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• W2924185635 abstract "Spectral unmixing (SU) is a technique to characterize mixed pixels in hyperspectral images measured by remote sensors. Most of the spectral unmixing algorithms are developed using the linear mixing models. To estimate endmembers and fractional abundance matrices in a blind problem, nonnegative matrix factorization (NMF) and its developments are widely used in the SU problem. One of the constraints which was added to NMF is sparsity, that was regularized by L q norm. In this paper, a new algorithm based on distributed optimization is suggested for spectral unmixing. In the proposed algorithm, a network including single-node clusters is employed. Each pixel in the hyperspectral images is considered as a node in this network. The sparsity-constrained distributed unmixing is optimized with diffusion least mean p-power (LMP) strategy, and then the update equations for fractional abundance and signature matrices are obtained. Afterward, the proposed algorithm is analyzed for different values of LMP power and L q norms. Simulation results based on defined performance metrics illustrate the advantage of the proposed algorithm in spectral unmixing of hyperspectral data compared with other methods." @default.
• W2924185635 created "2019-04-01" @default.
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• W2924185635 date "2019-04-01" @default.
• W2924185635 modified "2023-09-25" @default.
• W2924185635 title "Sparsity-Constrained Distributed Unmixing of Hyperspectral Data" @default.
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• W2924185635 doi "https://doi.org/10.1109/jstars.2019.2901122" @default.
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