T-MOR: Learning Motion-Aware Skeleton Representations for Human Action Recognition

• URL: http://arxiv.org/abs/2606.21607v1
• Date: Fri, 19 Jun 2026 17:09:14 GMT
• Title: T-MOR: Learning Motion-Aware Skeleton Representations for Human Action Recognition
• Abstract summary: Transferable skeleton MOtion Representation (T-MOR) is a motion-aware framework that learns transferable action representations from skeleton sequences.<n>We evaluate T-MOR on a range of human-centric action recognition benchmarks, including action classification and frame-wise temporal detection.
• Score: 19.704188623749538
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Vision-language models such as CLIP have recently achieved strong performance on a wide range of visual understanding tasks. However, most existing models rely primarily on appearance-level supervision from images or videos, and do not explicitly model human motion, which is essential for fine-grained and human-centric action recognition task as actions are defined by temporally structured and physically grounded body movements. To address this problem, we propose Transferable skeleton MOtion Representation (T-MOR), a motion-aware framework that learns transferable action representations from skeleton sequences with the aid of video and language supervision during training. T-MOR adopts a multi-modal contrastive learning scheme that aligns skeleton motion with visual and textual representations, while performing inference using only lightweight skeleton inputs. To support large-scale pre-training, we construct PoseCap-1M, a new dataset that contains over one million synchronized video, skeleton, and text triplets covering diverse human activities. We evaluate T-MOR on a range of human-centric action recognition benchmarks, including action classification and frame-wise temporal detection. Experimental results show that T-MOR consistently improves performance across multiple datasets, such as Toyota Smarthome, Penn Action, UAV-Human, TSU, and Charades. In addition, T-MOR demonstrates strong generalization ability in few-shot and zero-shot settings, highlighting the effectiveness of motion-centric and embodied representations for transferable action understanding.

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