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Type: Artigo
Title: Are action sport cameras accurate enough for 3d motion analysis? a comparison with a commercial motion capture system
Author: Dalla Bernardina, Gustavo Ramos
Monnet, Tony
Pinto, Heber Teixeira
Leite de Barros, Ricardo Machado
Cerveri, Pietro
Silvatti, Amanda Piaia
Abstract: The aim of this study was to assess the precision and accuracy of an action sport camera (ASC) system (4 GoPro Hero3+ Black) by comparison with a commercial motion capture (MOCAP) system (4 ViconMX40). Both systems were calibrated using the MOCAP protocol and the 3-dimensional (3D) markers coordinates of a T-shaped tool were reconstructed, concurrently. The 3D precision was evaluated by the differences in the reconstructed position using a Bland-Altman test, while accuracy was assessed by a rigid bar test (Wilcoxon rank sum). To examine the accuracy of the action sport camera with respect to the knee flexion angles, a jump and gait task were also examined using 1 subject (Wilcoxon rank sum). The ASC system provided a maximum error of 2.47 mm, about 10 times higher than the MOCAP (0.21 mm). The reconstructed knee flexion angles were highly correlated (r(2) > .99) and showed no significant differences between systems (<2.5 degrees; P > .05). As expected, the MOCAP obtained better 3D precision and accuracy. However, the authors show such differences have little practical effect on reconstructed 3D kinematics
Subject: Calibração
Country: Estados Unidos
Editor: Human Kinetics
Rights: Fechado
Identifier DOI: 10.1123/jab.2017-0101
Date Issue: 2019
Appears in Collections:FEF - Artigos e Outros Documentos

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