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OPLS methods for th...
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Dumarey, MelanieUmeå universitet,Kemiska institutionen,Computational LIfe Science Cluster (CLiC)
(författare)
OPLS methods for the analysis of hyperspectral images—comparison with MCR-ALS
- Artikel/kapitelEngelska2014
Förlag, utgivningsår, omfång ...
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2014-05-08
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John Wiley & Sons,2014
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printrdacarrier
Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:umu-89128
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https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-89128URI
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https://doi.org/10.1002/cem.2628DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
Anmärkningar
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Two new orthogonal projections to latent structures (OPLS) based methods were proposed to analyze hyperspectral images, enabling the visualization ofmultiple chemical compounds in onematrix without the need of extensive preprocessing. Both proposed methods delivered images representing the chemical distribution in the ribbon similar to the more traditional multivariate curve resolution–alternating least squares (MCR-ALS) method, but their image background was less dynamic resulting in a stronger chemical contrast. This indicated that the methods successfully removed structured variation orthogonal to the chemical information (pure spectra of individual compounds), which was confirmed by the fact that physical scattering effects caused by grooves and edges were captured in the images visualizing the orthogonal components of the model. Hereby, the OPLS-based method employing the pure spectra as weights in the OPLS algorithm was more successful in distinguishing compounds with a similar spectral signal than the transposed OPLS algorithm(pure spectra of individual compounds were used as response in OPLS model). It should be noted that for the main compounds, the MCR-ALS method enabled easier visual interpretation compared to the OPLS-based methods by setting all values below zero to zero, resulting in a higher contrast between pixels containing the studied compound and pixels not containing that compound.
Ämnesord och genrebeteckningar
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NATURVETENSKAP Kemi hsv//swe
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NATURAL SCIENCES Chemical Sciences hsv//eng
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hyperspectral imaging
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orthogonal projections to latent structures
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multivariate curve resolution–alternating least squares
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Computerized Image Analysis
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datoriserad bildanalys
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Computer Science
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datalogi
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Pharmaceutics
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galenisk farmaci
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Galindo-Prieto, BeatrizUmeå universitet,Kemiska institutionen,Computational Life Science Cluster (CLiC) / Industrial Doctoral School (IDS)(Swepub:umu)bega0007
(författare)
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Fransson, MagnusPharmaceutical Development, AstraZeneca R&D, Mölndal, Sweden
(författare)
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Josefson, MatsPharmaceutical Development, AstraZeneca R&D, Mölndal, Sweden
(författare)
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Trygg, JohanUmeå universitet,Kemiska institutionen,Computational LIfe Science Cluster (CLiC)(Swepub:umu)jotr0001
(författare)
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Umeå universitetKemiska institutionen
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Journal of Chemometrics: John Wiley & Sons28:8, s. 687-6960886-93831099-128X
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