Method and system for realizing human chain structure model

The invention relates to a method and a system for realizing a human chain structure model. The method comprises the following steps of: 1, extracting a key frame sequence of a three-dimensional characteristic point sequence of human motion; and 2, obtaining candidate combination of the human chain structure model according to the absolute orientation algorithm and rigid body distance constraint, and selecting correctly established human chain structure model from the candidate combination by a user. The method and the system for realizing the human chain structure model can establish a model of any chain structure individual, and also provide good prior model and basis for the motion tracking while simplifying the model establishment process. The human structure model which is directly labeled can be obtained without complex manual operation by presetting the three-dimensional characteristic point sequence of the human motion; and the initialization work of the human structure model is simplified during the motion tracking. The established human structure model can be directly applied to the motion tracking and is convenient and quick.