Efficient Superpixel-Level Multitask Joint Sparse Representation for Hyperspectral Image Classification
In this paper, we propose a superpixel-level sparse representation classification framework with multitask learning for hyperspectral imagery. The proposed algorithm exploits the class-level sparsity prior for multiple-feature fusion, and the correlation and distinctiveness of pixels in a spatial lo...
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| Veröffentlicht in: | IEEE transactions on geoscience and remote sensing 2015-10, Vol.53 (10), p.5338-5351 |
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| container_title | IEEE transactions on geoscience and remote sensing |
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| creator | Jiayi Li Hongyan Zhang Liangpei Zhang |
| description | In this paper, we propose a superpixel-level sparse representation classification framework with multitask learning for hyperspectral imagery. The proposed algorithm exploits the class-level sparsity prior for multiple-feature fusion, and the correlation and distinctiveness of pixels in a spatial local region. Compared with some of the state-of-the-art hyperspectral classifiers, the superiority of the multiple-feature combination, the spatial prior utilization, and the computational complexity are maintained at the same time in the proposed method. The proposed classification algorithm was tested on three hyperspectral images. The experimental results suggest that the proposed algorithm performs better than the other sparse (collaborative) representation-based algorithms and some popular hyperspectral multiple-feature classifiers. |
| doi_str_mv | 10.1109/TGRS.2015.2421638 |
| format | Article |
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| ispartof | IEEE transactions on geoscience and remote sensing, 2015-10, Vol.53 (10), p.5338-5351 |
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| subjects | Classification Collaboration Dictionaries Feature extraction hyperspectral imagery Hyperspectral imaging Joints multitask learning sparse representation Training |
| title | Efficient Superpixel-Level Multitask Joint Sparse Representation for Hyperspectral Image Classification |
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