Fig. 9
From: Joint angle estimation during shoulder abduction exercise using contactless technology
Difference plots for \(\alpha _{L}\) at a 2Â m, b 2.5 m, and c 3.5 m; for \(\beta _{L}\) at d 2Â m, e 2.5 m, and f 3.5 m; and for \(\gamma _{L}\) at g 2Â m, h 2.5 m, and i 3.5 m. The upper and lower dashed lines represent the standard deviation, and the middle dashed line shows the mean difference between the two systems