| Texto completo | |
| Autor(es): |
de Oliveira Bueno, Murilo Jose
[1]
;
Silva, Maisa
[2]
;
Cunha, Sergio Augusto
[3]
;
Toffee, Ricardo da Silva
[4]
;
Moura, Felipe Arruda
[1]
Número total de Autores: 5
|
| Afiliação do(s) autor(es): | [1] Univ Estadual Londrina, Sport Sci Dept, Londrina, Parana - Brazil
[2] Univ Estadual Campinas, Inst Comp, Campinas - Brazil
[3] Univ Estadual Campinas, Coll Phys Educ, Campinas - Brazil
[4] NTNU Norwegian Univ Sci & Technol, Dept ICT & Nat Sci, Alesund - Norway
Número total de Afiliações: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PLoS One; v. 16, n. 9 SEP 1 2021. |
| Citações Web of Science: | 0 |
| Resumo | |
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<plus/minus>0.13 and R@10, 0.24 +/- 0.19, p < 0.001) and AllD (P@5 = 0.43<plus/minus>0.36 and P@10 = 0.39 +/- 0.32, p < 0.001; R@5 = 0.13<plus/minus>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. (AU) | |
| Processo FAPESP: | 18/19007-9 - Descobrindo séries temporais dos dribles em um cenário físico-tático-técnico durante jogos profissionais oficiais |
| Beneficiário: | Sergio Augusto Cunha |
| Modalidade de apoio: | Bolsas no Exterior - Pesquisa |
| Processo FAPESP: | 16/50250-1 - O segredo de jogar futebol: Brasil versus Holanda |
| Beneficiário: | Sergio Augusto Cunha |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 17/20945-0 - EMU concedido no processo 16/50250-1: local positioning system |
| Beneficiário: | Sergio Augusto Cunha |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa Equipamentos Multiusuários |