Single view silhouette fitting techniques for estimating tennis racket position
Deutscher übersetzter Titel: | "Single View Silhouette Fitting" zur Abschätzung der Position des Tennisschlägers |
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Autor: | Elliott, Nathan; Choppin, Simon; Goodwill, Simon; Senior, Terry; Hart, John; Allen, Tom |
Erschienen in: | Sports engineering |
Veröffentlicht: | 21 (2018), 2, S. 137-147, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Elektronische Ressource (online) Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 1369-7072, 1460-2687 |
DOI: | 10.1007/s12283-017-0243-0 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU201807005306 |
Quelle: | BISp |
Abstract des Autors
Stereo camera systems have been used to track markers attached to a racket, allowing its position to be obtained in three-dimensional (3D) space. Typically, markers are manually selected on the image plane, but this can be time-consuming. A markerless system based on one stationary camera estimating 3D racket position data is desirable for research and play. The markerless method presented in this paper relies on a set of racket silhouette views in a common reference frame captured with a calibrated camera and a silhouette of a racket captured with a camera whose relative pose is outside the common reference frame. The aim of this paper is to provide validation of these single view fitting techniques to estimate the pose of a tennis racket. This includes the development of a calibration method to provide the relative pose of a stationary camera with respect to a racket. Mean static racket position was reconstructed to within ±2 mm. Computer generated camera poses and silhouette views of a full size racket model were used to demonstrate the potential of the method to estimate 3D racket position during a simplified serve scenario. From a camera distance of 14 m, 3D racket position was estimated providing a spatial accuracy of 1.9 ± 0.14 mm, similar to recent 3D video marker tracking studies of tennis.