Comparison of the performance of 3D camera systems

Velocidade da bola no chute no futsal: comparação entre garotos com diferentes níveis de desempenho e correlação de variáveis preditoras do desempenho

“…A determinação do erro de medida do estudo foi feito através de um teste específi co proposto por Ehara et al 33 e também empregado por Barbieri et al 1 . Para isso, foi utilizada uma haste rígida contendo dois marcadores de 25 mm fi xados nas extremidades a uma distância de 500 mm.…”

A comparison of the upper limb movement kinematics utilized by children playing virtual and real table tennis

“…The cameras tracked the position of the retro-reflective markers in threedimension and this system has demonstrated a reconstruction error of <1mm (Ehara, Fujimoto, Miyazaki, Tanaka, & Yamamoto, 1995;Richards, 1999). Participants were therefore fitted with a set of retro-reflective body markers on their preferred hand, forearm and upper arm in accordance with the calibrated anatomical systems technique, as previously described (Campbell & Alderson, 2009;Campbell & Lloyd, 2009;Mitchinson, Campbell, Oldmeadow, Gibson, & Hopper, 2012;Wu et al, 2005).…”

Assessment and Validation of a Methodology for Measuring Anatomical Kinematics of Restrained Occupants During Motor Vehicle Collisions

“…This is substantiated by the correspondingly low ∆Diag values indicating minimal optical distortion of the cluster during the dynamic event. A number of studies in the literature have been devoted to quantifying performance of commercially available OSS [8][9][10][11][12][13][14]. While single target error for the current study is at the low end of the reported range in the literature, it should be noted that current OSS technology is utilized for the current study.…”

“…The introduction of video-based optoelectronic stereo photogrammetry for PMHS impact loading is relatively recent, however, it has long been utilized in non-impact motion biomechanics applications such clinical gait analysis [5][6][7][8][9][10][11][12][13][14][15][16]. The objective in movement analysis is the reconstruction of anatomical motion in the global OSS reference frame (Figure 2), however, it is generally accepted that a primary limitation of such movement analysis is error in single target position data and the propagation of this error to the estimation of the desired anatomical motion [5,6].…”