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

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Mar 03, 2024 196 likes •380 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

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PTrack: Enhancing the Applicability of Pedestrian Tracking with Wearables

Yonghang Jiang, Zhenjiang Li, Jianping Wang Department of Computer Science City University of Hong Kong

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6 Insurance

companies Sedentary: 21 hours Active: 3 hours Customer assessment

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124 shopping centers in HK (wikipedia) Indoor navigation

Huge market!!!

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Performance?

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10,000+ steps in 1 hour

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Limitations

Arm’s motions  Inaccurate

step counter

Joint motion  Inaccurate

stride length estimation

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Challenges

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

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Rigid object Synchronized

Matched

Two motions Concurrent Not synchronized

Offsets

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Stride Estimation

Existing model Extract body bounce b

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Profile Self-Training

Arm & leg lengths

Statistic property Search parameters

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Collaborate with existing works

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Overall Accuracy

98% 98% 93%

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Robustness

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Stride Performance

Average error: 5cm

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Real Case Study

PTrack: 136.4m G.truth: 141.5m

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