Using non-negative matrix factorization in the "unmixing" of diffuse reflectance spectra

Simple item page
dc.contributor.authorHeslop, David
dc.contributor.authorvon Dobeneck, T.
dc.contributor.authorHöcker, M.
dc.date.accessioned2015-12-08T22:14:13Z
dc.date.issued2007
dc.date.updated2015-12-08T07:49:02Z
dc.description.abstractDiffuse reflectance spectrophotometry (DRS), often termed simply color scanning, is a technique applied commonly to marine sediments to provide records of compositional variations. Measured DRS spectra, however, represent the bulk response of a sediment's constituents and are therefore difficult to interpret in their raw form. A quantification technique will be proposed and discussed which approaches the analysis of DRS data sets as a linear mixing problem and applies a non-negative matrix factorization (NMF) algorithm in their decomposition. The presented methodology allows the spectra of the end-member sediment constituents and their fractional abundances to be determined using only the measured data set. Unlike other DRS data processing techniques, NMF only allows additive combinations of end-members to explain the data set and will therefore return only positive abundances. Analysis of sediments from the eastern Mediterranean Sea demonstrates the applicability of the NMF approach and the new method of Orbital Cycle Stacking establishes that the "unmixed" data is consistent with expected environmental change.
dc.identifier.issn0025-3227
dc.identifier.urihttp://hdl.handle.net/1885/30138
dc.publisherElsevier
dc.sourceMarine Geology
dc.subjectKeywords: Color scanning; Linear mixing; Mediterranean; Non-negative matrix factorization; Algorithms; Factorization; Marine applications; Problem solving; Reflection; Spectrophotometry; Sediments; data processing; data set; diffusion; marine sediment; matrix; mixi Mediterranean; non-negative matrix factorization; spectrophotometry
dc.titleUsing non-negative matrix factorization in the "unmixing" of diffuse reflectance spectra
dc.typeJournal article
local.bibliographicCitation.lastpage78
local.bibliographicCitation.startpage63
local.contributor.affiliationHeslop, David, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationvon Dobeneck, T., University of Bremen
local.contributor.affiliationHöcker, M., University of Bremen
local.contributor.authoremailu4919989@anu.edu.au
local.contributor.authoruidHeslop, David, u4919989
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.identifier.absfor040499 - Geophysics not elsewhere classified
local.identifier.absfor040305 - Marine Geoscience
local.identifier.absseo970105 - Expanding Knowledge in the Environmental Sciences
local.identifier.ariespublicationu4598381xPUB71
local.identifier.citationvolume241
local.identifier.doi10.1016/j.margeo.2007.03.004
local.identifier.scopusID2-s2.0-34249746877
local.identifier.uidSubmittedByu4598381
local.type.statusPublished Version

Downloads

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
01_Heslop_Using_non-negative_matrix_2007.pdf
Size:
1.25 MB
Format:
Adobe Portable Document Format
Download

Collections

ANU Research Publications

DSpace software copyright © 2002-2024 LYRASIS