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The media generated by the computer vision module consists of a image with plots, and a annotated video with the calculated center of mass position and lines at the detected top of the head height and ankle height. The center of mass position was calculated according to
LAFOND, D.; DUARTE, M.; PRINCE, F. Comparison of three methods to estimate the center of mass during balance assessment. Journal of Biomechanics https://doi.org/10.1016/S0021-9290(03)00251-3 using the landmarks from the mediapipe model.
In order to detect when the jump starts, we analyze the rate of change of the center of mass’s vertical position. When it starts decreasing rapidly, it means the jump has started. To find when the jump has finished, we find the first frame after the peak of height where the vertical position is back at the baseline of when it started.