Kernel oblique subspace projection approach for target detection in hyperspectral imagery

  • Authors:

  • Liaoying Zhao;Yinhe Shen;Xiaorun Li

  • Affiliations:

  • Institute of Computer Application Technology, HangZhou Dianzi University, Hangzhou, China;Institute of Computer Application Technology, HangZhou Dianzi University, Hangzhou, China;College of Electrical Engineering, Zhejiang University, Hangzhou, China

  • Venue:
  • AICI'10 Proceedings of the 2010 international conference on Artificial intelligence and computational intelligence: Part I
  • Year:
  • 2010

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Abstract

In this paper, a kernel-based nonlinear version of the oblique subspace projection (OBSP) operator is defined in terms of kernel functions. Input data are implicitly mapped into a high-dimensional kernel feature space by a nonlinear mapping, which is associated with a kernel function. The OBSP expression is then derived in the feature space, which is kernelized in terms of the kernel functions in order to avoid explicit computation in the high-dimensional feature space. The resulting kernelized OBSP algorithm is equivalent to a nonlinear OBSP in the original input space. Experimental results based on simulated hyperspectral data and real hyperspectral imagery shows that the kernel oblique subspace projection (KOBSP) outperforms the conventional OBSP.