Sensors 2013, 13(7), 8534-8550; doi:10.3390/s130708534
Article

Seismic Target Classification Using a Wavelet Packet Manifold in Unattended Ground Sensors Systems

1,2,3,* email, 1,2,3email, 1,2,3email, 1,2email, 1,2email and 1,2email
1 Science and Technology on Micro-System Laboratory, Shanghai 200050, China 2 Shanghai Institute of Microsystems and Information Technology, Chinese Academy of Sciences (CAS), Shanghai 200050, China 3 University of Chinese Academy of Sciences, Beijing 100049, China
* Author to whom correspondence should be addressed.
Received: 3 June 2013; in revised form: 23 June 2013 / Accepted: 27 June 2013 / Published: 4 July 2013
(This article belongs to the Section Physical Sensors)
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Abstract: One of the most challenging problems in target classification is the extraction of a robust feature, which can effectively represent a specific type of targets. The use of seismic signals in unattended ground sensor (UGS) systems makes this problem more complicated, because the seismic target signal is non-stationary, geology-dependent and with high-dimensional feature space. This paper proposes a new feature extraction algorithm, called wavelet packet manifold (WPM), by addressing the neighborhood preserving embedding (NPE) algorithm of manifold learning on the wavelet packet node energy (WPNE) of seismic signals. By combining non-stationary information and low-dimensional manifold information, WPM provides a more robust representation for seismic target classification. By using a K nearest neighbors classifier on the WPM signature, the algorithm of wavelet packet manifold classification (WPMC) is proposed. Experimental results show that the proposed WPMC can not only reduce feature dimensionality, but also improve the classification accuracy up to 95.03%. Moreover, compared with state-of-the-art methods, WPMC is more suitable for UGS in terms of recognition ratio and computational complexity.
Keywords: wavelet packet transform; manifold learning; seismic signal; feature extraction; target classification

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MDPI and ACS Style

Huang, J.; Zhou, Q.; Zhang, X.; Song, E.; Li, B.; Yuan, X. Seismic Target Classification Using a Wavelet Packet Manifold in Unattended Ground Sensors Systems. Sensors 2013, 13, 8534-8550.

AMA Style

Huang J, Zhou Q, Zhang X, Song E, Li B, Yuan X. Seismic Target Classification Using a Wavelet Packet Manifold in Unattended Ground Sensors Systems. Sensors. 2013; 13(7):8534-8550.

Chicago/Turabian Style

Huang, Jingchang; Zhou, Qianwei; Zhang, Xin; Song, Enliang; Li, Baoqing; Yuan, Xiaobing. 2013. "Seismic Target Classification Using a Wavelet Packet Manifold in Unattended Ground Sensors Systems." Sensors 13, no. 7: 8534-8550.

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