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A new approach based on orthogonal bases of data space to decomposition of mixed pixels for hyperspectral imagery

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Abstract

A new algorithm for decomposition of mixed pixels based on orthogonal bases of data space is proposed in this paper. It is a simplex-based method which extracts endmembers sequentially using computations of largest simplex volumes. At each searching step of this extraction algorithm, searching for the simplex with the largest volume is equivalent to searching for a new orthogonal basis which has the largest norm. The new endmember corresponds to the new basis with the largest norm. This algorithm runs very fast and can also avoid the dilemma in traditional simplex-based endmember extraction algorithms, such as N-FINDR, that it generally produces different sets of final endmembers if different initial conditions are used. Moreover, with this set of orthogonal bases, the proposed algorithm can also determine the proper number of endmembers and finish the unmixing of the original images which the traditional simplex-based algorithms cannot do by themselves. Experimental results of both artificial simulated images and practical remote sensing images demonstrate the algorithm proposed in this paper is a fast and accurate algorithm for the decomposition of mixed pixels.

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Authors and Affiliations

  1. Department of Electronics Engineering, Fudan University, Shanghai, 200433, China

    XueTao Tao, Bin Wang & LiMing Zhang

  2. Key Laboratory of Wave Scattering and Remote Sensing Information (Ministry of Education), Fudan University, Shanghai, 200433, China

    Bin Wang

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  1. XueTao Tao
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  2. Bin Wang
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  3. LiMing Zhang
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Correspondence to Bin Wang.

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Tao, X., Wang, B. & Zhang, L. A new approach based on orthogonal bases of data space to decomposition of mixed pixels for hyperspectral imagery. Sci. China Ser. F-Inf. Sci. 52, 843–857 (2009). https://doi.org/10.1007/s11432-009-0017-9

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  • DOI: https://doi.org/10.1007/s11432-009-0017-9

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