Comparison of the performance of 3D camera systems

Accuracy and processing time of commercially available 3D camera systems for clinical gait measurement were measured. Tested systems were: Quick MAG, Video Locus, Peak 5, Ariel, Vicon 370, Elite, Kinemetrix 3D, and Optotrack 3020. For the accuracy measurements, the positions of markers on both ends of a rigid bar were measured and the distance of these markers was calculated and compared to the true value. For the processing time, the time for calculating 3D coordinates from data obtained during normal gait was measured. These values will be useful for intending purchasers of 3D camera systems.