Adaptive Law-Based Transformation (ALT): A Lightweight Feature Representation for Time Series Classification
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arXiv
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| Format: | Preprint |
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2025
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| author | Kurbucz, Marcell T. Hajós, Balázs Halmos, Balázs P. Molnár, Vince Á. Jakovác, Antal |
| author_facet | Kurbucz, Marcell T. Hajós, Balázs Halmos, Balázs P. Molnár, Vince Á. Jakovác, Antal |
| contents | Time series classification (TSC) is fundamental in numerous domains, including finance, healthcare, and environmental monitoring. However, traditional TSC methods often struggle with the inherent complexity and variability of time series data. Building on our previous work with the linear law-based transformation (LLT) - which improved classification accuracy by transforming the feature space based on key data patterns - we introduce adaptive law-based transformation (ALT). ALT enhances LLT by incorporating variable-length shifted time windows, enabling it to capture distinguishing patterns of various lengths and thereby handle complex time series more effectively. By mapping features into a linearly separable space, ALT provides a fast, robust, and transparent solution that achieves state-of-the-art performance with only a few hyperparameters. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_09217 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Adaptive Law-Based Transformation (ALT): A Lightweight Feature Representation for Time Series Classification Kurbucz, Marcell T. Hajós, Balázs Halmos, Balázs P. Molnár, Vince Á. Jakovác, Antal Machine Learning Artificial Intelligence Computer Vision and Pattern Recognition 62H30, 68T10, 62M10 I.5; I.2.0; G.3 Time series classification (TSC) is fundamental in numerous domains, including finance, healthcare, and environmental monitoring. However, traditional TSC methods often struggle with the inherent complexity and variability of time series data. Building on our previous work with the linear law-based transformation (LLT) - which improved classification accuracy by transforming the feature space based on key data patterns - we introduce adaptive law-based transformation (ALT). ALT enhances LLT by incorporating variable-length shifted time windows, enabling it to capture distinguishing patterns of various lengths and thereby handle complex time series more effectively. By mapping features into a linearly separable space, ALT provides a fast, robust, and transparent solution that achieves state-of-the-art performance with only a few hyperparameters. |
| title | Adaptive Law-Based Transformation (ALT): A Lightweight Feature Representation for Time Series Classification |
| topic | Machine Learning Artificial Intelligence Computer Vision and Pattern Recognition 62H30, 68T10, 62M10 I.5; I.2.0; G.3 |
| url | https://arxiv.org/abs/2501.09217 |