Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
2504894 | International Journal of Pharmaceutics | 2009 | 4 Pages |
Abstract
In hyperspectral analysis, PLS-discriminant analysis (PLS-DA) is being increasingly used in conjunction with pure spectra where it is often referred to as PLS-Classification (PLS-Class). PLS-Class has been presented as a novel approach making it possible to obtain qualitative information about the distribution of the compounds in each pixel using little a priori knowledge about the image (only the pure spectrum of each compound is needed). In this short note it is shown that the PLS-Class model is the same as a straightforward classical least squares (CLS) model and it is highlighted that it is more appropriate to view this approach as CLS rather than PLS-DA. A real example illustrates the results of applying both PLS-Class and CLS.
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Authors
José Manuel Amigo, Carsten Ravn, Neal B. Gallagher, Rasmus Bro,