Trajectory of the left front head marker (LFHD) recorded during a one-leg balance trial.

The underlying black line represents the input data for the reconstruction, the blue line represents the measured reference data that was reconstructed and the red line represents the reconstructed marker position. Three cases are shown: In the lower line, 3870 frames (90% of the data) were provided as input data for the reconstruction, 430 frames were reconstructed. The middle line (shifted by +10 mm in each coordinate) shows the case where 2150 frames (50% of the data) were provided as input, 2150 frames were reconstructed. The top line (shifted by +20 mm) shows the case where only 430 frames (10% of the data) were provided as input and 3870 frames were reconstructed. The broken lines and the black circles indicate the first frame from which on the trajectories were reconstructed.