Journal
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
Volume 16, Issue 12, Pages 1874-1878Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LGRS.2019.2913884
Keywords
Hyperspectral image (HSI) classification; kernel ridge regression (KRR); ridge linear regression (RLR); shared subspace learning (SL)
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Funding
- National Natural Science Foundation of China [616011351, 61571145]
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We propose the kernel version of the recently introduced spectral-spatial shared linear regression (SSSLR) for hyperspectral image (HSI) classification. Original SSSLR used original data space-based shared subspace learning (SL) model and spectral-spatial-based ridge linear regression (RLR) to learn a subspace projection matrix. However, HSI data sets have multivariate attributes and are often linearly inseparable, thereby limiting the classification performance of the conventional SSSLR. Hence, we introduce a modified kernel version of SSSLR algorithm [spectral-spatial shared kernel ridge regression (SSSKRR)] in which nonlinear high-dimensional feature space-based shared SL model is included into the kernel ridge regression (KRR). Finally, an efficient singular value decomposition (SVD)-based alternating iterative algorithm is used to obtain the optimal classification results. Experiments results show that the proposed SSSKRR had superior classification performance compared to the state-of-the-art SL algorithms.
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