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Cited by 12 publications
(5 citation statements)
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“…Following the methods described by Ball and Pierrynowski (1996), for each data frame the XYZ coordinates of each IRED was recorded as a three element column vector. The four IRED vectors that form a cluster were combined to form a 3×4 matrix.…”
Section: Methodsmentioning
confidence: 99%
See 1 more Smart Citation
“…Following the methods described by Ball and Pierrynowski (1996), for each data frame the XYZ coordinates of each IRED was recorded as a three element column vector. The four IRED vectors that form a cluster were combined to form a 3×4 matrix.…”
Section: Methodsmentioning
confidence: 99%
“…This cycle was then broken down into fifty time steps. For each subject, a spatial average (Ball and Pierrynowski, 1996; Ball and Greiner, 2012) of the F [ i ] rotation matrices associated with each two-percentile step was calculated. Then each average rotation matrix was subjected to Cardan angle decomposition to derive a simultaneous assessment about three rotational axes.…”
Section: Methodsmentioning
confidence: 99%
“…Defined in this manner, H and S can be combined to create, D=HS, (8) where the matrix elements of D are, sx sy hxy sz hxz D = sx hyx sy sz hyz . (9) L sx hzx sy hzy sz In constructing (14) it was recognized that S and H could be combined in a different order (H would have to be transposed), but this choice was made since it was felt that S should be placed rightmost (see 8). This was done in preparation for concatenation of the deformation matrix with the target matrix, Pc.…”
Section: Towards a Pliant Surface Modelmentioning
confidence: 99%
“…One way to minimise the marker error's effect, when estimating the helical angle, is to use smoothing techniques (described and compared in Cappello et al 1996). The measurement error can be classified into precision and accuracy as described by Ball and Pierrynowski (1996). The factor that has the biggest effect on kinematical measurements is the relative movement between markers on the skin and the underlying bone .…”
Section: Introductionmentioning
confidence: 99%