Extraction and trace of body joints in human motion capture system

In the marker based human motion capture system, it's a key step to accurately extract and track the 2-D coordinates of the body joints, that because the 3-D reconstruction process and the reliability of the capture system depend heavily on it. Different from those traditional solutions, we use ordinary industrial cameras and take colorful balls as the markers to solve this key point. We have also promoted our solution to solve the problem of occlusion. Finally, we got perfect result in practical applications, and the whole process can be computed in real-time. The method will be extended in the future use.