Journal's Facebook pageAdaptive Multiscale Sparse Unmixing for Hyperspectral Remote Sensing Image
- Xiangnan University, Chenzhou,China
{liyalan, lsl}@xnu.edu.cn - Hunan Engineering Research Center of Advanced Embedded Computing and Intelligent Medical Systems, 423099 Chenzhou, China
{liyalan, lsl}@xnu.edu.cn - Hunan Institute of Science and Technology, Yueyang, China
{812011120131-vip, gavinxie}@hnist.edu.cn - Linyi University, Linyi, China
duqian@lyu.edu.cn - Institute of Disaster Prevention, Beijing, China
yuanjing20110824@sina.com - Hubei Normal University, Huangshi, China
chenqi@hbnu.edu.cn
Abstract
Sparse unmixing of hyperspectral images aims to separate the endmembers and estimate the abundances of mixed pixels. This approach is the essential step for many applications involving hyperspectral images. The multiscale spatial sparse hyperspectral unmixing algorithm (MUA) could achieve higher accuracy than many state-of-the-art algorithms. The regularization parameters, whose combinations markedly influence the unmixing accuracy, are determined by manually searching in the broad parameter space, leading to time consuming. To settle this issue, the adaptive multi-scale spatial sparse hyperspectral unmixing algorithm (AMUA) is proposed. Firstly, the MUA model is converted into a new version by using of a maximum a posteriori (MAP) system. Secondly, the theories indicating that andnorms are equivalent to Laplacian and multivariate Gaussian functions, respectively, are applied to explore the strong connections among the regularization parameters, estimated abundances and estimated noise variances. Finally, the connections are applied to update the regularization parameters adaptively in the optimization process of unmixing. Experimental results on both simulated data and real hyperspectral images show that the AMUA can substantially improve the unmixing efficiency at the cost of negligible accuracy. And a series of sensitive experiments were undertook to verify the robustness of the AMUA algorithm.
Key words
adaptive multiscale sparse hyperspectral unmixing algorithm, loss functions, regularization parameters, maximum a posteriori.
Digital Object Identifier (DOI)
https://doi.org/10.2298/CSIS220828009L
Publication information
Volume 20, Issue 2 (April 2023)
Special Issue on Machine Learning-based Decision Support Systems in IoT systems
Year of Publication: 2023
ISSN: 2406-1018 (Online)
Publisher: ComSIS Consortium
Full text
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How to cite
Li, Y., Li, Y., Xie, W., Du, Q., Yuan, J., Lin, S., Chen, L. Q.: Adaptive Multiscale Sparse Unmixing for Hyperspectral Remote Sensing Image. Computer Science and Information Systems, Vol. 20, No. 2, 551–572. (2023), https://doi.org/10.2298/CSIS220828009L
