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Related Experiment Video

Updated: Jan 12, 2026

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MotionLLM: Understanding Human Behaviors from Human Motions and Videos.

Ling-Hao Chen, Shunlin Lu, Ailing Zeng

    IEEE Transactions on Pattern Analysis and Machine Intelligence
    |October 31, 2025
    PubMed
    Summary

    This study introduces MotionLLM, a framework for human behavior understanding using both video and motion data. It enhances spatial-temporal comprehension and reasoning by jointly modeling multi-modal inputs.

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    Area of Science:

    • Computer Vision
    • Artificial Intelligence
    • Human Behavior Analysis

    Background:

    • Current Large Language Models (LLMs) often focus on single modalities (video or motion) for human behavior understanding.
    • Effective human behavior analysis requires integrating information from both visual (video) and kinematic (motion) data to capture detailed body dynamics.

    Purpose of the Study:

    • To develop a novel framework, MotionLLM, for comprehensive human behavior understanding, including captioning and reasoning.
    • To propose a unified training strategy that leverages complementary data from video-text and motion-text pairs.
    • To introduce a new dataset (MoVid) and benchmark (MoVid-Bench) for evaluating multi-modality human behavior understanding.

    Main Methods:

    • Developed MotionLLM, a framework integrating video and motion data for human behavior analysis.
    • Implemented a unified video-motion training strategy using coarse video-text and fine-grained motion-text data.
    • Collected the MoVid dataset and created the MoVid-Bench for robust evaluation.

    Main Results:

    • MotionLLM demonstrates superior performance in human motion captioning.
    • The framework shows enhanced capabilities in spatial-temporal comprehension.
    • MotionLLM exhibits improved reasoning abilities in human behavior understanding tasks.

    Conclusions:

    • Jointly modeling video and motion data is crucial for nuanced human behavior understanding.
    • MotionLLM offers an effective approach for multi-modality human behavior analysis.
    • The MoVid dataset and MoVid-Bench provide valuable resources for future research.