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PTrack: Enhancing the Applicability of Pedestrian Tracking with - PowerPoint PPT Presentation

Mar 03, 2024 •196 likes •376 views

PTrack: Enhancing the Applicability of Pedestrian Tracking with Wearables Yonghang Jiang, Zhenjiang Li, Jianping Wang Department of Computer Science City University of Hong Kong 6 Insurance companies Customer assessment Sedentary: 21 hours

  1. PTrack: Enhancing the Applicability of Pedestrian Tracking with Wearables Yonghang Jiang, Zhenjiang Li, Jianping Wang Department of Computer Science City University of Hong Kong

  2. 6 Insurance companies Customer assessment Sedentary: 21 hours Active: 3 hours

  3. Indoor navigation 124 shopping centers in HK (wikipedia) Huge market!!!

  4. Performance?

  5. 10,000+ steps in 1 hour

  6. Limitations • A rm’s motions  Inaccurate step counter • Joint motion  Inaccurate stride length estimation

  7. Challenges • Identify interference activities. • Extract pure body’s motion. • User-specific profile self-training.

  8. Rigid object Synchronized Matched Two motions Concurrent Not synchronized Offsets

  9. Stride Estimation Extract body bounce b Existing model

  10. Profile Self-Training Arm & leg lengths Search parameters Statistic property

  11. Collaborate with existing works

  12. Overall Accuracy 98% 98% 93%

  13. Robustness

  14. Stride Performance Average error: 5cm

  15. Real Case Study G.truth: 141.5m PTrack: 136.4m

  16. Thanks!

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