垒球绕环式投球动作缺失数据修复方法研究

Softball Round Ring Throwing Motion Missing Data Repair Methods

当前数据修复方法依据垒球运动学关系,构建模型对垒球绕环式投球动作缺失数据进行修复,需要收集大量的骨骼信息先验知识。提出一种基于稀疏表示的垒球绕环式投球动作缺失数据修复方法,将动作捕获设备贴在垒球运动员关节和末端处,以一定的频率对动作数据进行采集,通过重构获取标记点在三维空间中的位置,以ASF&AMC的数据格式对垒球绕环式投球动作数据进行存储,给出垒球绕环式投球动作数据捕获过程。针对某一含有缺失标记的垒球绕环式投球动作帧,求出该帧中未缺失部分在由完整帧构成的字典上的稀疏表示系数,通过该稀疏表示系数与字典对动作帧中的缺失数据进行修复。实验结果表明,所提方法具有很高的修复精度。

Repair methods based on the current data softball kinematics relationship, build the model of circle ring type pitch movement softball missing data repair, a large number of skeleton information prior knowledge was need to collect. A circle ring type pitch movement based on sparse representation of softball missing data repair methods, motion capture device on the softball athlete, joints and terminal, at a certain frequency of data collection, through refactoring position in three dimensional space, marked points in the data format of ASF＆AMC softball round ring throwing motion data for storage, given softball round ring throwing motion data capture process were got. For a softball containing missing tags around the ring throwing motion frame, and not missing parts in the frame on the composed of full frame dictionary sparse representation of the coefficient of frame by the movements of the coefficient of the sparse representation and dictionary to repair the missing data in. The experimental results show that the proposed method has high precision of repair.