skeleton motion extraction method by means of optical-based motion capture data

The invention discloses a bone sport extracting method based on the sport capture data of the optics which comprises the following steps: estimating the articulation central location by the sign point location, constructing the bone system which is crudity matched with the capture object, establishing bone partly coordinates on the bone system, computing the initial bone sport data by the bone partly coordinates, establishing the bone system and the virtual sign point system which is matched with the capture object, separating the bone chain on the bone system, establishing the distance function between the sincerity and the virtual sign and doing distance minimum optimization, updating the virtual sign point coordinates, obtaining the result when the distance between the virtual sign point and the real sign point is stabilized.