In this paper, a novel method for tracking multiple soccer players based on a support vector machine (SVM) and a particle filter is proposed for a monocular fixed soccer video. This paper considers three main topics. First, the state of a particle filter presented in a 3D world coordinate space, instead of a 2D image coordinate space, provides a more realistic model tracking because depth consi...

37 38 The purpose of this study was to evaluate the anthropometric and performance characteristics 39 of high level youth female soccer players by annual-age category (U10-U16). Data were 40 collected from 157 female soccer players (U16; n=46, U14; n=43, U12; n=38, U10; n=30), 41 recruited from three high level female soccer academies in England. Players completed 42 assessments of anthropometr...

BACKGROUND To guarantee equal chances for different age groups, age-related tournaments for male and female players have been established in soccer. However, as registration at birth is not compulsory in some countries, other methods of age determination are needed to prevent participation in the incorrect age group. OBJECTIVES To evaluate the age of soccer players of international U-17 compe...

This paper presents a method for generating synthetic views of a soccer ground starting from a single uncalibrated image. The relative affine structure of the players is computed by exploiting the knowledge of the soccer ground geometry and the fact that the players are in vertical positions. Then, novel views are generated using the “plane+parallax” representation to reproject points.

The purpose of the study was to compare the anthropometric, functional and sport-specific skill characteristics and goal orientations of male youth soccer players at the extremes of height and skeletal maturity in two competitive age groups, 11-12 and 13-14 years. The shortest and tallest players, and least and most skeletally mature players (n = 8 per group) within each age group were compared...

background: the present study was conducted to investigate the possible effects of l-carnitine and glutamine and their synergistic effects on male soccer athletes. methods: 28 male soccer players (21.1 ± 0.7 y) were enrolled in a randomized pre and post intervention, double-blind design. before the intervention, their performances were assessed by bruce protocol, and their body composition was ...

Controversy surrounds the risk of heading a soccer ball. The research objectives were to determine the statistical distributions of head accelerations during soccer heading for adult versus youth players, to compare results with known safe levels, and to suggest steps to reduce risk for children. Monte Carlo simulations of large numbers of head-ball impacts were done using equations of motion b...

The minimax argument represents game theory in its most elegant form: simple but with stark predictions. Although some of these predictions have been confirmed in field data, tests of minimax have generally failed in laboratory experiments that make use of student subjects. In a seminal study, Palacios-Huerta and Volij (2007) present evidence that potentially resolves this puzzle: soccer player...

The aim of this study is to compare game principles performed by 18 youth soccer players taking into account the tactical principles of the game, the action’s place and respective outcome. The sample comprised 763 tactical actions performed by soccer players from one Portuguese club. The test "GK3-3GK" was used to provide the evaluation of tactical actions according to ten basic tactical princi...

The purpose of the study was to evaluate the developmental changes in performance in a repeated-sprint ability (RSA) test in young soccer players of contrasting maturity status. A total of 83 regional level Portuguese youth soccer players, aged 11-13 years at baseline was assessed annually. Stature, body mass, 7x34.2-m sprint protocol (25-s active recovery), 20-m multi-stage continuous shuttle ...