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Proceedings Paper

Wavelet analysis of a moving object trajectory
Author(s): Cuihong Qi; Hong Shu; Jun Pang; Diana Quesada Sedas
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Paper Abstract

In this paper, we make wavelet analysis of the moving object trajectory to discover some motion patterns locally and globally. Particularly, the trajectory is represented with a sequence of spatial coordinates over time. Boundary extension is made previously for meeting the mathematical preconditions of wavelet transformations. The spatial point, composed of coordinates x and y, is regarded as a function of time. After a wavelet transformation of the moving object trajectory, the wavelet coefficients of modulus maxima are selected for identifying sudden speed-changing points. Further, we make a cubic spline interpolation of pseudo-modulus maxima wavelet coefficients for reducing the error of the reconstructed motion trajectory. Some experimental results have shown that motion maintenance and trajectory generalization are achieved through wavelet analysis of the moving object trajectory.

Paper Details

Date Published: 28 October 2006
PDF: 7 pages
Proc. SPIE 6421, Geoinformatics 2006: Geospatial Information Technology, 64211F (28 October 2006); doi: 10.1117/12.713206
Show Author Affiliations
Cuihong Qi, Wuhan Univ. (China)
Hong Shu, Wuhan Univ. (China)
Jun Pang, Wuhan Univ. (China)
Diana Quesada Sedas, Swiss Federal Institute of Technology (Switzerland)

Published in SPIE Proceedings Vol. 6421:
Geoinformatics 2006: Geospatial Information Technology
Huayi Wu; Qing Zhu, Editor(s)

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