Accuracy improvement in 3D measurement with commercial cameras

In this paper, a procedure for acquisition and processing of the human locomotion system kinematics data is given. Software for a 3D motion analysis system has been developed. Data aquisition was done using two commercial video cameras (camcorders), a framegrabber and PC. Data processing by direct linear transformation provided 3D coordinates of the measured movement. System accuracy, regarding error due to relatively low frame rate and non-synchronised cameras was improved using software. The procedure for synchronisation error elimination is described in detail.