 7338 Biomechanics and Bioengineering, 60200 Compiègne, France. tien-tuan.dao@utc.fr.
authors.forename: Tien Tuan
authors.initials: TT
authors.lastname: Dao
mesh_terms: D015374:Biosensing Techniques / Q000379:methods*; D006801:Humans; D009142:Musculoskeletal Physiological Phenomena; D012046:Rehabilitation / Q000379:methods*
keywords: exergames; home-based functional rehabilitation; multi-sensor fusion; orientation estimation