arXiv:2502.19364cs.LG2025-02

用深度学习提升人体运动时序分析,支持动作识别与康复应用。

Deep Learning For Time Series Analysis With Application On Human Motion

  • 结合特征工程与自监督学习,提升小样本下的时序分类性能。
  • 提出基于形状的合成数据生成方法,有效缓解数据稀缺问题。
  • 构建生成模型用于影视游戏中的动作模拟,兼具实用与创新。

时间序列数据由等间隔时间点构成,在医疗、通信和能源等领域至关重要。其分析任务包括分类、聚类、原型生成与回归。分类可识别骨骼动作序列中的正常与异常运动,聚类可发现股市行为模式,原型生成用于扩展物理治疗数据集,回归则用于预测患者康复进程。深度学习因在其他领域的成功而被广泛应用于时间序列分析。本文通过特征工程、基础模型引入及紧凑高效的架构设计,提升分类性能;针对标注数据有限的问题,采用自监督学习策略。研究贡献涵盖真实应用场景,如动作识别与康复分析。提出一种人体动作数据生成模型,适用于影视与游戏制作;针对数据稀缺问题,设计基于形状的合成样本生成方法以增强回归模型表现。最后,系统评估判别与生成模型的局限性,呼吁建立更严谨的标准评估框架。在公开数据集上的实验揭示新见解与方法,推动时间序列分析的实际应用进展。

原文摘要 · Abstract (English)

Time series data, defined by equally spaced points over time, is essential in fields like medicine, telecommunications, and energy. Analyzing it involves tasks such as classification, clustering, prototyping, and regression. Classification identifies normal vs. abnormal movements in skeleton-based motion sequences, clustering detects stock market behavior patterns, prototyping expands physical therapy datasets, and regression predicts patient recovery. Deep learning has recently gained traction in time series analysis due to its success in other domains. This thesis leverages deep learning to enhance classification with feature engineering, introduce foundation models, and develop a compact yet state-of-the-art architecture. We also address limited labeled data with self-supervised learning. Our contributions apply to real-world tasks, including human motion analysis for action recognition and rehabilitation. We introduce a generative model for human motion data, valuable for cinematic production and gaming. For prototyping, we propose a shape-based synthetic sample generation method to support regression models when data is scarce. Lastly, we critically evaluate discriminative and generative models, identifying limitations in current methodologies and advocating for a robust, standardized evaluation framework. Our experiments on public datasets provide novel insights and methodologies, advancing time series analysis with practical applications.

时序分析人体动作生成模型小样本

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