Posture Estimation: A VICON-Based Analysis Utilizing a Custom Belt with Retro-Reflective Markers

The purpose of this work is to show the potential of estimating a person posture by identifying pelvis deviation through a custom-made belt with retro-reflective markers. Markers are measured and identified utilizing VICON system. two points are identified, rightmost and leftmost. The assessment technique is based on the comparison between displacement centroid of both side of the belt and the geometric center of rightmost and leftmost markers on the belt. The validation of this concept was carried on a test subject with a hip inclination. Two movements are recorded, standing and walking, both identifying the improper posture of the subject by showing a displacement between the displacement of 19.01mm between the displacement centroid and the geometric center of the belt.