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Hyperspectral imaging and analysis
Swedish University of Agricultural Sciences, Umeå, Sweden.
Umeå universitet, Humanistiska fakulteten, Institutionen för idé- och samhällsstudier, Miljöarkeologiska laboratoriet.ORCID-id: 0000-0001-7471-8195
Prediktera AB, Umeå, Sweden.
2022 (Engelska)Ingår i: Encyclopedia of analytical chemistry: applications, theory and instrumentation / [ed] R.A. Meyers, Chichester: John Wiley & Sons, 2022, s. 1-15Kapitel i bok, del av antologi (Refereegranskat)
Abstract [en]

The concept of a hyperspectral image and the different technical steps of acquiring one are described. This includes sampling, illumination, camera calibration, and image file recording. This enables the powerful combination of being able to combine the traditional image with nonvisible chemical information and to geographically relate these types of information to each other. Hyperspectral imaging produces large data sets with geometrical-georeferenced and spectral information. A technique such as principal component analysis (PCA) produces a subset of images with the information concentrated in a few graphs and noise left out. Interactive analysis of image and scatter plots allows cleaning, and on the cleaned images a new PCA or other multivariate method can be used, creating principal component images containing the relevant information. Using this approach, latent clusters can be detected that are not evident in the initial stage of analysis. There is a large aspect of data mining involved in hyperspectral imaging analysis, which means that visual inspection and interactive brushing is one way of approaching an image with an abundance of complex information.

Ort, förlag, år, upplaga, sidor
Chichester: John Wiley & Sons, 2022. s. 1-15
Nyckelord [en]
Imaging, image analysis, chemometry
Nationell ämneskategori
Miljövetenskap Analytisk kemi
Identifikatorer
URN: urn:nbn:se:umu:diva-205655DOI: 10.1002/9780470027318.a9805ISBN: 9780471976707 (tryckt)ISBN: 9780470027318 (digital)OAI: oai:DiVA.org:umu-205655DiVA, id: diva2:1742872
Tillgänglig från: 2023-03-13 Skapad: 2023-03-13 Senast uppdaterad: 2023-03-21Bibliografiskt granskad

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Linderholm, Johan

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Totalt: 91 träffar
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