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Title
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A critical comparison of linear and nonlinear unmixing for intimate mixtures
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Author
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Abstract
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| In this study, we conducted a comparative analysis of various linear and nonlinear unmixing methods to estimate the composition of intricate clay powder mixtures based on their spectral reflectance. Our experiments were conducted using industrial clay powder mixtures generated in a laboratory. Specifically, we created 325 uniform mixtures by combining five types of clay powders: Kaolin, Roof clay, Red clay, mixed clay, and Calcium hydroxide. Among these 325 samples, 60 were binary mixtures, 150 were ternary mixtures, 100 were quaternary mixtures, and 15 were quinary mixtures. We acquired spectral data by scanning these samples using two handheld spectrometers (ASD Spectroradiometer and PSR-3500 spectral evolution) and two hyperspectral cameras (Specim AsiaFenix and Specim sCMOS). We applied several state-of-the-art unmixing methods to the generated datasets. The experimental findings indicate that specialized nonlinear unmixing methods are necessary for accurate estimation of the fractional abundances in these complex mixtures. |
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Language
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English
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Source (book)
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2023 13th Workshop on Hyperspectral Imaging and Signal Processing : Evolution in Remote Sensing (WHISPERS), 31 October 2023 - 02 November, 2023, Athens, Greece
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Publication
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2023
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ISBN
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979-83-503-9557-0
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DOI
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10.1109/WHISPERS61460.2023.10431354
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Volume/pages
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p. 1-5
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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