Dimensionality reduction method based on a tensor model

Ronghua Yan; Jinye Peng; Dongmei Ma; Desheng Wen

doi:10.1117/1.JRS.11.025011

31 May 2017 Dimensionality reduction method based on a tensor model

Ronghua Yan, Jinye Peng, Dongmei Ma, Desheng Wen

Author Affiliations +

Journal of Applied Remote Sensing, Vol. 11, Issue 2, 025011 (May 2017). https://doi.org/10.1117/1.JRS.11.025011

Abstract

Dimensionality reduction is a preprocessing step for hyperspectral image (HSI) classification. Principal component analysis reduces the spectral dimension and does not utilize the spatial information of an HSI. Both spatial and spectral information are used when an HSI is modeled as a tensor, that is, the noise in the spatial dimension is decreased and the dimension in a spectral dimension is reduced simultaneously. However, this model does not consider factors affecting the spectral signatures of ground objects. This means that further improving classification is very difficult. The authors propose that the spectral signatures of ground objects are the composite result of multiple factors, such as illumination, mixture, atmospheric scattering and radiation, and so on. In addition, these factors are very difficult to distinguish. Therefore, these factors are synthesized as within-class factors. Within-class factors, class factors, and pixels are selected to model a third-order tensor. Experimental results indicate that the classification accuracy of the new method is higher than that of the previous methods.

Citation Download Citation

Ronghua Yan, Jinye Peng, Dongmei Ma, and Desheng Wen "Dimensionality reduction method based on a tensor model," Journal of Applied Remote Sensing 11(2), 025011 (31 May 2017). https://doi.org/10.1117/1.JRS.11.025011

Received: 17 November 2016; Accepted: 5 May 2017; Published: 31 May 2017

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