Fig. 6.

Mean recorded kinematics and mean predicted kinematics across all subjects on two distinct testing sets. The first testing set (left column) consists of data collected at a similar walking speed as that found in the training set. Both the recorded kinematics (blue) and the filtered predictions (orange) from the A-mode ultrasound data are depicted for the normal speed testing set. The second testing set (right column) corresponds to the trial whose speed was faster than that found in the training set. Both the recorded kinematics (purple) and the filtered predictions (yellow) are depicted for the fast speed testing set. Predictions are filtered using a 2^nd order Butterworth filter with a cutoff frequency of 7 Hz.