ECGID: a human identification method based on adaptive particle swarm optimization and the bidirectional LSTM model

Yefei ZHANG; Zhidong ZHAO; Yanjun DENG; Xiaohong ZHANG; Yu ZHANG

doi:10.1631/FITEE.2000511

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ECGID: a human identification method based on adaptive particle swarm optimization and the bidirectional LSTM model

Regular Papers | Updated：2022-06-14

- ECGID: a human identification method based on adaptive particle swarm optimization and the bidirectional LSTM model
- ECGID：一种基于自适应粒子群优化算法和双向LSTM网络的个体身份识别模型
- Frontiers of Information Technology & Electronic Engineering Vol. 22, Issue 12, Pages: 1641-1654(2021)
- Affiliations：
  
  School of Electronics and Information Engineering, Hangzhou Dianzi University, Hangzhou300318, China
- Author bio：
  
  E-mail: zhangyf@hdu.edu.cn
  ‡Corresponding author
  E-mail: yanjund@hdu.edu.cn
  E-mail: xhzhang@hdu.edu.cn
  E-mail: zy2009@hdu.edu.cn
- Funds：
- DOI：10.1631/FITEE.2000511
  CLC： TN911.72
- Received：29 September 2020，
  
  Revised：2021-06-21，
  
  Accepted：31 January 2021，
  
  Published Online：02 September 2021，
  
  Published：0 December 2021
- Accepted：
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Yefei ZHANG, Zhidong ZHAO, Yanjun DENG, et al. ECGID: a human identification method based on adaptive particle swarm optimization and the bidirectional LSTM model[J]. Frontiers of Information Technology & Electronic Engineering, 2021, 22(12): 1641-1654.
DOI：

Yefei ZHANG, Zhidong ZHAO, Yanjun DENG, et al. ECGID: a human identification method based on adaptive particle swarm optimization and the bidirectional LSTM model[J]. Frontiers of Information Technology & Electronic Engineering, 2021, 22(12): 1641-1654. DOI： 10.1631/FITEE.2000511.

摘要

随着日益增长的个人隐私和安全需求，基于生理信号的生物识别技术近年受到越来越多关注。心电信号（electrocardiogram，ECG）的活体采集性和信息隐蔽性使其具有极强抗攻击性。本文针对现有深度学习算法在心电身份识别领域应用中面临的3个主要瓶颈——超参数寻优费时、识别过程缓慢且计算量大、心电采集环境复杂且不稳定，提出一种新的深度神经网络框架，集双向长短期记忆网络（BLSTM）和自适应粒子群优化算法（APSO）于一体，直接从时序信号中学习待识别个体的关键特征表示。该方法避免了超参数选择寻优效率低下且依赖于经验设定的不足，充分利用时序信号的空间信息特征和识别算法对关键特征的记忆特性。为评估算法性能，设计了两种方案模拟个体ECG采集过程中的电极放置位置和采集时间连续性。经4种LSTM网络模型和机器学习算法的实验对比分析，证实所提算法在抑制过拟合和特征自学习方面存在一定优势，训练集、验证集和测试集的平均识别率分别为97.71%、99.41%和98.89%。实验结果表明，本文所提算法具有计算量小、泛化性能高的优势，可有效应用于个体身份识别。

Abstract

Physiological signal based biometric analysis has recently attracted attention as a means of meeting increasing privacy and security requirements. The real-time nature of an electrocardiogram (ECG) and the hidden nature of the information make it highly resistant to attacks. This paper focuses on three major bottlenecks of existing deep learning driven approaches: the lengthy time requirements for optimizing the hyperparameters

the slow and computationally intense identification process

and the unstable and complicated nature of ECG acquisition. We present a novel deep neural network framework for learning human identification feature representations directly from ECG time series. The proposed framework integrates deep bidirectional long short-term memory (BLSTM) and adaptive particle swarm optimization (APSO). The overall approach not only avoids the inefficient and experience-dependent search for hyperparameters

but also fully exploits the spatial information of ordinal local features and the memory characteristics of a recognition algorithm. The effectiveness of the proposed approach is thoroughly evaluated in two ECG datasets

using two protocols

simulating the influence of electrode placement and acquisition sessions in identification. Comparing four recurrent neural network structures and four classical machine learning and deep learning algorithms

we prove the superiority of the proposed algorithm in minimizing overfitting and self-learning of time series. The experimental results demonstrated an average identification rate of 97.71%

99.41%

and 98.89% in training

validation

and test sets

respectively. Thus

this study proves that the application of APSO and LSTM techniques to biometric human identification can achieve a lower algorithm engineering effort and higher capacity for generalization.

关键词

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references

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