Use of local rank-based spatial information for resolution of spectroscopic images

Title: Use of local rank-based spatial information for resolution of spectroscopic images
Creator: de Juan, Anna; Maeder, Marcel; Hancewicz, Thomas; Tauler, Roma
Relation: Journal of Chemometrics Vol. 22, Issue 5, p. 291-298
Publisher Link: http://dx.doi.org/10.1002/cem.1099
Publisher: John Wiley & Sons
Resource Type: journal article
Date: 2008
Description: Spectroscopic images are singular chemical measurements that enclose chemical and spatial information about samples. Resolution of spectroscopic images is focused on the recovery of the pure spectra and distribution maps of the image constituents from the sole raw spectroscopic measurement. In image resolution, constraints are generally limited to non-negativity and the spatial information is generally not used. Local rank analysis methods have been adapted to describe the local spatial complexity of an image, providing specific pixel information. This local rank information combined with reference spectral information allows the identification of absent compounds in pixels with low compound overlap. The introduction of this information in the resolution process under the form of constraints helps to increase the performance of the resolution method and to decrease the ambiguity linked to the final solutions.
Subject: image analysis; curve resolution; MCR; local rank; constraints
Identifier: uon:5349
Identifier: http://hdl.handle.net/1959.13/43227
Identifier: ISSN:0886-9383
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