title: Automatic recognition and scoring of olympic rhythmic gymnastic movements.
abstract: We describe a conceptually simple algorithm for assigning judgement scores to rhythmic gymnastic movements, which could improve scoring objectivity and reduce judgemental bias during competitions. Our method, implemented as a real-time computer vision software, takes a video shot or a live performance video stream as input and extracts detailed velocity field information from body movements, transforming them into specialized spatio-temporal image templates. The collection of such images over time, when projected into a velocity covariance eigenspace, trace out unique but similar trajectories for a particular gymnastic movement type. By comparing separate executions of the same atomic gymnastic routine, our method assigns a quality judgement score that is related to the distance between the respective spatio-temporal trajectories. For several standard gymnastic movements, the method accurately assigns scores that are comparable to those assigned by expert judges. We also describe our rhythmic gymnastic video shot database, which we have made freely available to the human movement research community. The database can be obtained at http://www.milegroup.net/apps/gymdb/.
authors: Department of Special Teaching, Area of Physical Education and Sports, University of Vigo, Ourense 32004, Spain. Electronic address: pinod@uvigo.es.
authors: M Pino
authors: MP
authors: Díaz-Pereira
authors: Department of Computer Science, University of Vigo, Ourense 32004, Spain.
authors: Iván
authors: I
authors: Gómez-Conde
authors: Department of Computer Science, University of Vigo, Ourense 32004, Spain.
authors: Merly
authors: M
authors: Escalona
authors: Department of Computer Science, University of Vigo, Ourense 32004, Spain. Electronic address: olivieri@ei.uvigo.es.
authors: David N
authors: DN
authors: Olivieri
mesh_terms: D000293:Adolescent; D000465:Algorithms; D001185:Artificial Intelligence; D054874:Athletic Performance; D001332:Automatism / Q000523:psychology*; D002648:Child; D005260:Female; D006173:Gymnastics / Q000523:psychology*; D006801:Humans; D007600:Judgment; D021641:Recognition, Psychology; D012984:Software; D014741:Video Recording
keywords: Human motion recognition; PCA; Quality of movement; Spatio-temporal analysis; Sports scoring