ReL-SAR: Representation Learning for Skeleton Action Recognition with Convolutional Transformers and BYOL

• URL: http://arxiv.org/abs/2409.05749v1
• Date: Mon, 9 Sep 2024 16:03:26 GMT
• Title: ReL-SAR: Representation Learning for Skeleton Action Recognition with Convolutional Transformers and BYOL
• Authors: Safwen Naimi, Wassim Bouachir, Guillaume-Alexandre Bilodeau,
• Abstract summary: Unsupervised representation learning is of prime importance to leverage unlabeled skeleton data. We design a lightweight convolutional transformer framework, named ReL-SAR, for jointly modeling spatial and temporal cues in skeleton sequences. We capitalize on Bootstrap Your Own Latent (BYOL) to learn robust representations from unlabeled skeleton sequence data.
• Score: 6.603505460200282
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: To extract robust and generalizable skeleton action recognition features, large amounts of well-curated data are typically required, which is a challenging task hindered by annotation and computation costs. Therefore, unsupervised representation learning is of prime importance to leverage unlabeled skeleton data. In this work, we investigate unsupervised representation learning for skeleton action recognition. For this purpose, we designed a lightweight convolutional transformer framework, named ReL-SAR, exploiting the complementarity of convolutional and attention layers for jointly modeling spatial and temporal cues in skeleton sequences. We also use a Selection-Permutation strategy for skeleton joints to ensure more informative descriptions from skeletal data. Finally, we capitalize on Bootstrap Your Own Latent (BYOL) to learn robust representations from unlabeled skeleton sequence data. We achieved very competitive results on limited-size datasets: MCAD, IXMAS, JHMDB, and NW-UCLA, showing the effectiveness of our proposed method against state-of-the-art methods in terms of both performance and computational efficiency. To ensure reproducibility and reusability, the source code including all implementation parameters is provided at: https://github.com/SafwenNaimi/Representation-Learning-for-Skeleton-Action-Recognition-with-Convolut ional-Transformers-and-BYOL

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