Cited by 4Data Management and AlgorithmsTime Series Analysis and ForecastingData Mining Algorithms and Applications

Fréchet Kernel for Trajectory Data Analysis

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Takeuchi, Koh, Imaizumi, Masaaki, Kanda, Shunsuke, Tabei, Yasuo, Fujii, Keisuke, Yoda, Ken, Ishihata, Masakazu, Maekawa, Takuya·2021·Proceedings of the 29th International Conference on Advances in Geographic Information Systems

Abstract

Trajectory analysis has been a central problem in applications of location tracking systems. Recently, the (discrete) Fréchet distance becomes a popular approach for measuring the similarity of two trajectories because of its high feature extraction capability. Despite its importance, the Fréchet distance has several limitations: (i) sensitive to noise as a trade-off for its high feature extraction capability; and (ii) it cannot be incorporated into machine learning frameworks due to its non-smooth functions. To address these problems, we propose the Fréchet kernel (FRK), which is associated with a smoothed Fréchet distance using a combination of two approximation techniques. FRK can adaptively acquire appropriate extraction capability from trajectories while retaining robustness to noise. Theoretically, we find that FRK has a positive definite property, hence FRK can be incorporated into the kernel method. We also provide an efficient algorithm to calculate FRK. Experimentally, FRK outperforms other methods, including other kernel methods and neural networks, in various noisy real-data classification tasks.

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Authors
Takeuchi, K., Imaizumi, M., Kanda, S., Tabei, Y., Fujii, K., Yoda, K., Ishihata, M., & Maekawa, T.
Affiliations
  • Kyoto University (JP)
  • The University of Tokyo (JP)
  • RIKEN Center for Advanced Intelligence Project (JP)
  • Nagoya University (JP)
  • NTT (Japan) (JP)
  • The University of Osaka (JP)
Venue
Proceedings of the 29th International Conference on Advances in Geographic Information Systems
Publisher
ACM
Published
2021-11-02
Pages
221-224
OpenAlex
W3214289837
Cited by
4
References
33
Citations by year
2025: 2 · 2023: 2
FWCI
0.30
Type
conference paper
Language
en
Open access
Locations
ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems (SIGSPATIAL GIS) (publishedVersion, cc-by)
Funders
Japan Society for the Promotion of Science (21H05293, 20H04075, 21K11780, 21H05300)
Topics
  • Physical Sciences › Computer Science › Signal Processing › Data Management and Algorithms
  • Physical Sciences › Computer Science › Signal Processing › Time Series Analysis and Forecasting
  • Physical Sciences › Computer Science › Information Systems › Data Mining Algorithms and Applications
Keywords
Fréchet kernels, Fréchet distance, trajectory analysis, trajectory similarity, location tracking, positive definite kernels, kernel methods, noise robustness, trajectory classification

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