Abstract
In order to solve the high dimensionality and high spectral correlation problems of hyperspectral remote sensing images (HRSIs), a new feature extraction method, named weighted classwise non-locality preserving projection (WCNLPP), is proposed. WCNLPP introduces uncorrelation coefficient to express the dissimilarity degree between the samples of different classes and constructs a non-nearest neighbor graph, such that the non-locality manifold structure of the samples is preserved after feature extraction. Firstly, principal component analysis (PCA) is used to reduce dimensionality and remove the spectral correlation of HRSIs; then, WCNLPP is utilized to guide the procedure of feature extraction after PCA; finally, minimum distance (MD) classifier and discriminant analysis (DA) classifier are used to perform terrain classification in the final feature subspace. The experimental results based on two real HRSIs show that, comparing with PCA, linear discriminant analysis (LDA) and classwise non-locality preserving projection (CNLPP) methods, the presented WCNLPP method can improve the terrain recognition accuracy.
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Acknowledgements
This work was supported in part by the National Natural Science Foundation of China (No. 61672405), the Natural Science Foundation of Shaanxi Province of China (No. 2018JM4018), the Fundamental Research Funds for the Central Universities (No. JB170204).
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Liu, J., Li, Tt., Zhang, T., Liu, Y. (2020). Hyperspectral Remote Sensing Images Feature Extraction Based on Weighted Classwise Non-locality Preserving Projection. In: Liu, Y., Wang, L., Zhao, L., Yu, Z. (eds) Advances in Natural Computation, Fuzzy Systems and Knowledge Discovery. ICNC-FSKD 2019. Advances in Intelligent Systems and Computing, vol 1075. Springer, Cham. https://doi.org/10.1007/978-3-030-32591-6_22
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DOI: https://doi.org/10.1007/978-3-030-32591-6_22
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