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Front. Inform. Technol. Electron. Eng.  2011, Vol. 12 Issue (7): 542-549    DOI: 10.1631/jzus.C1000304
    
Clustering-based hyperspectral band selection using sparse nonnegative matrix factorization
Ji-ming Li*,1,2, Yun-tao Qian1
1 School of Computer Science and Technology, Zhejiang University, Hangzhou 310027, China 2 Zhejiang Police College, Hangzhou 310053, China
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Abstract  Hyperspectral imagery generally contains a very large amount of data due to hundreds of spectral bands. Band selection is often applied firstly to reduce computational cost and facilitate subsequent tasks such as land-cover classification and higher level image analysis. In this paper, we propose a new band selection algorithm using sparse nonnegative matrix factorization (sparse NMF). Though acting as a clustering method for band selection, sparse NMF need not consider the distance metric between different spectral bands, which is often the key step for most common clustering-based band selection methods. By imposing sparsity on the coefficient matrix, the bands’ clustering assignments can be easily indicated through the largest entry in each column of the matrix. Experimental results showed that sparse NMF provides considerable insight into the clustering-based band selection problem and the selected bands are good for land-cover classification.

Key wordsHyperspectral      Band selection      Clustering      Sparse nonnegative matrix factorization     
Received: 30 August 2010      Published: 04 July 2011
CLC:  TP75  
Cite this article:

Ji-ming Li, Yun-tao Qian. Clustering-based hyperspectral band selection using sparse nonnegative matrix factorization. Front. Inform. Technol. Electron. Eng., 2011, 12(7): 542-549.

URL:

http://www.zjujournals.com/xueshu/fitee/10.1631/jzus.C1000304     OR     http://www.zjujournals.com/xueshu/fitee/Y2011/V12/I7/542


Clustering-based hyperspectral band selection using sparse nonnegative matrix factorization

Hyperspectral imagery generally contains a very large amount of data due to hundreds of spectral bands. Band selection is often applied firstly to reduce computational cost and facilitate subsequent tasks such as land-cover classification and higher level image analysis. In this paper, we propose a new band selection algorithm using sparse nonnegative matrix factorization (sparse NMF). Though acting as a clustering method for band selection, sparse NMF need not consider the distance metric between different spectral bands, which is often the key step for most common clustering-based band selection methods. By imposing sparsity on the coefficient matrix, the bands’ clustering assignments can be easily indicated through the largest entry in each column of the matrix. Experimental results showed that sparse NMF provides considerable insight into the clustering-based band selection problem and the selected bands are good for land-cover classification.

关键词: Hyperspectral,  Band selection,  Clustering,  Sparse nonnegative matrix factorization 
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