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Separable-spectral convolution and inception network for hyperspectral image super-resolution

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Abstract

Due to the limitation of the imaging system, it is hard to get Hyperspectral Image (HSI) with very high spatial resolution. Super-Resolution (SR) is a handling missing data technology to restore high-frequency information from the low-resolution image, can be used to solve this problem. Recently, Deep Learning (DL) has achieved great performance in computer vision, including SR. However, most DL-based HSI SR methods neglect the spectral disorder caused by normal 2D convolution. This paper proposes a novel end–end deep learning-based network named Separable-Spectral and Inception Network (SSIN) for HSI SR. In SSIN, the feature extraction module independently extracts features of each band image, and then these features are fused together to further exploit residual image by using feature fusion module. In reconstruction module, a multi-path connection is built to obtain features of different levels to restore high spatial resolution image in a coarse-to-fine manner. Experiments are implemented on two datasets include both indoor and airborne HSIs, and the performances of SSIN are evaluated in different conditions. Experimental results show that adding several separable spectral convolutions and multi-path connection in a deep network can greatly improve the SR performance, and SSIN achieves higher accuracy and better visualization compare with other methods.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China under Grant No. 91638201, No. 61501017, and No. 41722108.

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Authors and Affiliations

  1. College of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, China

    Ke Zheng & Ximin Cui

  2. Key Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, 100094, China

    Ke Zheng, Lianru Gao & Bing Zhang

  3. College of Computer Science and Software Engineering, Computer Vision Research Institute, Shenzhen University, Shenzhen, 518060, China

    Lianru Gao & Sen Jia

  4. College of Information Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, China

    Qiong Ran

  5. University of Chinese Academy of Sciences, Beijing, 100049, China

    Bing Zhang

  6. Department Telecommunications and Information Processing, Ghent University, 9000, Ghent, Belgium

    Wenzhi Liao

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  1. Ke Zheng
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Correspondence to Lianru Gao.

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Zheng, K., Gao, L., Ran, Q. et al. Separable-spectral convolution and inception network for hyperspectral image super-resolution. Int. J. Mach. Learn. & Cyber. 10, 2593–2607 (2019). https://doi.org/10.1007/s13042-018-00911-4

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