Research and Validations


Comparison of accuracy: markerless tracking vs. marker-based tracking


March 2017

Title: Evaluation of Markerless Tracking for Kinematics in Tennis

Author: H. Frühschütz (Technical University Munich, Faculty Sport and Health Sciences)

Content: This work describes accuracy of joint position and joint angles of markerless tracking compared to marker based tracking for the specific case of high performance tennis. The thesis also discusses sport applied value for trainers and coaches in using the technology.

Complete thesis (Link to university's online library)

Publication for oral session at ISBS 2017 (pdf)

----

October 2016

Title: Validation of 3D silhouette tracking as clinical movement analysis tool

Author: A. Henrichs (Münster University of Applied Sciences, Department of Engineering Physics)

Content: This master thesis examines markerless and hybrid tracking as a more simple, objective and reliable method to perform back to sport sreening compared to rater-based 2D video screenings and marker-based 3D motion capture.

Complete thesis (pdf)

----

May 2016

Title: Evaluation of markerless 3D joint position accuracy using high end vs. low end camera setups

Author: K. Braunias (Koblenz University of Applied Sciences, RheinAhrCampus, Faculty of Mathematics and Technology)

Content: This work describes the accuracy of markerless tracking concerning joint positions relative to full marker based tracking when using 8, 6, 4 and 3 cameras only as well as using low end GoPro cameras.

Complete thesis (pdf)

----

March 2016

Title: Possibilities and Limitations of the Newest Generation of Video Based 3D Gait Analysis System.  

Authors: V. Hirschmann (1), Ph. Russ (2), L. Becker (2), W. Strobl (1)
1 Hospital  Rummelsberg,  Schwarzenbruck,  Germany
2 Simi Reality Motion Systems GmbH, Unterschleissheim, Germany

Source: 30th Annual Meeting of the Children’s Orthopaedics, Munich, Neuroorthopedics: Lecture VKO-151. Journal of Children's Orthopaedics, Volume 10, Issue 6, p. 731-732 (2016).

Article (pdf)

Source: Congress of GAMMA at Hospital Rummelsberg

Poster (pdf - sorry file is only available in German)

----

January 2016

Title: Evaluation of joint angle accuracy using markerless silhouette-based tracking and hybrid tracking against traditional marker tracking

Author: L. Becker (Otto-von-Guericke-University Magdeburg, Faculty of Humanities, Institute of Sport Science)

Content: This thesis describes the accuracy of joint angle calculations with Simi Shape using markerless and hybrid tracking compared to marker-based data.

Complete thesis (pdf)

Poster 1: evaluation specific joint movements (pdf)
Poster 2: evaluation complex movements (pdf)

Publication at ECSS Congress Vienna/Austria

----

2016

Title: Prediction of ground reaction forces and moments by using gait analysis silhouette tracking method compared to marker tracking and force platform method

Authors: M. Muehling (1), T. Weber (1),(2), Ph. Russ (3), S. Dendorfer (1),(2) 
1 Laboratory for Biomechanics, Ostbayerische Technische Hochschule Regensburg, Regensburg, Germany 
2 Regensburg Center of Biomedical Engineering, OTH and University Regensburg, Regensburg, Germany 
3 Simi Reality Motion Systems GmbH, Unterschleissheim, Germany

Content: This work describes accuracy of ground reaction force and joint moment prediction by using only markerless tracking data instead of marker data and force plates. This work is a first proof of concept for getting markerless 3D data and predicting forces, athletes can now be tested just on their playground during training or competitions analyzing full kinematics and even kinetics - no limits to a lab, no preparation of athletes, no specific limited areas for testing an athlete.

Complete thesis (pdf)

-------------------------------------------------------------------------


Inertial Measurement Units (IMU) in marker-based and markerless mocap

Title: Implementation and Validation of Inertial Measurement Units in marker-based and marker-less 3D motion tracking

Author: M. Henkel (Munich University of Applied Sciences, Department of Applied Sciences and Mechatronics)

Content: This work describes implementation and provides accuracy evaluation of IMU based motion capture and hybrid markerless capture through IMU support within Simi Motion and Simi Shape.

Complete thesis (pdf)

-------------------------------------------------------------------------


Accuracy of traditional marker tracking in Simi Motion

Title: Validation of a dynamic calibration method for video supported movement analysis

Author: J. Bader (Technical University of Munich TUM, Department of Sport and Health Sciences)

Content: This thesis describes the accuracy of marker tracking with Simi Motion in comparison to Vicon.

Complete thesis (pdf)