Figure 5
From: Arm movement speed assessment via a Kinect camera: A preliminary study in healthy subjects
Comparison of instantaneous non-filtered velocity (left), filtered velocity (middle), and filtered acceleration (right) of a slow motion for four joints: shoulder, elbow, wrist and hand of the right arm. The plots are carried out for one motion of one subject. For a clearer graph, extra vertical space has been added between the plots, however the scale ratio has been preserved. From bottom to top are shoulder, elbow, wrist, and hand, respectively. The cutoff frequency of the Butterworth low-pass filter was 6 Hz.