Continual Egocentric Activity Recognition With Foreseeable-Generalized Visual–IMU Representations
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Abstract
The rapid advancement of wearable sensors has significantly facilitated data collection in our daily lives. Human activity recognition (HAR), a prominent research area in wearable technology, has made substantial progress in recent years. However, the existing efforts often overlook the issue of functional scalability in models, making it challenging for deep models to adapt to application scenarios that require continuous evolution. Furthermore, when employing conventional continual learning techniques, we have observed an imbalance between visual-based and inertial-measurement-unit (IMU) sensing modalities during joint optimization, which hampers model generalization and poses a significant challenge. To obtain a generalized representation more adapted to continual tasks, we propose a motivational optimization scheme to address the limited generalization caused by the modal imbalance, enabling foreseeable generalization in a visual–IMU multimodal network. To prevent the forgetting of previously learned activities, we introduce a robust representation estimation technique and a pseudo representation (PR) generation strategy for continual learning. Experimental results on the egocentric activity dataset UESTC-MMEA-CL demonstrate the effectiveness of our proposed method. Furthermore, our method effectively leverages the generalization capabilities of IMU-based modal representations, outperforming state-of-the-art methods in various task settings.
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- Authors
- He, C., Cheng, S., Qiu, Z., Xu, L., Meng, F., Wu, Q., & Li, H.
- Affiliations
- University of Electronic Science and Technology of China (CN)
- Venue
- IEEE Sensors Journal
- Published
- 2024-04-15
- Volume
- 24
- Issue
- 8
- Pages
- 12934-12945
- ISSN
- 1530-437X (ISSN-L)
- 1558-1748
- 2379-9153
- OpenAlex
- W4392567293
- Cited by
- 11
- References
- 68
- Citations by year
- 2026: 4 · 2025: 5 · 2024: 2
- FWCI
- 1.54
- Type
- journal article
- Language
- en
- Open access
- green
- doi.org
- Licence
- Locations
- IEEE Sensors Journal (publishedVersion)
- Figshare (submittedVersion, cc-by-nc-sa)
- Funders
- National Science and Technology Major Project (2021ZD0112001)
- National Natural Science Foundation of China (62071086, 62271119)
- Independent Research Project of Civil Aviation Flight Technology and Flight Safety Key Laboratory (FZ2022ZZ06)
- Topics
- Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Context-Aware Activity Recognition Systems
- Physical Sciences › Computer Science › Artificial Intelligence › Domain Adaptation and Few-Shot Learning
- Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Human Pose and Action Recognition
- Keywords
- continual learning, human activity recognition, wearable sensors
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