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Multiscale fractal dimension applied to tactical analysis in football: A novel approach to evaluate the shapes of team organization on the pitch.
Bueno, Murilo José de Oliveira; Silva, Maisa; Cunha, Sergio Augusto; Torres, Ricardo da Silva; Moura, Felipe Arruda.
Afiliação
  • Bueno MJO; Sport Sciences Department, State University of Londrina, Londrina, Brazil.
  • Silva M; Institute of Computing, University of Campinas, Campinas, Brazil.
  • Cunha SA; College of Physical Education, University of Campinas, Campinas, Brazil.
  • Torres RDS; Department of ICT and Natural Sciences, NTNU-Norwegian University of Science and Technology, Ålesund, Norway.
  • Moura FA; Sport Sciences Department, State University of Londrina, Londrina, Brazil.
PLoS One ; 16(9): e0256771, 2021.
Article em En | MEDLINE | ID: mdl-34469462
The aim of this study was to evaluate different shape descriptors applied to images of polygons that represent the organization of football teams on the pitch. The effectiveness of different shape descriptors (area/perimeter, fractal area, circularity, maximum fractal, rectangularity, multiscale fractal curve-MFC), and the concatenation of all shape descriptors (except MFC), denominated Alldescriptors (AllD)) was evaluated and applied to polygons corresponding to the shapes represented by the convex hull obtained from players' 2D coordinates. A content-based image retrieval system (CBIR) was applied for 25 users (mean age of 31.9 ± 8.4 years) to evaluate the relevant images. Measures of effectiveness were used to evaluate the shape descriptors (P@n and R@n). The MFD (P@5, 0.46±0.37 and P@10, 0.40±0.31, p < 0.001; R@5, 0.14±0.13 and R@10, 0.24±0.19, p < 0.001) and AllD (P@5 = 0.43±0.36 and P@10 = 0.39±0.32, p < 0.001; R@5 = 0.13±0.11 and R@10 = 0.24±0.20, p < 0.001) descriptors presented higher values of effectiveness. As a practical demonstration, the best evaluated shape descriptor (MFC) was applied for tactical analysis of an official match. K-means clustering technique was applied, and different shapes of organization could be identified throughout the match. The MFC was the most effective shape descriptor in relation to all others, making it possible to apply this descriptor in the analysis of professional football matches.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Futebol / Modelos Teóricos Limite: Adult / Humans / Male País/Região como assunto: America do sul / Brasil Idioma: En Revista: PLoS One Assunto da revista: CIENCIA / MEDICINA Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Futebol / Modelos Teóricos Limite: Adult / Humans / Male País/Região como assunto: America do sul / Brasil Idioma: En Revista: PLoS One Assunto da revista: CIENCIA / MEDICINA Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos