Activity Recognition and Anomaly Detection in E-Health Applications Using Color-Coded Representation and Lightweight CNN Architectures

Hakan Yekta Yatbaz, Enver Ever, Adnan Yazici

Research output: Contribution to journalArticlepeer-review

Abstract

E-Health is becoming a vital industry and human activity recognition (HAR) is one of the most popular research areas of its scope. Although there are various studies on HAR, most of them come up with complex models that are not compatible with portable and wearable devices due to their limited computing capabilities. In this study, a new approach to data representation is presented with convolutional neural network architectures for high accuracy and lightweight activity detection. An anomaly detection framework is presented, which uses ECG data for the prediction of cardiac stress activities. The novel approach to data representation and the proposed deep learning model are tested on the MHEALTH dataset with two different validation techniques for accuracy and three different complexity metrics. The experimental results show that the proposed approaches can achieve up to 96.92% and 97.06% accuracy for the HAR and cardiac stress level, respectively. In addition, the models proposed for inertial data and ECG-based prediction are lighter than the existing approaches in the literature with sizes of 0.89 MB and 1.97 MB and complexities of 0.06 and 1.04 Giga FLOPS, respectively.

Original languageEnglish
Article number9360822
Pages (from-to)14191-14202
Number of pages12
JournalIEEE Sensors Journal
Volume21
Issue number13
DOIs
Publication statusAccepted/In press - 2021

Keywords

  • Anomaly detection
  • color-coded representation
  • Computational modeling
  • Computer architecture
  • Data models
  • E-Health
  • Electrocardiography
  • human activity recognition
  • lightweight CNN
  • Sensor data
  • Sensors
  • Wearable computers

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering

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