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

Abstract

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.

Description

technical field [0001] The present invention mainly relates to a bone motion extraction method of motion capture data, in particular to a bone motion extraction method based on optical motion capture data. Background technique [0002] Motion capture technology is a technology that can directly capture the actions of moving objects, represent these actions with numbers, and use a computer to process the resulting motion data. For information about motion capture technology, please refer to reference 1. The Chinese patent title is "Method for Acquiring Motion Capture Data", and the patent application number is [00803619.5]. To record the movements of real people or animals, there are four typical types of motion capture devices: acoustic, optical, electromagnetic, and mechanical; among them, optical motion capture devices have the widest practical range and the highest precision. [0003] Optical motion capture data refers to the motion data captured by optical capture equip...

AI Technical Summary

Problems solved by technology

[0005] At present, the methods used to realize the skeletal motion extraction program based on optical motion capture data are basically aimed at the corresponding marker point sticking method, and the position of the sticking point is required to be very accurate. When the position of the marker point sticking is slightly offset Can not get the correct result; on the other hand, in the process of processing, a joint angle solution technique called inverse kinematics is used, which artificially restricts the flexibility of some joints, so that they can only go around one Or two axis rotation, but in fact these joints rotate around three axes, so the bone motion extracted by these bone motion extraction programs can only approximately reflect the captured motion rather than accurately represent the captured motion

[0006] In addition, when computer human motion simulation is applied to sports or military motion simulation, the fidelity requirements of human motion are much higher than that of general human motion simulation, and the captured motion must be reproduced as accurately as possible, while the current optical-based motion capture The method used by the skeletal motion extraction program of the data cannot meet this requirement

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