Detection of Single Ball Contacts using a Radio-based Tracking System - A Basis for Technical Performance Analysis

Nicolas Witt, Matthias Völker, Björn M. Eskofier

Abstract

The usage of tracking technology in sports became standard in most major team sports like soccer, basketball or American football. Official tracking in soccer is done by video tracking and is currently limited to physical assessments of the players. New high rate tracking technologies for players and balls could also enable a detailed technical assessment of athletes. This work investigates the detection of single ball contacts, distinguishing left and right foot, using a radio based real-time tracking system. Ball tracking is done at 2000 Hz and player tracking at 200 Hz. Miniaturized transmitters were attached to the shins, enabling the distinction between left and right contacts with the ball. Data acquisition was done in an indoor environment. Six small sided games (749 contacts) and 25 repetitions of training exercises (195 contacts) were recorded. The ground truth of 941 single ball contacts was assessed by video annotation. Detection in the training scenario shows a precision of 97-100 % and a recall of 87-100 %. For the game scenario, precision is 89 % and recall reaches 93 %. Detection errors mainly affect non crucial contacts during longer dribblings, which are not the main interest of many analyses. The high precision and recall rates indicate a solid base for higher level technical assessments in automatic match (statistics) and training analysis (skill evaluation).

References

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Paper Citation


in Harvard Style

Witt N., Völker M. and M. Eskofier B. (2016). Detection of Single Ball Contacts using a Radio-based Tracking System - A Basis for Technical Performance Analysis . In - icSPORTS, ISBN , pages 0-0


in Bibtex Style

@conference{icsports16,
author={Nicolas Witt and Matthias Völker and Björn M. Eskofier},
title={Detection of Single Ball Contacts using a Radio-based Tracking System - A Basis for Technical Performance Analysis},
booktitle={ - icSPORTS,},
year={2016},
pages={},
publisher={SciTePress},
organization={INSTICC},
doi={},
isbn={},
}


in EndNote Style

TY - CONF
JO - - icSPORTS,
TI - Detection of Single Ball Contacts using a Radio-based Tracking System - A Basis for Technical Performance Analysis
SN -
AU - Witt N.
AU - Völker M.
AU - M. Eskofier B.
PY - 2016
SP - 0
EP - 0
DO -