Validation of ball spin estimates in tennis from multi-camera tracking data
The purpose of this study was to examine the accuracy of methods to estimate ball spin rate and spin axis direction using multi-camera tracking technology. The method implemented by Hawk-Eye and a theoretical ball trajectory model were assessed for their accuracy against high speed-vision. A theoretical ball trajectory model was found to estimate ball spin rate and the spin axis direction more accurately than the method used by Hawk-Eye. The superior performance of the ball trajectory model was indicated by a lower mean bias and standard deviation (2.92 ± 222.76) than Hawk-Eye (-100.01 ± 542.44), as well as narrower limits of agreement and a 327.63 RPM lower RMSE. Spin rates less than 4500 RPM were estimated with the highest accuracy, but neither method was able to consistently and accurately estimate spin rates >4500 RPM. The application of a trajectory model to multi-camera ball tracking data provides a practical and non-invasive method to accurately estimate the spin imparted when hitting, allowing for large-scale collection of spin rates during matches.
© Copyright 2020 Journal of Sports Sciences. Taylor & Francis. Kaikki oikeudet pidätetään.
Aiheet: | tennis liike biomekaniikka analyysi seuranta |
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Aihealueet: | urheilukilpailut tekniset ja luonnontieteet |
Tagging: | Hawk-Eye |
DOI: | 10.1080/02640414.2019.1697189 |
Julkaisussa: | Journal of Sports Sciences |
Julkaistu: |
2020
|
Vuosikerta: | 38 |
Numero: | 3 |
Sivuja: | 296-303 |
Julkaisutyypit: | artikkeli |
Kieli: | englanti (kieli) |
Taso: | kehittynyt |