Unity Lower limb Motion Capture Application

Motion capture systems allow us to study human motion, and their applications can help us improve individuals' health or performance in sports. This article presents the design and implementation of a motion capture system based on inertial measurement units. The application runs on Unity motor engine, which might facilitate future immersive applications development. The proposed motion capture system calculates the joint flexion/extension angles of the hip, knee, and ankle by orientation vectors, and was compared with a Vicon system, considered a Gold Standard, obtaining a root mean squared error of 10 degrees.