Kernel-Based Nonlinear Spectral Unmixing with Dictionary Pruning
TLDR
A two-step kernel-based unmixing algorithm to address the case where a large spectral library is used as the candidate endmembers or the sparse mixture case, where the sparsity-inducing regularization is introduced to perform the endmember selection and the candidate library is pruned to provide more accurate results.Abstract:
Spectral unmixing extracts subpixel information by decomposing observed pixel spectra into a collection of constituent spectra signatures and their associated fractions. Considering the restriction of linear unmixing model, nonlinear unmixing algorithms find their applications in complex scenes. Kernel-based algorithms serve as important candidates for nonlinear unmixing as they do not require specific model assumption and have moderate computational complexity. In this paper we focus on the linear mixture and nonlinear fluctuation model. We propose a two-step kernel-based unmixing algorithm to address the case where a large spectral library is used as the candidate endmembers or the sparse mixture case. The sparsity-inducing regularization is introduced to perform the endmember selection and the candidate library is then pruned to provide more accurate results. Experimental results with synthetic and real data, particularly those laboratory-created labeled, show the effectiveness of the proposed algorithm compared with state-of-art methods.read more
Citations
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LSTM-DNN Based Autoencoder Network for Nonlinear Hyperspectral Image Unmixing
Min Zhao,Longbin Yan,Jie Chen +2 more
TL;DR: Wang et al. as mentioned in this paper proposed a nonsymmetric autoencoder network to exploit spectral and spatial correlation information in hyperspectral image analysis, and the proposed scheme benefits from the universal modeling ability of deep neural networks and enables to learn the nonlinear relation from the data.
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Estimation of Mineral Abundance From Hyperspectral Data Using a New Supervised Neighbor-Band Ratio Unmixing Approach
TL;DR: NBRU led to the best results among non-RT models with mean and median errors of 9.8% and 7.4%, respectively, in estimating mineral abundances from hyperspectral data, and retrieved the best spatial distributions for seven of the nine minerals mapped.
Journal ArticleDOI
Benchmark studies on pixel-level spectral unmixing of multi-resolution hyperspectral imagery
TL;DR: In this paper , the spectral unmixing-based estimation of material abundances in hyperspectral imagery has been studied from a one-to-one point of view, where the authors assess the dynamics of material abundance as a function of the source of endmembers, spatial resolution, number of materials, and the size of materials.
Journal ArticleDOI
Robust hyperspectral unmixing based on dual views with adaptive weights
TL;DR: A robust unmixing method is proposed, which exploits dual views with adaptive weights for HU (AwDvHU), which utilizes multi-kernel learning to construct a high-dimensional space that can reflect the nonlinear interaction between spectra optimally.
Journal ArticleDOI
Hyperspectral Unmixing Based on Constrained Bilinear or Linear-Quadratic Matrix Factorization
TL;DR: In this article, two unsupervised hyperspectral unmixing methods, designed for the bilinear and linear quadratic mixing models, are proposed, which can extract endmember spectra and infer the proportion of each of these spectra in each observed pixel when considering linear mixtures.
References
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