基于LCSS算法的膝、踝关节相似性特征研究  

Study on Similarity Characteristics of Knee and Ankle Joints Based on LCSS Algorithm

作　　者：刘旭 尹雨晴 赵雪冬 代雪晶[1] 汤澄清[1] Liu Xu;Yin Yuqing;Zhao Xuedong;Dai Xuejing;Tang Chengqing(Criminal Investigation Police University of China,Shenyang 110000,China)

机构地区：[1]中国刑事警察学院,沈阳110000

出　　处：《机电工程技术》2022年第9期72-75,共4页Mechanical & Electrical Engineering Technology

基　　金：中国刑事警察学院2021年度研究生创新能力提升项目(编号:2021YCYB45);公安部科技强警基础工作专项项目(编号:2016GABJC06)。

摘　　要：当前步态识别技术在侦查领域为侦查人员打开了全新的破案思路。步态识别技术正是基于人体正常行走过程中各个关节角度呈现周期性变化且稳定,从而为步态特征识别人身提供了可能性。使用Codamotion三维动作分析系统对人体膝关节、踝关节的数据完成采集,完成原始数据归一化处理,在此基础上提出了基于最长公共子序列(LCSS)算法实现人体膝关节角度、踝关节角度的运动曲线相似度评估。对数据的统计分析表明,自然行走时同一人膝关节相似度与踝关节相似度分别在(79.47%+18.03%)、(75.34%+19.71%)即为高度符合。对不同人膝、踝关节角度交叉比较时使用最近邻平均相似度进行分析,膝关节与踝关节相似度分别小于20.52%、22.5%即存在较大差异。研究结果表明,同一人行走时膝、踝关节角度特征具有稳定性,不同人之间存在较大的差异性。The current gait recognition technology has opened up a new way of thinking for investigators to solve cases in the field of investigation.Gait recognition technology is based on the normal walking process of the human body during the various joint angles to show periodic changes and stability,thus providing the possibility of gait characteristics to identify the human body.The data of human knee joint and ankle joint were collected by codamotion three-dimensional motion analysis system,and the original data was normalized,and on the basis,the similarity evaluation of the motion curve of human knee angle and ankle angle based on the longest common sub-sequence(LCSS)algorithm was proposed.According to the statistical analysis of the data,the similarity between the knee joint and the ankle joint of the same person during natural walking is highly consistent at(79.47%+18.03%)and(75.34%+19.71%),respectively.When comparing the knee and ankle angles of different people,the average similarity of the nearest neighbor was used to analyze,and the similarity between the knee joint and the ankle joint was less than 20.52%and 22.5%,respectively.The results show that the angular characteristics of the knee and ankle joints are stable when the same person walks,and there are great differences between different people.

关 键 词：相似度 LCSS算法 膝关节 踝关节 

分 类 号：TP312[自动化与计算机技术—计算机软件与理论]