A technique for obtaining spatial kinematic parameters of segments of biomechanical systems from cinematographic data

Miller, N.R.; Shapiro, Robert; McLaughlin, Thomas M.

doi:10.1016/0021-9290(80)90054-8

Cited by 106 publications

(31 citation statements)

References 15 publications

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“…Group 2 systems are free from such camera location requirements but require that the reference points used for calibration be distributed throughout the region of interest (Miller et al, 1980;Wood and Marshall, 1986). Since both techniques produce accuracies of 5 mm in a field of 3 m (Penrose et al, 1976;Shapiro, 1978) a choice of system may be made on the basis of convenience.…”

Section: Cinematographymentioning

confidence: 99%

The simulation of aerial movement—I. The determination of orientation angles from film data

Yeadon

1990

Journal of Biomechanics

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Quantitative mechanical analyses of human movement require the time histories of the angles which specify body configuration and orientation. When these angles are obtained from a filmed performance they may be used to evaluate the accuracy of a simulation model. This paper presents a method of determining orientation angles and their rates of change from film data. The stages used comprise the synchronisation of data obtained from two camera views, the determination of three-dimensional coordinates of joint centres, the calculation of an angle from a sequence of sine and cosine values and the curve fitting of angles using quintic splines. For each stage, other possible approaches are discussed. Original procedures are presented for obtaining individual error estimates of both the film data and the calculated angles to permit the automatic fitting of quintic splines for interpolation and differentiation and for deriving the time history of an angle as a continuous function from a sequence of sine and cosine values. The method is applied to a forward somersault with 1 1 2 twists and the average error estimate of 17 orientation angles is obtained as 2.1 degrees.

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Section: Cinematographymentioning

confidence: 99%

The simulation of aerial movement—I. The determination of orientation angles from film data

Yeadon

1990

Journal of Biomechanics

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“…To establish perceived and actual maximum reaching height, a frame-grabber and digitizing program (Welter, den Brinker, & van Balkom, 1996) were used to determine the image coordinates of the end position of the assessment hold. Image coordinates were translated into realworld coordinates using the direct linear transformation method (Miller, Shapiro, & McLaughlin, 1980;Shapiro, 1978). As indicated above, participants estimated their maximum reaching height twice on each occasion.…”

Section: Methodsmentioning

confidence: 99%

Changes in the perception of action possibilities while climbing to fatigue on a climbing wall

Pijpers

Oudejans

Bakker

2007

Journal of Sports Sciences

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“…a global coordinate system) and those on the participants in all selected images were identified and digitized five times for each marker to increase accuracy. From the two sets of digitized coordinates (one set for each camera), the 3D positions of the anatomical landmarks relative to the global coordinate system were reconstructed with the Direct Linear Transformation method (Miller et al 1980). In this way the positions of the forearm, upper arm, and trunk in the five selected images could be calculated using the 3D coordinates of the anatomical landmarks.…”

Section: Appendix Imentioning

confidence: 99%

Movement patterns of the upper extremity and trunk before and after corrective surgery of impaired forearm rotation in patients with cerebral palsy

Kreulen¹,

Smeulders²,

et al. 2007

Developmental Medicine &Amp; Child Neurology

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The effect of surgical correction of impaired forearm rotation on associated body movement patterns was studied prospectively by comparison of preoperative and postoperative three‐dimensional video analysis of the upper extremity and trunk in eight male and two female patients with hemiplegic cerebral palsy (CP; mean age 16y 2mo [SD 4y 11mo]; range 11–27y). A customized parameter,‘extrinsic forearm rotation’, was used to quantify associated movements supplementing forearm rotation. After surgical correction of the pronation deformity, active forearm supination during a functional reaching task had improved by a mean of 37° in combination with significantly decreased extrinsic forearm rotation by a mean of 13°. In addition, an average loss of 16° of active pronation in combination with increased extrinsic forearm rotation (mean 8°) was observed. On the basis of these results we conclude that successful surgical correction of a pronation deformity in patients with CP directly affects related movement patterns of the upper extremity and trunk.

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A technique for obtaining spatial kinematic parameters of segments of biomechanical systems from cinematographic data

Cited by 106 publications

References 15 publications

The simulation of aerial movement—I. The determination of orientation angles from film data

The simulation of aerial movement—I. The determination of orientation angles from film data

Changes in the perception of action possibilities while climbing to fatigue on a climbing wall

Movement patterns of the upper extremity and trunk before and after corrective surgery of impaired forearm rotation in patients with cerebral palsy

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