This work presents an approach to quantify rotations of spheric objects with a single camera. We apply this method to objectively classify racket sports equipment. Therefore, we observe the ball impact on a racket and compare differences in rotations quantified prior to and after the impact. Our approach combines motion segmentation with tracking both the ball center and corners of the surface ...

INTRODUCTION Racket sports require athletes to constantly improve and progress in their physical qualities in order to maintain competitive standards. This includes achieving and maintaining an optimal body composition. However, few studies have been published addressing this topic. OBJECTIVE This study tries to provide a complete anthropometric profile, including somatotype and body composit...

This paper proposes a novel tracking method based on quadrilateral-based segmentation. The tracking method matches quadrilaterals in a region with those in a reference frame to construct region correspondences, from which trajectory of each region can be obtained. The Table Tennis sequence has been used to evaluate the tracking method. Experiment results show that the proposed tracking method c...

Racket’s syntax parameters support the hygienic implementation of syntactic forms that would otherwise introduce implicit identifiers unhygienically.

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The aim of this study was to present kinematics of trunk and upper extremities in tennis players who perform one-handed and two-handed backhand strokes. The study aimed to address the question of whether one of those techniques has some important advantage over the other. If so, what makes it superior? The study included 10 tennis coaches with average coaching experience of 9 years. The coaches...