Domain-adaptive Fall Detection Using Deep Adversarial Training

TL;DR

This paper introduces a deep adversarial training method for fall detection that effectively transfers knowledge across different sensor positions and configurations, improving detection accuracy in new environments.

Contribution

It proposes a novel domain-adaptive fall detection approach using deep adversarial training to address cross-domain challenges in sensor-based fall detection systems.

Findings

F1-score improved by 1.5% to 7% in cross-position scenarios.

F1-score improved by 3.5% to 12% in cross-configuration scenarios.

Demonstrates effective transfer learning for fall detection across different sensor setups.

Abstract

Fall detection (FD) systems are important assistive technologies for healthcare that can detect emergency fall events and alert caregivers. However, it is not easy to obtain large-scale annotated fall events with various specifications of sensors or sensor positions during the implementation of accurate FD systems. Moreover, the knowledge obtained through machine learning has been restricted to tasks in the same domain. The mismatch between different domains might hinder the performance of FD systems. Cross-domain knowledge transfer is very beneficial for machine-learning-based FD systems to train a reliable FD model with well-labeled data in new environments. In this study, we propose domain-adaptive fall detection (DAFD) using deep adversarial training (DAT) to tackle cross-domain problems, such as cross-position and cross-configuration. The proposed DAFD can transfer knowledge from the source domain to the target domain by minimizing the domain discrepancy to avoid mismatch problems. The experimental results show that the average F1-score improvement when using DAFD ranges from 1.5% to 7% in the cross-position scenario, and from 3.5% to 12% in the cross-configuration scenario, compared to using the conventional FD model without domain adaptation training. The results demonstrate that the proposed DAFD successfully helps to deal with cross-domain problems and to achieve better detection performance.