Acta Geodaetica et Cartographica Sinica >

2015 , Vol. 44 >Issue 7: 775 - 781

DOI: https://doi.org/10.11947/j.AGCS.2015.20140207

Hyperspectral Image Classification Based on the Combination of Spatial-spectral Feature and Sparse Representation

  • YANG Zhaoxia ,
  • ZOU Zhengrong ,
  • TAO Chao ,
  • TIAN Yanping ,
  • HE Xiaofei
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  • School of Geosciences and Info-Physics, Central South University, Changsha 410083, China

Received date: 2014-04-23

  Revised date: 2014-10-28

  Online published: 2015-07-28

Supported by

The National Basic Research Program of China(973 Program)(No.2012CB719903);The National Natural Science Foundation of China(No.41301453);The China Postdoctoral Science Foundation(No.2013M530361);Research Fund for the Doctoral Program of Higher Education(No.20130162120027)

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Abstract

In order to avoid the problem of being over-dependent on high-dimensional spectral feature in the traditional hyperspectral image classification, a novel approach based on the combination of spatial-spectral feature and sparse representation is proposed in this paper. Firstly, we extract the spatial-spectral feature by reorganizing the local image patch with the first d principal components(PCs) into a vector representation, followed by a sorting scheme to make the vector invariant to local image rotation. Secondly, we learn the dictionary through a supervised method, and use it to code the features from test samples afterwards. Finally, we embed the resulting sparse feature coding into the support vector machine(SVM) for hyperspectral image classification. Experiments using three hyperspectral data show that the proposed method can effectively improve the classification accuracy comparing with traditional classification methods.

Key words： hyperspectral image; minimum noise fraction; spatial-spectral feature; dictionary learning; sparse representation

Cite this article

YANG Zhaoxia , ZOU Zhengrong , TAO Chao , TIAN Yanping , HE Xiaofei . Hyperspectral Image Classification Based on the Combination of Spatial-spectral Feature and Sparse Representation[J]. Acta Geodaetica et Cartographica Sinica, 2015 , 44(7) : 775 -781 . DOI: 10.11947/j.AGCS.2015.20140207

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