Football-specific validity of TRACAB's optical video tracking systems

PloS One
Daniel LinkeMartin Lames

Abstract

The present study aimed to validate and compare the football-specific measurement accuracy of two optical tracking systems engineered by TRACAB. The "Gen4" system consists of two multi-camera units (a stereo pair) in two locations either side of the halfway line, whereas the distributed "Gen5" system combines two stereo pairs on each side of the field as well as two monocular systems behind the goal areas. Data were collected from 20 male football players in two different exercises (a football sport-specific running course and small-sided games) in a professional football stadium. For evaluating the accuracy of the systems, measures were compared against simultaneously recorded measures of a reference system (VICON motion capture system). Statistical analysis uses RMSE for kinematic variables (position, speed and acceleration) and the difference in percentages for performance indicators (e.g. distance covered, peak speed) per run compared to the reference system. Frames in which players were obviously not tracked were excluded. Gen5 had marginally better accuracy (0.08 m RMSE) for position measurements than Gen4 (0.09 m RMSE) compared to the reference. Accuracy difference in instantaneous speed (Gen4: 0.09 m⋅s-1 RMSE; Gen5: 0.0...Continue Reading

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Citations

Sep 17, 2020·Sports Biomechanics·Nikolas Sten Knudsen, Thomas Bull Andersen
Dec 3, 2020·International Journal of Environmental Research and Public Health·Juan Del CosoRoberto López-Del Campo
Mar 7, 2021·Sensors·Patrick BlaubergerMartin Lames
Apr 24, 2021·Frontiers in Sports and Active Living·Gabriel Anzer, Pascal Bauer
May 1, 2021·Sensors·Bruno GonçalvesPedro Figueiredo
May 14, 2021·Frontiers in Physiology·Diego Brito de SouzaJuan Del Coso
Aug 3, 2021·Frontiers in Sports and Active Living·Uwe DickUlf Brefeld
Jul 27, 2021·Journal of Sports Sciences·Gabriel AnzerUlf Brefeld
Jul 27, 2021·International Journal of Sports Medicine·Miguel Lorenzo-MartínezEzequiel Rey
Aug 4, 2021·International Journal of Sports Medicine·Daniel Link, Gabriel Anzer
Aug 28, 2021·International Journal of Environmental Research and Public Health·Łukasz RadzimińskiZbigniew Jastrzębski

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Software Mentioned

VICON
Gen4
TRACAB
EPTS
Inmotio
MATLAB
STATS
Nexus
Deltatre
SportVU

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